研究者データベース

張 麗華(チヤン リーフア)
工学研究院 附属エネルギー・マテリアル融合領域研究センター 光・熱エネルギー変換材料分野
准教授

基本情報

所属

  • 工学研究院 附属エネルギー・マテリアル融合領域研究センター 光・熱エネルギー変換材料分野

職名

  • 准教授

学位

  • 工学博士(北海道大学)

J-Global ID

研究キーワード

  • ナノ材料創製   ハイエントロピー合金   光化学   熱電素子   エネルギー変換   

研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 反応工学、プロセスシステム工学
  • ナノテク・材料 / ナノ材料科学
  • ナノテク・材料 / 金属生産、資源生産
  • ナノテク・材料 / 構造材料、機能材料
  • ナノテク・材料 / 金属材料物性

職歴

  • 2022年04月 - 現在 北海道大学 大学院工学研究院附属エネルギー・マテリアル融合領域研究センター 准教授
  • 2016年03月 - 2022年03月 北海道大学 大学院工学研究院 附属エネルギー・マテリアル融合領域研究センター 助教
  • 2013年07月 - 2016年03月 北海道大学 大学院工学研究院 附属エネルギー・マテリアル融合領域研究センター 特任助教
  • 2008年11月 - 2013年07月 北京科技大学冶金学院 講師

学歴

  • 2005年10月 - 2008年09月   北海道大学   大学院工学研究院   材料科学 博士後期課程

所属学協会

  • 光化学協会   日本鉄鋼協会   日本金属学会   

研究活動情報

論文

  • Zhehan Yu, Lihua Zhang, Seiichi Watanabe
    Materials Today Communications 33 104213 - 104213 2022年12月
  • Satoshi Takai, Shuntaro Murakami, Lihua Zhang, Kenichi Ohsasa, Seiichi Watanabe
    ACS Applied Engineering Materials 2022年09月13日
  • Zhehan Yu, Shilei Zhu, Lihua Zhang, Seiichi Watanabe
    Optical Materials 127 112297 - 112297 2022年05月
  • Yuki Takahashi, Melbert Jeem, Lihua Zhang, Seiichi Watanabe
    Applied Materials Today 26 101359 - 101359 2022年03月
  • Shuntaro Murakami, Lihua Zhang, Melbert Jeem, Kazumasa Okamoto, Yuki Nakagawa, Tamaki Shibayama, Masato Ohnuma, Seiichi Watanabe
    Optical Materials 124 111966 - 111966 2022年02月
  • Jumpei Tsukamura, Yuki Takahashi, Lihua Zhang, Melbert Jeem, Kazumasa Okamoto, Seiichi Watanabe
    Microelectronic Engineering 256 111727 - 111727 2022年02月
  • Souta Fujii, Shuntaro Murakami, Lihua Zhang, Seiichi Watanabe
    MATERIALS LETTERS 302 2021年11月 [査読有り]
     
    Tungsten nano-oxides of WO3 and H2WO4 have been studied as promising candidates for photocatalytic and chromic materials. To date, WO3 and H2WO4 nanoparticles are generally prepared by hydrothermal synthesis, which requires high temperature environment and pH adjustment. In this paper, we report on fabricating WO3 nanoparticles via photosynthesis by UV irradiation of the solution made from dissolving tungsten in hydrogen peroxide. Similarly, we have succeeded in fabricating H2WO4 nanoparticles by changing the concentration of hydrogen peroxide solution. Furthermore, an electrochromic device was fabricated by coating the WO3 nanoparticles on an ITO substrate, and the chromic properties are then confirmed.
  • Longfei Guo, Noriyuki Okinaka, Lihua Zhang, Seiichi Watanabe
    Optical Materials 119 111295 - 111295 2021年09月 [査読有り]
  • Shilei Zhu, Zhehan Yu, Lihua Zhang, Seiichi Watanabe
    ACS Applied Nano Materials 4 4 3940 - 3948 2021年04月23日 [査読有り]
  • Longfei Guo, Noriyuki Okinaka, Lihua Zhang, Seiichi Watanabe
    Materials Chemistry and Physics 262 124273 - 124273 2021年04月 [査読有り]
  • Weijun Zhu, Kangkai Wu, Senjing Zhang, Jun Liu, Xuemei Yi, Lihua Zhang
    Advanced Engineering Materials 23 4 2001298 - 2001298 2021年04月 [査読有り]
  • Shuntaro Murakami, Lihua Zhang, Seiichi Watanabe
    Scientific Reports 10 1 2020年12月 [査読有り]
     
    AbstractWe report a water decomposition mode called ‘Aquaionic Splitting (AiS)’ by means of iron corrosion in aqueous solution. In this paper, we investigated the phenomenon by controlling the reaction between iron and water. A pseudo-sacrificial protection method with oil paint was employed to select the anode and cathode formation locations that govern iron corrosion. Then, the AiS reaction was visualized by using BTB solution, whose colour corresponds to pH, to produce colour patterning that corresponds to the aquaion distribution. It has become clear that water can be selectively separated into protons and hydroxide ions by corrosion control treatment. In this vein, the diffusion coefficient of protons was estimated by using the colour patterning of BTB solution that accompanies iron corrosion, and aquaion distribution was then computer simulated by solving the diffusion equation.
  • Gotoh Tomoya, Jeem Melbert, Zhang Lihua, Okinaka Noriyuki, Watanabe Seiichi
    Journal of Physics and Chemistry of Solids 142 109436 - 109436 2020年07月 [査読有り]
  • Yuki Takahashi, Kento Hiraiwa, Melbert Jeem, Lihua Zhang, Seiichi Watanabe
    Applied surface science 489 313 - 320 2019年06月 [査読有り][通常論文]
  • Lihua Zhang, Melbert Jeem, Kazumasa Okamoto, Seiichi Watanabe
    ISIJ INTERNATIONAL 59 12 2352 - 2358 2019年 [査読有り][通常論文]
     
    Recently, metal oxide nanocrystallites have been synthesized through a new pathway, i.e., the submerged photosynthesis of crystallites (SPSC), and flower-like ZnO and CuO nanostructures have been successfully fabricated via this method. In this work, the SPSC process was applied for the fabrication of iron oxide and hydroxide nanoparticles. The experiments were conducted under visible light, ultraviolet light, and gamma-ray irradiation conditions and the morphologies of the obtained nanoparticles were observed and compared with that obtained without illumination. Then, the mechanism of the SPSC process for the fabrication of iron oxide nanoparticles was discussed. The results show that various kinds of morphologies of nanocrystallites were obtained on the Fe plate surface and the main morphologies are different under different conditions. For example, most FeOOH with the morphologies of nanorod and nanofiber exist by visible light irradiation; most faceted crystals of FeOOH and Fe2O3 with the morphologies of nanograular and nanorod exist by ultraviolet irradiation. In the SPSC process, light irradiation generates center dot OH at the crystal tips and promote the crystallization in apical growth of FeOOH.
  • Lihua Zhang, Melbert Jeem, Kazumasa Okamoto, Seiichi Watanabe
    SCIENTIFIC REPORTS 8 2018年01月 [査読有り][通常論文]
     
    Recently, metal oxide nanocrystallites have been synthesized through a new pathway, i.e., the submerged photosynthesis of crystallites (SPSC), and flower-like ZnO nanostructures have been successfully fabricated via this method. However, the photochemical reactions involved in the SPSC process and especially the role of light are still unclear. In the present work, we discuss the reaction mechanism for SPSC-fabricated ZnO nanostructures in detail and clarify the role of light in SPSC. The results show that both photoinduced reactions and hydrothermal reactions are involved in the SPSC process. The former produces OH radicals, which is the main source of OH-at the ZnO crystal tips, whereas the latter generates ZnO. Although ZnO nanocrystals can be obtained under both UV irradiation and dark conditions with the addition of thermal energy, light promotes ZnO growth and lowers the water pH to neutral, whereas thermal energy promotes ZnO corrosion and increases the water pH under dark conditions. The study concludes that the role of light in the submerged photosynthesis of crystallites process is to enhance ZnO apical growth at relatively lower temperature by preventing the pH of water from increasing, revealing the environmentally benign characteristics of the present process.
  • Fumika Nishino, Melbert Jeem, Lihua Zhang, Kazumasa Okamoto, Satoshi Okabe, Seiichi Watanabe
    SCIENTIFIC REPORTS 7 2017年04月 [査読有り][通常論文]
     
    We report the fabrication of flower-like CuO nanostructured surfaces via submerged photo-synthesis of crystallites (SPSC), which requires only UV illumination in neutral water. In this paper, we discuss the reaction mechanism of the photochemical formation of the SPSC-fabricated CuO nanostructures in detail based on surface microstructural analyses and a radiation-chemical consideration with additional gamma-ray irradiation. Since the SPSC method for surface nanostructural fabrication can work at low temperatures at atmospheric pressure without using harmful substances, it is a potential fabrication method for green nanotechnology applications. In this vein, the antibacterial activity of the nano-flowered CuO surfaces was tested against Gram-positive (Staphylococcus aureus) bacteria and Gram-negative (Escherichia coli K12) bacteria, and the results demonstrate that the nano-flowered CuO nanostructures act as an effective antimicrobial agent.
  • Melbert Jeem, Lihua Zhang, Junya Ishioka, Tamaki Shibayama, Tomio Iwasaki, Takahiko Kato, Seiichi Watanabe
    NANO LETTERS 17 3 2088 - 2093 2017年03月 [査読有り][通常論文]
     
    When applied in optoelectronic devices, a ZnO semiconductor dominantly absorbs or emits ultraviolet light because of its direct electron transition through a wide energy bandgap. On the contrary, crystal defects and nanostructure morphology are the chief key factors for indirect, interband transitions of ZnO optoelectronic devices in the visible light range. By ultraviolet illumination in ultrapure water, we demonstrate here a conceptually unique approach to tune the shape of ZnO nanorods from tapered to capped end via apical surface morphology control. We show that oxygen vacancy point defects activated by excitonic effects near the tip-edge of a nanorod serve as an optoelectrical hotspot for the light-driven formation and tunability of the optoelectrical properties. A double increase of electron energy absorption on near band edge energy of ZnO was observed near the tip-edge of the tapered nanorod. The optoelectrical hotspot explanation rivals that of conventional electrostatics, impurity control, and alkaline pH control-associated mechanisms. Thus, it highlights a new perspective to understanding light-driven nanorod formation in pure neutral water.
  • Lihua Zhang, Kazuya Kurokawa
    OXIDATION OF METALS 85 3-4 311 - 320 2016年04月 [査読有り][通常論文]
     
    The oxidation behavior of ZrB2-SiC composites with different contents of SiC addition was investigated at 1273 and 1473 K in air for 12 h in this study. The SiC addition contents ranged from 0 to 30 wt%. The results showed that when ZrB2-SiC composites were oxidized at 1273 K in air, a two-oxide layer-structure forms: a continuous glassy layer and a ZrO2 layer contained unoxidized SiC. When SiC content is 5 and 10 wt%, the glassy layer is mainly composed by B2O3. When SiC content is 20 and 30 wt%, a borosilicate glass could be formed on the top layer, which could improve the oxidation resistance of ZrB2. When ZrB2-SiC composites were oxidized at 1473 K in air, the oxide layer was composed of ZrO2 and SiO2 and unreacted SiC. Additionally, when SiC addition content was higher than 10 wt%, a continuous borosilicate glass layer could be formed on the top of the oxide layer at 1473 K. With the increase of SiC content in ZrB2, the oxide layer thickness decreased at both 1273 and 1473 K.
  • Shengli Wu, Biyang Tuo, Lihua Zhang, Kaiping Du, Ying Sun
    STEEL RESEARCH INTERNATIONAL 85 2 233 - 242 2014年02月 [査読有り][通常論文]
     
    Based on the analysis of the existing evaluation methods and with the combination of the characteristic of cohesive zone characteristic in blast furnace (BF) and softening-melting and dropping experimental result of iron bearing burden, a new evaluation method of softening-melting and dropping characteristic of iron bearing burden was put forward, which can be used for evaluating various kinds of iron bearing burden. The softening-melting and dropping characteristics of the mixed burden and the high metalized burden are evaluated through the new method, which verified that the new method is reasonable and feasible. The results showed that the new method can judge not only the corresponding relation between the shrinking percentage and the unit charge column pressure drop, but also the influence of softening and melting temperature interval, melting temperature interval and dropping temperature interval on the softening-melting and dropping characteristic value of iron bearing burden. This new method is expected to provide technical guidance for BF smelting.
  • Mingyin Kou, Shengli Wu, Wei Shen, Kaiping Du, Lihua Zhang, Jing Sun
    ISIJ INTERNATIONAL 53 12 2080 - 2089 2013年 [査読有り][通常論文]
     
    Screws in COREX shaft furnace are used to discharge burdens to the latter processor - the melter gasifier. They play a very important role in the uniform drawdown pattern, which directly affects the uniform gas distribution and further the smooth operation in the COREX shaft furnace. Therefore, a three dimensional model is established based on the discrete element method (DEM) in the present work. The model is used to investigate the effect of the bottom diameter of COREX shaft furnace, the cylinder height and the screw flight diameter on particle descending velocity along the radius during discharging process. Results show that the descending velocity decreases along the radial direction. It is better to decrease the bottom diameter of COREX shaft furnace, or the screw flight diameter, or to increase the cylinder height in order to achieve a uniform descending velocity along the radius. An optimization model is also proposed for uniform drawdown pattern in the end.
  • Influence of coke reactivity on the ferric burden reduction of the lumpy zone in a blast furnace
    Shengli Wu, Biyang Tuo, Lihua Zhang, Liang Guo, Jianlong Wu, Yu Zhou
    Journal of University of Science and Technology Beijing 2013年 [査読有り][通常論文]
  • Lihua Zhang, Jiaxin Fan, Shengli Wu
    CHEMICAL ENGINEERING AND MATERIAL PROPERTIES, PTS 1 AND 2 391-392 81 - + 2012年 [査読有り][通常論文]
     
    In this paper, the modes of occurrence of the trace elements of Na, K, Fe and Si in SX-Coal and SD-Coal, which were used for COREX process, were analyzed. The coal was treated by wet digestion method and then the content of trace elements was analyzed. After that, the modes of occurrence of the elements were studied by sequential extraction procedure method and analyzed by ICP-OES. The results showed that the content of Na element is the highest and the content of K and Si elements is very low among the four elements in both kinds of coal. Na and K elements mainly exist in the mode of residue in SX-Coal and SD-Coal, and they are tends to enriched in the residue during the pyrolysis. Fe and Si elements mainly exist in the mode of carbonate, iron oxides and manganese oxides in SD-Coal. Fe and Si are tends to be decomposed from the compounds during the pyrolysis.
  • Lihua Zhang, Noriyuki Okinaka, Tsuyoshi Tosho, Tomohiro Akiyama
    JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS 14 1-2 67 - 71 2012年01月 [査読有り][通常論文]
     
    In this paper, layered cobalt oxides of Ca3Co4O9 and Bi-doped Ca3Co4O9 were synthesized by solution combustion synthesis with post-spark plasma sintering method, and the thermoelectric properties of the synthesized materials were analyzed from different directions. The synthesized bulk samples showed a relatively high orientation degree analyzed by XRD degree, and the Lotgering factor of Ca3Co4O9 and Bi-doped Ca3Co4O9 is 0.70 and 0.91 respectively. Thermoelectric properties measured from different directions show that the power factor and ZT value measured perpendicular to the press direction are relatively higher and the highest ZT value 0.11 was obtained by Bi-doped Ca3Co4O9 at 857 K.
  • Jian Xu, Shengli Wu, Mingyin Kou, Lihua Zhang, Xiaobo Yu
    APPLIED MATHEMATICAL MODELLING 35 3 1439 - 1455 2011年03月 [査読有り][通常論文]
     
    It is of critical importance to master the circumferential burden distribution behaviors at bell-less top blast furnace with parallel type hoppers, targeting to reduce the uneven degree (UD) of burden distribution along the circumference. Combining with the burden motion conditions, both circumferential falling point (FP) and mass flow (MF) models are established in present work to determine the basic distribution behaviors systematically. The results show that the positive amplitude of either FP or MF is not equal to the negative counterpart in the circumferential direction. Besides, the UD of MF is nearly 10 times as large as that of FP, which could be ignored in actual production. After validating the circumferential MF model against both laboratory and industry-scale measurements from previous literatures, alternating the hoppers while keeping the same chute rotating direction in burden charging process is considered as the best countermeasure to promote even burden circumferential distribution at bell-less top blast furnace with parallel type hoppers. (C) 2010 Elsevier Inc. All rights reserved.
  • Lihua Zhang, Noriyuki Okinaka, Tsuyoshi Tosho, Tomohiro Akiyama
    FRONTIERS OF GREEN BUILDING, MATERIALS AND CIVIL ENGINEERING, PTS 1-8 71-78 1213 - + 2011年 [査読有り][通常論文]
     
    NaxCo2O4 (x = 1.4 similar to 1.9) ceramics were synthesized by solution combustion synthesis (SCS) method and sintered by spark plasma sintering (S PS) method in this paper. The synthesized bulk samples showed a relatively high orientation degree analyzed by XRD. Thermoelectric properties of the as synthesized bulk samples were investigated in the direction parallel to the press direction of SPS from room temperature to 857 K. Among all the samples, the highest power factor 3.07 x 10(-4) W.m(-1).K-2 was obtained at 817 K when x = 1.6, and the highest ZT value of this sample was 0.064 at 817 K.
  • Shengli Wu, Jian Xu, Jun-ichiro Yagi, Xinying Guo, Lihua Zhang
    ISIJ INTERNATIONAL 51 8 1344 - 1352 2011年 [査読有り][通常論文]
     
    Top gas recycling is considered as one of the highest potential technologies to improve reduction efficiency and correspondingly to reduce carbon consumption. As a typical nitrogen free ironmaking process, pre-reduction shaft furnace of COREX (R) process (COREX (R) shaft furnace) for short is suitable to adopt the technology aiming to cut down CO2 emission. Under the premise of constant total injection volume, three kinds of reducing gas injection methods are numerically studied by employing a two-dimensional mathematical model. The method that 20% of total reducing gas in volume fraction is blasted through normal inlet (NI) while the rest through down pipe inlet (PI) rather than deadman inlet (DI) could apparently improve gas flow in the inactive zone located near the bottom direct reduced iron (DRI) outlet, thus increasing DRI reduction degree to 61% under present calculation conditions. Meanwhile, either decreasing the vertical height of PI or increasing its diameter makes further improvement on furnace efficiency. After adopting top gas recycling to the shaft furnace by NI+PI method with optimal parameters, CO utilization ratio reaches above 46% when DRI reduction degree correspondingly increases by 12%, what's more, CO2 emission from the whole process is reduced by about 540 Nm(3)/tHM. The results prove that top gas recycling technology promotes reduction efficiency inside shaft furnace and greatly reduces the greenhouse gas emission, which will contribute to suppressing global warming.
  • Asami Kikuchi, Lihua Zhang, Noriyuki Okinaka, Tsuyoshi Tosho, Tomohiro Akiyama
    MATERIALS TRANSACTIONS 51 10 1919 - 1922 2010年10月 [査読有り][通常論文]
     
    This paper describes thermoelectric properties of La doped SrTiO3 prepared by using a combination of combustion synthesis (CS) with post spark plasma sintering (SPS) on which effects of sintering temperature were mainly examined In experimental combustion synthesized (CSed) samples (Sr1-xLaxTiO3 x = 0 08) were spark pla ma sintered (SPSed) at temperatures from 1513 to 1663 K and the thermoelectric properties of sintered Sr-0 La-92(0 08) TiO3 were measured from room temperature to 1073 K In experimental sintering temperature range sintering temperature didn t heavily affect the average grain size of sintered SLTO in the case that sintering temperature ranges from 1543 to 1603 K However when sintering temperature rose over 1603 K the average grain size of sintered SLTO was dramatically affected and it Increased with,sintering temperature With increasing sintering temperature the effects of phonon scattering it grain boundaries decreased therefore thermal conductivity of all sintered samples increased with sintering temperature With increasing sintering temperature electric conductivity of sintered SLTO increased and absolute value of Seebeck coefficient of sintered SLTO decreased because sintering at higher temperature caused the more oxygen defects which generate the larger carrier density In conclusion the product sintered at 1573 K showed the maximum of the dimensionless figure of merit of 0 16 at 1005 K [doi 10 2320/matertrans M2010102]
  • OKINAKA Noriyuki, ZHANG Lihua, AKIYAMA Tomohiro
    ISIJ Int (Iron Steel Inst Jpn) 50 9 1300 - 1304 The Iron and Steel Institute of Japan 2010年 [査読有り][通常論文]
     
    Thermoelectric properties of combustion synthesized and spark plasma sintered rare-earth-doped (La, Sm, Gd, Dy and Y) SrTiO3 was investigated from room temperature to 870 K from viewpoint of energy and time saving without deterioration in thermoelectric properties. All single phases of rare-earth-doped SrTiO3 were successfully synthesized and sintered with high densities. With temperature increasing, the absolute value of Seebeck coefficient of all the samples increased and the electric conductivity decreased; the power factor of all the samples decreased except Y-doped sample in the considering temperature range. In all the samples, the La-doped sample and the Y-doped sample had the highest and lowest power factor, respectively. The figure of merit of La-doped samples with different doping amounts was evaluated and the maximum figure of merit 0.22 was obtained at 800 K from Sr0.92La0.08TiO3 sample. Comparing Y and La-doped samples prepared by our synthesis method with that of conventional solid-state reaction method, the thermoelectric properties of our samples were relatively higher. Thus the combination of combustion synthesis and spark plasma sintering has a potential to prepare perovskite-oxide materials with relatively higher thermoelectric properties for high-temperature application.
  • Assimilation of iron ores and ore matching method based on complementary assimilation
    Lijuan Yan, Shengli Wu, Yi Zhou, Yuandong Pei, Lihua Zhang
    Journal of University of Science and Technology Beijing 32 2 164 - 169 2010年 [査読有り][通常論文]
  • Exhaust emission law at different bed depths in sintering process
    Shengli Wu, Dongfeng Chen, Chengxian Zhao, Lihua Zhang, Hongliang Han, Fang Xue
    Journal of University of Science and Technology Beijing 32 3 298 - 305 2010年 [査読有り][通常論文]
  • Shengli Wu, Jian Xu, Shidong Yang, Qi Zhou, Lihua Zhang
    ISIJ INTERNATIONAL 50 7 1032 - 1039 2010年 [査読有り][通常論文]
     
    A two-dimensional mathematical model is developed to describe iron oxides reduction in the shaft furnace of COREX (R) smelting reduction process. Combined with mass, momentum and heat transfers between gas and solid phases in steady state, the model calculates and demonstrates the basic characteristics of the shaft furnace, such as velocity, pressure, temperature fields of relevant phases and species' mass fraction distributions. The reduction from magnetite to wustite occupies most part of the furnace, and the reduction degree of burden located near wall is comparatively higher than that close to centre. The model also considers the influence of down pipe gas, driven by the pressure drop between the shaft furnace and melter gasifier, on the reduction behaviors inside furnace. Compared with the base case, the down pipe gas featuring higher temperature prefers to flow toward the symmetry axis, where both gas temperature and solid metallization are promoted remarkably.
  • Asami Kikuchi, Lihua Zhang, Noriyuki Okinaka, Tsuyoshi Tosho, Tomohiro Akiyama
    MATERIALS TRANSACTIONS 50 11 2675 - 2679 2009年11月 [査読有り][通常論文]
     
    Thermoelectric properties of La-doped SrTiO3 were investigated in order to determine the optimum sintering temperature for its fabrication by using a combination of combustion synthesis and spark plasma sintering. Combustion-synthesized samples (Sr1-xLaxTiO3, x = 0.08) were subjected to spark plasma sintering at temperatures from 1513 to 1663 K. The average grain size of sintered Sr0.92La0.08TiO3 enlarged as sintering temperature rose up. The maximum average grain size was 23.5 mu m for a sintering temperature of 1663 K. The thermoelectric properties of sintered Sr0.92La0.08TiO3 were measured from room temperature to 1073 K. The optimum sintering temperature in the experimental sintering temperature range was 1633 K. Among the samples, the Sr0.92La0.08TiO3 sample sintercd at 1633 K showed the maximum power factor of 1.51 x 10(-3) Wm(-1)K(-1) at 375 K. Further, we investigated the effects of pressing direction during sintering on the thermoelectric properties of combustion-synthesized Sr0.92La0.08TiO3. The combustion-synthesized samples were sintered well along the pressing direction during sintering: therefore, the electric conductivity measured along the pressing direction during sintering was more than twice that measured along the direction perpendicular to the pressing direction during sintering. Thus, we concluded that pressing direction during sintering affected the electric property of Sr0.92La0.08TiO3. [doi: 10.2320/matertrans.M2009225]
  • L. Zhang, T. Akiyama
    INTERNATIONAL JOURNAL OF EXERGY 6 2 214 - 227 2009年 [査読有り][通常論文]
     
    Any fossil fuel energy, after industrial utilisation such as combustion and electric generation, is finally emitted in the form of waste heat to the atmosphere. A database on waste heat revealed that a large amount of energy can be saved by reusing the high-temperature industrial waste heat efficiently. Thus, this paper introduces cutting-edge technologies for heat recovery by three promising methods, using latent heat, reaction heat, and a Thermoelectric Device (TED). Here, the advantages of a trans-heat container using a Phase Change Material (PCM), co-production using an endothermic reaction, and a TED using oxides are theoretically explained from the viewpoint of exergy loss minimisation, respectively.
  • Lihua Zhang, Tsuyoshi Tosho, Noriyuki Okinaka, Tomohiro Akiyama
    MATERIALS TRANSACTIONS 49 12 2868 - 2874 2008年12月 [査読有り][通常論文]
     
    Thermoelectric properties of Al-doped ZnO prepared by solution combustion synthesis using urea as fuel and sintered by spark plasma sintering were investigated for developing an energy- and time-saving synthesis method to decrease its thermal conductivity without a significant deterioration in other thermoelectric properties. The desired materials were successfully synthesized and sintered. The thermoelectric properties of the synthesized products subjected to planetary ball milling (PBM) treatment before sintering were compared with those of synthesized products not subjected to PBM treatment; the results showed that the former products had a larger power factor and higher thermal conductivity than the latter products. The thermal conductivity of all as-synthesized products was in the range of 8.3-19.7 W.m(-1).K-1 at room temperature, which was significantly lower than that of the products synthesized by a conventional solid-state reaction method. (Zn0.99Al0.01)O obtained by PBM had the highest dimensionless figure of merit ZT of 0.050 at 863 K. Front these results, it is inferred that solution combustion synthesis is an effective method for synthesizing Al-doped ZnO with relatively low thermal conductivity for high-temperature thermoelectric applications. [doi: 10.2320/matertrans.MAW200801]
  • Lihua Zhang, Tsuyoshi Tosho, Noriyuki Okinaka, Tomohiro Akiyama
    MATERIALS TRANSACTIONS 49 7 1675 - 1680 2008年07月 [査読有り][通常論文]
     
    This paper describes the design of two- and three-stage cascaded oxide thermoelectric generators (TEGs) for high-temperature heat recovers' Using. reported data to optimize energy conversion efficiency. We used the general intermetallic compounds Bi-2(Se,Te)(3) and (Bi,Sb)(2)Te-3 for the low-temperature stages and oxides of TiO1.1, La-doped SrTiO3, NaxCo2O4, and Al-doped ZnO for the higher-temperature stages. A two-stage TEG with TiO1.1 as the p-type material and La-doped SrTiO3 as the n-type material was found to have the highest efficiency at heat-source temperatures below 852 K, while the three-stage TEG was slightly more efficient than the two-stage TEG for heat-source temperatures above 852 K. For the three-stage TEG, the optimal boundary temperature of the second and third stages was calculated to be 698 K; at (his temperature. the maximum energy conversion efficiency, 13.5%. was obtained at a heat-source temperature of 1223 K. The results showed that the designed two- and three-stage cascaded oxide TEGs have high potential for heat recovery from high-temperature waste.
  • Materials Transactions 48 8 2088 - 2093 2007年08月 [査読有り][通常論文]
     
    Thermoelectric properties of combustion synthesized and spark plasma sintered rare-earth-doped (Y, La, Sm, Gd and Dy) SrTiO3 was investigated from room temperature to 870 K toward the viewpoint of energy and time saving without deterioration in thermoelectric properties. All the rare-earth-doped SrTiO3 were successfully synthesized and sintered with high purities and high densities. With temperature increasing, the absolute value of Seebeck coefficient increased and the electric conductivity decreased; the power factor of all the samples decreased except Y-doped sample in the experimental temperature range. In all the samples, the La-doped SrTiO3 and the Y-doped SrTiO3 had the highest and the lowest power factor, respectively. The dimensionless figure of merit ZT of La-doped samples with different doping amount was evaluated and the maximum ZT was 0.22, which was obtained at 800 K from Sr0.92La0.08TiO3 sample. Comparing Y and La-doped samples prepared by our method with that of conventional solid-state reaction method, the thermoelectric properties of our samples were relatively higher. Thus the combination of combustion synthesis and spark plasma sintering has a potential to prepare perovskite-oxide materials with relatively higher thermoelectric properties for high-temperature application.
  • Lihua Zhang, Tsuyoshi Tosho, Noriyuki Okinaka, Tomohiro Akiyama
    MATERIALS TRANSACTIONS 48 5 1079 - 1083 2007年05月 [査読有り][通常論文]
     
    The possibility of combustion synthesis of perovskite-oxide thermoelectric materials with the attendant saving of energy and time and without deterioration in the thermoelectric properties was investigated by evaluating the thermoelectric properties of lanthanum-doped strontium titanate (Sr1-xLaxTiO3, 0 <= x <= 0.1). The materials were successfully combustion synthesized and spark plasma sintered with 98.0-99.6% of true density, and their thermoelectric properties were evaluated from room temperature to 850 K. The optimal lanthanum doping amount ratio x in the considered temperature range was from 0.06 to 0.08, in which Sr0.92La0.08TiO3 sample showed the maximum ZT of 0.22 at 800 K. This value was close to the highest recorded ZT at the same temperature up to now, and the ZT of most samples are higher than those synthesized by the conventional solid state reaction method. Thus, combustion synthesis is promising for producing perovskite-oxide thermoelectric materials for high-temperature application.

書籍

  • Combustion Synthesis of Oxides for Thermoelectric Application
    Lihua Zhang, Noriyuki Okinaka, Tomohiro Akiyama (担当:共著)
    LAP LAMBERT Academic Publishing 2015年

講演・口頭発表等

  • G-SPSCを用いた欠陥制御による色調表面パターニング
    塚村順平, 髙橋優樹, 張麗華, ジェームメルバート, 岡本一将, 渡辺精一
    日本金属学会2021年秋期講演(第169回)大会 2021年09月
  • 鉄腐食を利用したヒドロゲル中アクアイオン拡散係数定量評価
    高井智史, 村上俊太郎, 張麗華, 渡辺精一
    日本金属学会2021年秋期講演(第169回)大会 2021年09月
  • 液相燃焼合成製赤色発光蛍光体YAG:Sm3+の特性評価
    山﨑和太郎, 張麗華, 沖中憲之, 渡辺精一
    2021年度日本鉄鋼協会・日本金属学会両北海道支部合同サマーセッション 2021年07月
  • 放電プラズマ焼結によるAl,Ga 共ドープ ZnO の熱電性能
    大澤雅弥, 張麗華, 沖中憲之, 渡辺精一
    2021年度日本鉄鋼協会・日本金属学会両北海道支部合同サマーセッション 2021年07月
  • 鉄腐食を利用したヒドロゲル中アクアイオン拡散係数の定量評価の試み
    高井智史, 村上俊太郎, 張麗華, 渡辺精一
    2021年度日本鉄鋼協会・日本金属学会両北海道支部合同サマーセッション 2021年07月
  • 水中結晶光合成法を用いた欠陥制御による色調表面パターニング
    塚村順平, 髙橋優樹, 張麗華, Melbert Jeem, 岡本一将, 渡辺精一
    2021年度日本鉄鋼協会・日本金属学会両北海道支部合同サマーセッション 2021年07月
  • クロミック特性を利用した量子ビーム検知材料の創製
    村上 俊太郎, 張 麗華, 渡辺 精一
    日本金属学会第168回講演大会 2021年03月
  • 触媒担持チタン酸ストロンチウムの作製と評価
    石黒充, 沖中憲之, 張華麗, 渡辺精一
    日本金属学会、日本鉄鋼協会両支部合同冬季講演大会 2021年01月
  • 液相燃焼合成によるアルミン酸ストロンチウム蓄光体の作製と応用
    増田倫大, 沖中憲之, 張麗華, 渡辺精一
    日本金属学会、日本鉄鋼協会両支部合同冬季講演大会 2021年01月
  • 水中結晶光合成法により作製したシモンコライトナノ結晶の電子顕微鏡的評価
    武田瑛範, Melbert Jeem, 張麗華, 渡辺精一
    日本顕微鏡学会第63回シンポジウム 2020年11月
  • Longfei GUO, Noriyuki OKINAKA, Lihua ZHANG, Seiichi WATANABE
    Facile Synthesis of ZnFe, nO, Composite for, Enhanced Photocatalytic, Photo-Fenton Reaction
    日本金属学会第167回講演会 2020年09月
  • NaCl水溶液を用いた水中結晶光合成法によるシモンコライトナノ結晶作製
    武田 瑛範, Melbert Jeem, 張 麗華, 渡辺 精一
    日本金属学会第167回講演会 2020年09月
  • 金属酸化物ナノ粒子の水中結晶光合成における光化学
    張 麗華, 渡辺 精一
    日本金属学会第167回講演会 2020年09月
  • 鉄腐食に伴う水のイオン分離現象
    村上 俊太郎, 張 麗華, 渡辺 精一
    日本金属学会第167回講演会 2020年09月
  • 過酸化水素を用いた水中結晶光合成による酸化タングステンナノ粒子作製とデバイス応用
    藤井 聡汰, 村上 俊太郎, 張 麗華, 渡辺 精一
    日本金属学会第167回講演会 2020年09月
  • メカニカルアロイングと放電プラズマ焼結を用いたLaドープSrTiO3熱電材料の作製
    星野 諒哉, 張 麗華, 沖中 憲之
    日本金属学会第167回講演会 2020年09月
  • Facile Synthesis of ZnFe2O4/SnO2 Composite for Enhanced Photocatalytic and Photo-Fenton Reaction
    Longfei Guo, Noriyuki Okinaka, Lihua Zhang, Seiichi Watanabe
    日本金属学会、日本鉄鋼協会両支部合同冬季講演大会 2020年01月
  • ガルバニック水中結晶光合成法の基礎と機能表面作製
    高橋優樹, 平岩健聖, 水野潤一, Melbert Jeem, Lihua Zhang, 渡辺精一
    日本金属学会、日本鉄鋼協会両支部合同冬季講演大会 2020年01月
  • 次世代光触媒材料としてのタンタル酸カリウムの作製と応用
    森山拓哉、沖中憲之、張麗華、渡辺精一
    日本金属学会、日本鉄鋼協会両支部合同冬季講演大会 2020年01月
  • 鉄の腐食に伴う水のイオン分離現象
    村上俊太郎, 張麗華, 渡辺精一
    日本金属学会、日本鉄鋼協会両支部合同冬季講演大会 2020年01月
  • Photochemistry and the Role of Light in Submerged Photosynthesis of ZnO Nanorods
    Lihua Zhang, Melbert Jeem, Seiichi Watanabe
    2019 MRS Fall Meeting 2019年12月
  • 鉄の腐食に伴う水のイオン分離パターニング形成及びその可視化
    村上俊太郎, 張麗華, 渡辺精一
    日本鉄鋼協会 第178回秋季講演大会 2019年09月
  • Cu添加ウニ形鉄酸化物におけるフェントン反応性能調査
    戸田敦規, 張麗華, 渡辺精一
    日本鉄鋼協会 第178回秋季講演大会 2019年09月
  • 水中光合成による酸化鉄ナノ粒子の作製と異なる光源下での形態
    張麗華, 沖中憲之, 岡本一将, 渡辺精一
    日本鉄鋼協会 第178回秋季講演大会 2019年09月
  • A‐USC用ボイラ伝熱管へのNi添加SiAlON溶射時の成膜過程と被膜厚さ  [通常講演]
    沖中憲之, 橋本燎, 張麗華, 渡辺精一, 黒川一哉
    本鉄鋼協会日本金属学会両支部合同冬季講演大会 2019年01月 口頭発表(一般)
  • The Role of Light During the Submerged Photosynthesis of ZnO Nanorods  [通常講演]
    Lihua Zhang, Melbert Jeem, Seiichi Watanabe
    10th Asian Photochemistry Conference 2018年12月
  • Controlling the Opto-electrical Properties of ZnO Nanorods via Submerged Photosynthesis of Crystallites. 10th Asian Photochemistry Conference.  [通常講演]
    Melbert Jeem, Lihua Zhang, Seiichi Watanabe
    10th Asian Photochemistry Conference 2018年12月
  • ガルバニック水中結晶光合成法による光機能デバイス作製  [通常講演]
    高橋優樹, 平岩健聖, Melbert Jeem, 張麗華, 渡辺精一
    日本金属学会2018年秋期(第163回)講演大会 2018年09月
  • 鉄の腐食による水イオン分離パターニング形成  [通常講演]
    村上俊太郎, 張麗華, 渡辺精一
    日本金属学会2018年秋期(第163回)講演大会 2018年09月
  • Fabrication of iron oxide nanoparticles via submerged photo-synthesis and their photocatalytic activities  [通常講演]
    張麗華, 高井大, 渡辺精一
    日本金属学会2018年秋期(第163回)講演大会 2018年09月
  • 液相燃焼合成による青色光励起黄色蓄光体の作製  [通常講演]
    後藤智哉, 沖中憲之, 渡辺精一, 張麗華
    日本金属学会日本鉄鋼協会両支部合同サマーセッション 2018年07月
  • Photochemistry and the role of light during the submerged photosynthesis of ZnO nanorods  [通常講演]
    張麗華, メルバート ジェーム, 岡本一将, 渡辺精一
    日本金属学会2018年春期(第162回)講演大会 2018年03月
  • ガルバニック効果を利用した水中結晶光合成法によるZnOナノロッド/Cu基板の作製  [通常講演]
    高橋優樹, 平岩健聖, メルバート ジェーム, 張麗華, 渡辺精一
    日本金属学会2018年春期(第162回)講演大会 2018年03月
  • 液相燃焼合成法によって合成されたBi –SrTiO3光触媒の可視光活性評価  [通常講演]
    田名瀬佑, 沖中憲之, 渡辺精一, 張麗華
    平成29年度日本鉄鋼協会・日本金属学会両北海道支部合同冬季講演大会 2018年01月
  • ZnO nanorods opto-electrical properties control by excitonic defects and their evaluation using STEM-VEELS  [通常講演]
    Melbert Jeem, Lihua Zhang, Kazumasa Okamoto, Seiichi Watanabe
    第6回エネルギー・マテリアル融合領域シンポジウム「未来の社会を支えるエネルギーとマテリアル」 2018年01月
  • Formation of metal oxide nanocrystallites by submerged photo-synthesis and the role of light during the process  [通常講演]
    Lihua Zhang, Melbert Jeem, Kazumasa Okamoto, Seiichi Watanabe
    第6回エネルギー・マテリアル融合領域シンポジウム「未来の社会を支えるエネルギーとマテリアル」 2018年01月
  • Photochemistry of submerged photosynthesis of crystallites for oxide nanorods fabrication on zinc surface  [通常講演]
    張麗華, Melbert Jeem, 岡本一将, 渡辺精一
    日本金属学会2017年秋期講演大会 2017年09月
  • グリーン応用のための水中結晶光合成によるナノ鉄水酸化物の創製  [通常講演]
    高井大, 張麗華, 岡本一将, 沖中憲之, 渡辺精一
    材料とプロセス(CD-ROM) 2017年08月 口頭発表(一般)
  • Photochemistry of submerged photosynthesis of crystallites for oxide nanorods fabrication on zinc surface  [通常講演]
    Lihua Zhang, Noriyuki Okinaka, Seiichi Watanabe
    第6回エネルギー・マテリアル融合領域シンポジウム「クリーンテクノロジーに資する機能性マテリアル」 2017年01月
  • Thermoelectric properties of Y-doped SrTiO3 prepared by combustion synthesis with post-spark plasma sintering  [通常講演]
    段楚晨, 張麗華, 沖中憲之, 渡辺精一
    第17回北海道エネルギー資源環境研究発表会 2017年01月
  • Photochemistry of Submerged Photosynthesis of Crystallites for Oxide Nanorods Fabrication on Znic Surface  [通常講演]
    Lihua Zhang, Noriyuki Okinaka, Seiichi Watanabe
    5th Hokkaido Universit-Seoul National University Joint Symposium 2016年11月
  • 水中結晶光合成法による鉄酸化物・水酸化物のナノ結晶作製  [通常講演]
    高井大, 西野史香, Melbert Jeem, 張麗華, 沖中憲之, 渡辺精一, 岡本一将
    日本金属学会2016年秋期講演大会 2016年09月
  • 水中結晶光合成法による酸化銅表面ナノ構造体の創製  [通常講演]
    西野史香, Melbert Jeem, 張麗華, 岡本一将, 渡辺精一
    表面技術協会第134回講演大会 2016年09月
  • SrAl2O4蓄光体の組成が蓄光性能に与える影響  [通常講演]
    武井翔一, 張麗華, 沖中憲之, 渡辺精一
    日本金属学会鉄鋼協会両支部合同サマーセッション 2016年07月
  • 次世代石炭火力発電用ボイラ伝熱管に向けたSiAlON溶射ステンレス材の微細組織  [通常講演]
    川浪明日翔, 張麗華, 沖中憲之, 大久保賢二, 渡辺精一, 黒川一哉
    日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集 2015年12月

その他活動・業績

特許

  • 特願2018-174008:機能水の製造方法及び機能水生成器  2018年09月18日
    足立修一郎, 北川雅規, 渡辺精一, 張麗華, 村上俊太郎, 高橋優樹
  • 特願WO 2018/043348 A1:Hydrogen gas production method, and steel production method  2018年03月08日
    Adachi Shuichiro, KITAGAWA Masaki, WATANABE Seiichi, ZHANG Lihua, OKINAKA Noriyuki
  • 特願WO 2018/043351 A1:Nanocrystal production method, and steel production method  2018年03月08日
    Adachi Shuichiro, KITAGAWA Masaki, WATANABE Seiichi, ZHANG Lihua, OKINAKA Noriyuki
  • 特願2016-171253:水素ガスの製造方法、及び鋼の製造方法  
    足立修一郎, 北川雅規, 渡辺精一, 張麗華, 沖中憲之, 高井大
  • 特願2016-171252:ナノ結晶の製造方法、及び鋼の製造方法  
    足立修一郎, 北川雅規, 渡辺精一, 張麗華, 沖中憲之, 高井大

共同研究・競争的資金等の研究課題

  • 新次元の超軽量ハイエントロピー合金等の研究開発
    独立行政法人新エネルギー・産業技術総合開発機構:エネルギー・環境新技術先導プログラム
    研究期間 : 2017年 -2020年 
    代表者 : 加藤 隆彦
  • 水中光照射利用による鉄ナノ酸化物生成と水素製造
    北海道ガス:大学研究支援制度
    研究期間 : 2018年04月 -2019年03月 
    代表者 : 張 麗華

教育活動情報

主要な担当授業

  • 材料科学基礎英語
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 材料科学,英語,listening,プレゼンテーション
  • 材料工学実験Ⅰ
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 機器分析、分極曲線、電解採取、金属組織、状態図、強度、温度計測、鋼の熱処理、加工、拡散現象、密度、電子顕微鏡
  • 材料工学実験Ⅱ
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 熱分析法、腐食と防食、流動と伝熱、熱処理、塑性加工、電子顕微鏡、拡散反応


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