Study on Pressure Sintering of beta-FeSi_2 with highly Efficient Thermoelectric Properties

高效热电性能β-FeSi_2的压力烧结研究

基本信息

  • 批准号:
    06555266
  • 负责人:
  • 金额:
    $ 8.64万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
  • 财政年份:
    1994
  • 资助国家:
    日本
  • 起止时间:
    1994 至 1996
  • 项目状态:
    已结题

项目摘要

beta-Fe_<1-x>Ru_xSi_2 solid solution was synthesized by solid state reaction at 1100゚C for 48h and subsequect annealing at 850゚C for 168h in an evacuated silica tube. Single phase solid solution was obtained in the composition range 0*x*0.1. The thermal stability range of the beta-phase extended to higher temperature region by partial substitution of Ru atom. The thermoelectric properties of Cr or Co-doped B-Fe_<1x>Ru_xSi_2 strongly depend on the sinthering conditions. The samples with optimum thermoelectric properties are obtaind by high-pressure sintering at 3 GPa and 800゚C for 1h. Seebeck coefficient for X-axis perpendicular to applied pressure was superior to that for Z-axis parallel to applied pressure. The anisotropy of electrical conductivity was opposite tendency comparing with the results of Seebeck coefficient. The optimum compositions are found to be Fe_<0.92>Ru_<0.05>Cr_<0.03>Si_2 and Fe_<0.92>Ru_<0.05>Co_<0.03>Si_2 for p-type and n-type materials, respectively. The power factors (sigmaalpha_2) of these materials are higher than that of beta-FeSi_2 based materials. The mechanism for the anisotropy of thermoelectric properties was examined. As a result, it is considered that the model of oriented-grain microstructure is most possible factor to introduce the anisotropy of thermoelectric properties. In this model, a very few amounts of impurities (FeSi, amorphous Si etc.) were located at grain boundaries. Both oriented-grains and impurities in microstructure play an important role to introduce the anisotropy of thermoelectric properties.
用1100゚C固相反应48h,然后在真空硅管中850゚C热处理168h,合成了β-Fe_&lt;1-x&gt;Ru_xSi_2固溶体。在成分为0*x*0.1的范围内,获得了单相固溶体。Ru原子的部分取代使β相的热稳定性范围向高温区扩展。铬或钴掺杂的B-Fe_&lt;1x&Gt;Ru_xSi_2的热电性能强烈地依赖于晶化条件。在3 GPa800゚C下高压烧结1h,可获得热电性能最佳的样品。垂直于外压的X轴的Seebeck系数优于平行于外压的Z轴的Seebeck系数。电导率的各向异性与Seebeck系数的结果相反。对于p型和n型材料,最佳成分分别为Fe_&lt;0.92&gt;Ru_&lt;0.05&gt;Cr_&lt;0.03&gt;Si_2和Fe_&lt;0.92&gt;Ru_&lt;0.05&gt;Co_&lt;0.03&gt;Si_2。这些材料的功率因数(σα_2)高于β-FeSi_2基材料。对热电性能各向异性的机理进行了探讨。因此,取向晶微结构模型是引入热电性能各向异性的最有可能的因素。在这个模型中,只有极少量的杂质(FeSi、非晶态Si等)。位于晶界。取向晶和显微组织中的杂质都是导致热电性能各向异性的重要因素。

项目成果

期刊论文数量(9)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Takizawa: "Preparation and thermoelectric properties of β-Fe_<1-x>Ru_xSi_2" Journal of Materials Science. 30. 4199-4203 (1995)
H. Takizawa:“β-Fe_<1-x>Ru_xSi_2 的制备和热电性能”材料科学杂志 30. 4199-4203 (1995)。
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M.Shimada: "Synthesis and thermoelectric properties of β-Fe_<1-X>Ru_XSi_2" Proceedings of 12th International Conference on Thermoelectric. 299-302 (1994)
M. Shimada:“β-Fe_<1-X>Ru_XSi_2 的合成和热电性能”第 12 届国际热电会议论文集 299-302 (1994)。
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H.Takizawa,P.F.Mo,T.Endo,M.Shimada: "Synthesis and thermoelectric properties of β-Fe_<1-x>Ru_xSi_2" Proc.12th Inter.Conf.on Thermoelectrics. 299-302 (1993)
H.Takizawa、P.F.Mo、T.Endo、M.Shimada:“β-Fe_<1-x>Ru_xSi_2 的合成和热电性能”Proc.12th Inter.Conf.on Thermoelectrics(1993 年)。
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    0
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滝沢博胤、山本賢太、遠藤忠、島田昌彦: "超高圧焼結により作製したβ-FeSi_2系熱電材料の微細構造と熱電特性の異方性" 粉体粉末冶金雑誌. 44. 39-43 (1997)
Hirotane Takizawa、Kenta Yamamoto、Tadashi Endo、Masahiko Shimada:“超高压烧结制备的β-FeSi_2基热电材料的微观结构和热电性能”粉末冶金杂志44. 39-43(1997)。
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    0
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H.Takizawa,P.F.Mo,T.Endo,M.Shimada: "Preparation and thermoelectric properties of β-Fe_<1-x>Ru_xSi_2" Journal of Materials Science. 30. 4199-4203 (1995)
H.Takizawa、P.F.Mo、T.Endo、M.Shimada:“β-Fe_<1-x>Ru_xSi_2 的制备和热电性能”材料科学杂志 30. 4199-4203 (1995)。
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SHIMADA Masahiko其他文献

SHIMADA Masahiko的其他文献

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{{ truncateString('SHIMADA Masahiko', 18)}}的其他基金

Altered brain volume in neuropathic pain patients
神经性疼痛患者的脑容量改变
  • 批准号:
    16K11743
  • 财政年份:
    2016
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of the method of treatment for neuropathic pain -Basic study of the effect of iontophoresis-
神经性疼痛治疗方法的开发-离子电渗疗法效果的基础研究-
  • 批准号:
    22592253
  • 财政年份:
    2010
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A Study on the intravenous sedation with propofol - Function of Swallowing, BIS monitor and blood concentration of propofol -
异丙酚静脉镇静研究-吞咽功能、BIS监测及异丙酚血药浓度-
  • 批准号:
    16591997
  • 财政年份:
    2004
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A Study on the intravenous sedation with propofal - BIS monitor and blood concentration of propofol
丙泊酚静脉镇静-BIS监测及丙泊酚血药浓度研究
  • 批准号:
    13672095
  • 财政年份:
    2001
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Synthesis and Characterization of Multi-Component Metal Nitrides
多组分金属氮化物的合成与表征
  • 批准号:
    13450263
  • 财政年份:
    2001
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Gallium Nitride Single Crystal Growth by Flux Method
助熔剂法生长氮化镓单晶
  • 批准号:
    12555175
  • 财政年份:
    2000
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Synthesis and Crystal Structure of Rare-Earth Calcium Silicate
稀土硅酸钙的合成及晶体结构研究
  • 批准号:
    10450238
  • 财政年份:
    1998
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Study on Fabrication of high Luminous Materials for high Performance Display Devices
高性能显示器件用高发光材料的制备研究
  • 批准号:
    09555187
  • 财政年份:
    1997
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Stress-Induced Phase Transformation of Rare Earth Aluminates
稀土铝酸盐应力诱导相变研究
  • 批准号:
    07455262
  • 财政年份:
    1995
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Fabrication of Intense Fluorescent Oxides doped with Rare Earths
稀土掺杂强荧光氧化物的制备研究
  • 批准号:
    05453073
  • 财政年份:
    1993
  • 资助金额:
    $ 8.64万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)

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Surface characterization of iron silicides by energy tunable X-ray excited photoelectron spectroscopy
能量可调 X 射线激发光电子能谱表征硅化铁的表面
  • 批准号:
    21560765
  • 财政年份:
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Growth Kinetics of Iron Silicides in the Fe/Si Bulk Reaction Diffusion Couple and Thermo-Electric Property of FeSi_2 Formed by This Method.
Fe/Si本体反应扩散偶中硅化铁的生长动力学及该方法形成的FeSi_2的热电性能。
  • 批准号:
    09650722
  • 财政年份:
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  • 资助金额:
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  • 项目类别:
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