| Project/Area Number |
20760446
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
YASHIRO Keiji Tohoku University, 多元物質科学研究所, 講師 (20323107)
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| Project Period (FY) |
2008 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | プロトン導電体 / 中温形燃料電池 / ペロブスカイト酸化物 / 拡散係数 / イオン導電率 / ペロブスカイト型酸化物 |
|---|
| Research Abstract |
Chemical diffusion coefficients, D_<chem>, of Sr(Zr,Y)O_3、Ba(Ce,Y)O_3 were determined by conductivity relaxation method. Dchem are essentially independent of partial pressures of hydrogen and water. Self diffusion coefficients of oxygen vacancy and hydrogen were estimated from D_<chem> and defect concentration. As a result, the self diffusion coefficients seem to be independent of the gas partial pressures. These results are supported by isotope diffusion experiments.
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