2009 Fiscal Year Final Research Report
Defect structure and ion transport in Perovskite-type proton conductors
| Project/Area Number |
20760446
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Inorganic materials/Physical properties
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
YASHIRO Keiji Tohoku University, 多元物質科学研究所, 講師 (20323107)
|
|---|
| Project Period (FY) |
2008 – 2009
|
| 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 |
|---|
| 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.
|
Research Products
(8 results)
