2011 Fiscal Year Final Research Report
Anti-Frenkel defect analysis of apatite-type lanthanum silicate
| Project/Area Number |
21560774
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
KOBAYASHI Kiyoshi 独立行政法人物質・材料研究機構, 先端材料プロセスユニット, 主任研究員 (90357020)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 酸素イオン伝導体 |
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| Research Abstract |
Effect of an oxygen ionic conductive properties on the anti-Frenkel type defect equilibrium have been investigated for apatite-type lanthanum silicate. Apatite-type lanthanum silicate is found to be an ideal oxygen ionic conductor in wide oxygen partial pressure and temperature region. On the other hand, the anti-Frenkel defect concentration is strongly influenced by the substitution of neodymium to lanthanum even which components had very similar chemical properties. Based on these results, the defect equilibrium in the apatite-type lanthanoid silicate can't be understood by classical defect chemical theory.
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