2010 Fiscal Year Final Research Report
Cation substitution, crystal structures, and thermoelectric properties of layered perovskite-type barium stannates
| Project/Area Number |
20550181
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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 |
Inorganic industrial materials
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| Research Institution | Kochi National College of Technology |
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Principal Investigator |
YASUKAWA Masahiro Kochi National College of Technology, 物質工学科, 准教授 (10332082)
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| Co-Investigator(Renkei-kenkyūsha) |
UEDA Kazushige 九州工業大学, 大学院・工学研究科, 准教授 (70302982)
YANAGI Hiroshi 山梨大学, 大学院・医学工学総合研究部, 准教授 (30361794)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 層状ペロブスカイト / スズ酸バリウム / 熱電特性 |
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| Research Abstract |
Preparation of cation-substituted solid solutions with electroconductivity was performed for layered perovskite-type barium stannates Ba_<n+1>SnnO_<3n+1> (n=integer), and the possibility as thermoelectric materials was investigated by estimation of thermoelectric properties at high temperatures for the sintered ceramics. The solid solutions with La or Sb for Ba_2SnO_4 (n=1) and Ba_3Sn_2O7 (n=2) were found to be all insulators. While for BaSnO_3 (n=∞), N-type Ba_<1-x>La_xSnO_3 (x=0.005) ceramic showed relatively high values of a power factor of 4.3×10^<-4>Wm^<-1>K^<-2> and a dimensionless figure of merit ZT of 0.098 at 1073K. The power factors for P-type BaSn_<1-x>Co_xO_3 ceramics, which were needed for device application, were also elucidated.
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