• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Synthesis of perovskite oxide thin films showing rattling behavior and their application to thermoelectric conversion materials

Research Project

Project/Area Number 16K14092
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Inorganic industrial materials
Research InstitutionKyoto University

Principal Investigator

Tanaka Katsuhisa  京都大学, 工学研究科, 教授 (80188292)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords酸化物 / ペロブスカイト型構造 / 高圧合成 / 構造解析 / 熱分解 / 熱分析 / トポケミカル反応 / 反応エンタルピー / ペロブスカイト / 光第二高調波発生 / 空間群 / イオン半径 / 薄膜 / 電気伝導 / ラットリング / 熱電材料
Outline of Final Research Achievements

By utilizing the solid-state reaction at elevated temperature and pressure, we succeeded in synthesizing new metastable oxides, CuNbO3 and CuTaO3, which possess the perovskite structure. The second-harmonic generation measurements reveal that those compounds have a polar structure. It was found that the resultant compounds undergo thermal decomposition reaction to form both CuO and A-site ordered quadruple perovskite oxides with some of the A-sites having cation vacancies. The reaction enthalpy was evaluated by using the thermal analysis. We also examined the thermal decomposition of CuNbO3 obtained by the solid-state reaction at ambient pressure and compared the thermally induced phase transition with the above-mentioned metastable CuNbO3. The present thermal decomposition reaction is a topochemical reaction with the elimination of cations, which has been little reported thus far.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2019-03-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi