著者

Takao ESAKA Salmie Suhana Binti Che Abdullah

出版者

The Electrochemical Society of Japan

雑誌

Electrochemistry (ISSN:13443542)

巻号頁・発行日

vol.78, no.11, pp.907-911, 2010-11-05 (Released:2012-03-26)

参考文献数

26

被引用文献数

2 4

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In order to find a new type of oxide ion conductor, the electrical conduction was measured in the substituted perovskite-type oxides. In the present case, LaYO3 was used as a based material with an orthorhombic and comparatively large unit cell, and a novel substitution method was introduced to intend to increase the concentration of oxide ions, e.g., LaY1−xZrxO3+x/2. As a result, the LaYO3-based perovskite-type solid solution was found to be formed, where the enhanced oxide ion conduction was observed as compared with that of the based material. A typical sample was LaY0.95Zr0.05O3.025, the ionic conduction of which was 1.2×10−2 S cm−1 at 1000°C. Another substitution method of La1−xZrxYO3+x/2 resulted in the analogous result. Considering these results and the further structural and density measurements, the charge carriers in these phases were expected to be due to interstitial oxide ions.