PROTONIC CONDUCTION IN YTTRIUM-SUBSTITUTED HYDROXYAPATITE CERAMICS AND THEIR APPLICABILITY TO H2-O2 FUEL-CELL

被引：31

作者：

YAMASHITA, K ^{[1
]}

OWADA, H ^{[1
]}

UMEGAKI, T ^{[1
]}

KANAZAWA, T ^{[1
]}

KATAYAMA, K ^{[1
]}

机构：

[1] CHICHIBU CEMENT CO LTD,KUMAGAYA,SAITAMA 360,JAPAN

来源：

SOLID STATE IONICS | 1990年 / 40-1卷

关键词：

D O I：

10.1016/0167-2738(90)90153-I

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A ceramic proton conductor was obtained in the solid solutions of yttrium-substituted oxyhydroxyapatite [Ca10-xYx](PO4)6[(OH)2-x-2yOx+y□y]. Using the hydrogen concentration cells, we have confirmed that the specimens with a composition of x{slanted equal to or less-than}0.65 have the protonic transference number (ti) of unity, while the values of ti of specimens with 0.65<x<1 were smaller than unity. The conduction properties were also dependent on the composition of the apatites. At x{geometrically equal to}0.65, the conductivity (σ) showed the maximum value (5×10-4 S·cm-1 at 800°C) in the relationship between σ and x, while the activation energy was the minimum (about 1.0 eV) at the corresponding x. The applicability of the proton conductive apatite to a fuel cell was also discussed. © 1990.

引用

页码：918 / 921

页数：4

共 7 条

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