AC AND DC CONDUCTIVITY STUDIES OF PELLETIZED 12-TUNGSTOPHOSPHORIC ACID AND 12-TUNGSTOSILICIC ACID HEXAHYDRATES

被引：35

作者：

SLADE, RCT ^{[1
]}

PRESSMAN, HA ^{[1
]}

SKOU, E ^{[1
]}

机构：

[1] ODENSE UNIV, DEPT CHEM, DK-5230 ODENSE, DENMARK

来源：

SOLID STATE IONICS | 1990年 / 38卷 / 3-4期

关键词：

D O I：

10.1016/0167-2738(90)90422-N

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：

Ionic conduction in pelletised 12-tungstophosphoric acid and 12-tungstosilicic acid hexahydrates has been examined using ac and dc techniques. The studies definitively assign a protonic conduction mechanism, with evidence for conduction via crystallite surfaces. With blocking electrodes, σ (298 K) values are ≈ 10-4 S cm-1 with Arrhenius-type temperature dependences. With reversible electrodes, conductivities increase with increasing relative humidity of flow gas. dc conductivities are slightly lower than ac values because of electrode polarisation. © 1990.

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页码：207 / 211

页数：5

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