PROTON CONDUCTIVITY AND HUMIDITY-SENSING PROPERTIES AT HIGH-TEMPERATURE OF THE NASICON-BASED COMPOSITE-MATERIAL HZR2P3O12.ZRP2O7

被引：26

作者：

FENG, SH ^{[1
]}

GREENBLATT, M ^{[1
]}

机构：

[1] RUTGERS UNIV,DEPT CHEM,PISCATAWAY,NJ 08854

来源：

CHEMISTRY OF MATERIALS | 1993年 / 5卷 / 09期

关键词：

D O I：

10.1021/cm00033a016

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：

Proton conductivity and humidity-sensing characteristics of a composite material, HZr2P3O12.ZrP2O7, were investigated by an ac impedance technique in the temperature range 350-600-degrees-C in dry He, moist He, H-2, and O2 atmosphere, respectively. The conductivity of HZr2P3O12-ZrP2O7 increases linearly with increasing relative humidity or hydrogen gas concentration at approximately 450-degrees-C. The increase of conductivity of HZr2P3O12-ZrP2O7 with increasing water vapor or hydrogen gas pressure is consistent with the reaction H2O(gas) --> H+ + 1/2O2 + 2e- occurring at the electrode-electrolyte interface. The real part of the complex impedance as a function of relative humidity or H-2 gas pressure is independent of frequency in the range 10-20 Hz. These results indicate that the HZr2P3O12.ZrP2O7 CoMposite ceramic is applicable for humidity and H-2 gas sensing.

引用

页码：1277 / 1282

页数：6

共 13 条

[1] CRYSTALLINE INSOLUBLE SALTS OF POLYBASIC METALS .2. SYNTHESIS OF CRYSTALLINE ZIRCONIUM OR TITANIUM PHOSPHATE BY DIRECT PRECIPITATION [J].