Phase transitions and electrical properties of CsH(SO4)(0.76)(SeO4)(0.24) mixed crystals

被引：11

作者：

Gargouri, M

Mhiri, T

Bouachir, M

Reau, JM

Senegas, J

Daoud, A

机构：

[1] UNIV SFAX,LAB ETAT SOLIDE,SFAX 3038,TUNISIA

[2] ICMCB,CNRS,CHIM SOLIDE LAB,F-33600 PESSAC,FRANCE

来源：

SOLID STATE IONICS | 1997年 / 100卷 / 3-4期

关键词：

mixed crystal; phase transition; proton conductors;

D O I：

10.1016/S0167-2738(97)00358-5

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：

The study by X-ray diffraction, calorimetry, vibrational and impedance spectroscopy of CsH(SO4)(0.76)(SeO4)(0.24) new solid solution is presented. Crystals of this composition undergo two phase transitions at T = 333 and 408 K. The last one at 408 K is a superionic-protonic transition (SPT) related to a rapid [HS(Se)O-4(-)] reorientation and fast H+ diffusion. A sudden jump in the conductivity plot confirms the presence of this transition. Above 408 K, this high temperature phase is characterized by high electrical conductivity (7 x 10(-3) Omega(-1) cm(-1)) and low activation energy (E-a < 0.3 eV).

引用

页码：225 / 232

页数：8

共 29 条

[1] THE DETERMINATION OF HOPPING RATES AND CARRIER CONCENTRATIONS IN IONIC CONDUCTORS BY A NEW ANALYSIS OF AC CONDUCTIVITY [J].