氧化锆基固体电解质离子导电的基本原理  

Mechanism of Ionic Conduction of ZrO2 Base Solid Electrolyte

作　　者：林振汉[1] 张玲秀[1] 

机构地区：[1]上海大学,上海200072

出　　处：《热处理》2009年第5期6-10,共5页Heat Treatment

摘　　要：立方ZrO2具有高的离子传导性能,近年来被广泛用作固体氧化物燃料电池的电解质。固体中离子电导率决定于载体浓度(密度)和迁移率,而固态离子的传导和扩散则决定于固体中的缺陷结构。ZrO2的传导性能与掺杂剂的组成、晶体结构、晶粒大小和温度有关。文中着重论述了作为电解质的稳定立方ZrO2中O2-离子传导的作用原理和掺杂机制。Cubic ZrO2 provides an excellent ionic conduction and is extensively used as electrolyte of solid oxide fuel cell （SOFC） in recent years. The ion electrical conductivity in solid is dependent on both carrier concentration （density） and mobility, while the conduction and diffusion of solid state ions are dependent on the structure of defects in solid. The conductibility of ZrO2 is related to the composition, crystal structure and grain size of dopant as well as temperature. The action principle of O2^- ion conduction in stabilized cubic ZrO2 and the doping mechanism were emphatically depicted.

关 键 词：电导率 缺陷 离子迁移率 固体电解质 立方ZrO2 

分 类 号：TQ134.1[化学工程—无机化工] TB383[一般工业技术—材料科学与工程]