BaCe_(0.9)Ca_(0.1)O_(3-α)的溶胶-凝胶法合成及中温质子导电性  

Synthesis of BaCe_(0.9)Ca_(0.1)O_(3-α) by sol-gel route and its proton conduction at intermediate temperature

作　　者：刘进伟[1] 李亚东[1] 王文宝[1] 王洪涛[1] 马桂林[1] 

机构地区：[1]苏州大学材料与化学化工学部江苏省有机合成重点实验室,江苏苏州215123

出　　处：《苏州大学学报（自然科学版）》2010年第2期79-83,共5页Journal of Soochow University(Natural Science Edition)

基　　金：国家自然科学基金(20771079)

摘　　要：在较低温度下煅烧（1050℃）和烧结（1500℃）由溶胶-凝胶法制得的前驱体而获得致密的钙钛矿型BaCe0.9Ca0.1O3-α陶瓷样品,分别比通常高温固相法的煅烧温度（1400℃）和烧结温度（1665℃）降低了350℃和165℃.采用交流阻抗谱、氢浓差电池及氢的电化学透过（氢泵）等方法研究了样品的质子导电性.结果表明,样品在300℃~600℃的氢气气氛中几乎为纯的质子导体,在600℃时的质子电导率为1.22×10-4S.cm-1.Dense BaCe0.9Ca0.1O3-α ceramic sample with a single phase of perovskite structure has been obtained by heat-treating the precursor prepared from a sol-gel route under lower temperature.The calcining and sintering temperatures（1 050 ℃ and 1 500 ℃） were lower by 350 ℃ and 165 ℃ than those（1 400 ℃ and 1 665 ℃） of traditional high-temperature solid-state reaction method.The proton conduction was investigated by AC impedance spectra,hydrogen concentration cell and electrochemical hydrogen permeation（hydrogen pumping） methods.The sample was almost a pure proton conductor at 300 ℃~600 ℃ in hydrogen atmosphere and the proton conductivity was 1.22×10-4S·cm-1 at 600 ℃.

关 键 词：BACEO3 质子导体 溶胶-凝胶法 交流阻抗谱 氢泵 

分 类 号：O611.61[理学—无机化学]