BaCe_(0.5)Zr_(0.4)Y_(0.1)O_(3-α)的溶胶-凝胶法制备及其电性能  

Preparation of BaCe_(0.5)Zr_(0.4)Y_(0.1)O_(3-α) by Sol-Gel Method and Its Electrical Properties

作　　者：汪洁[1] 丁伟中[1] 方建慧[2] 朱冬冬[2] 吴敏艳[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]上海大学理学院,上海200346

出　　处：《中国稀土学报》2005年第4期449-454,共6页Journal of the Chinese Society of Rare Earths

基　　金：上海市教委重点基金资助项目(01AZ01)

摘　　要：采用溶胶-凝胶法,以低于固相合成法150~250℃的温度进行烧结,分别制备了BaCe0.9Y0.1O3-α和BaCe0.5Zr0.4Y0.1O3-α固体电解质。应用AUTOLABPGSTA30型电化学工作站测定了两种电解质在不同温度下的阻抗谱,在350~800℃范围内电导率分别为1.62×10-4~6.43×10-3S.cm-1,2.52×10-5~3.73×10-3S.cm-1,电导激活能分别为0.54和0.84eV。同时用高温固相合成法合成了BaCe0.9Y0.1O3-α质子导体,在相同条件下其电导率为1×10-4~4×10-3S.cm-1,激活能为0.50eV。实验结果表明:用溶胶-凝胶法得到的材料在烧结温度低于固相合成法150~250℃的情况下,制备出的样品电导率高;对于同一质子导体BaCe0.9Y0.1O3-α,用Zr代替部分Ce,固体电解质的电导率明显降低。A precursor of BaCe_(0.5)Zr_(0.4)Y_(0.1)O_(3-α) electrolytes was synthesized by the sol-gel method and sintered at temperature which were 150～250 ℃ lower than that by solid state reaction. The AC impedance spectrums of electrolytes were measured by AUTOLAB PGSTA30 electrochemical measuring device at different temperatures. The conductivities of the electrolytes are 1.62×10^(-4)～6.43×10^(-3), 2.52×10^(-5)～3.73×10^(-3) S·cm^(-1) in the temperature range of 350～800 ℃. The activity energies are 0.54 and 0.84 eV...

关 键 词：BaCe0.9-xZrxY0.1O3-α 固体电解质 溶胶-凝胶法 电导率 激活能 固相合成法 稀土 

分 类 号：O614.3[理学—无机化学]