摘要
用直接合成法制备了Ｌａβ－Ａｌ２Ｏ３固体电解质．利用阻抗谱测定其电导率，研究了电导率与温度及掺杂物含量的关系．在４５０—１０００℃温度下电导率为１０－６—１０－２Ｓ·ｃｍ－１，活化能为０．８９ｅＶ．用Ｗａｇｎｅｒ极化电池法测定了电子电导率，在５００—９００℃温度下电子电导率为１０－７—１０－５Ｓ·ｃｍ－１，活化能为０．７４ｅＶ．电子迁移数小于０．
Laβ-Al2O3 solid electrolytes were prepared by the direct synthesis method. The conductivity was measured using AC impedence spectrum. The dependence of the conductivity of Laβ-Al2O3 upon the temperature and the dopant concentration in the electrolytes was studied. The measured magnitudes of conductivities are in the range of 10-6—10-2S·cm-1, the value of the activation energy is 0.89eV from 450℃ to 1000℃. The electronic conductivity measurements were performed using the Wagner measurement technique under inverse polarization conditions. The measured magnitudes of electronic conductivities are in the range of 10-7—10-5S·cm-1, the value of the activation energy is 0.74eV from 500℃ to 900℃. The electronic transference number is less than 0.01.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1998年第2期217-222,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
关键词
固体电解质
镧
氧化铝
导电性
电解质
solid electrolyte, β-alumina doped with lanthanum, conductivity, electronic transference number, electronic conductivity
