采用固态反应法制备了Sr、Mg掺杂的LaGaO3固体电解质材料,研究了不同Sr、Mg掺杂量对LSGM材料的导电性的影响.结果表明,随Sr、Mg掺杂量的增加,LSGM材料的电导率开始增加,达到最大值后,逐步降低,LSGM1520和LSGM2015具有最高电导率,此时材料由单一的立方相组成;LSGM材料的离子电导率随测试温度的升高而增加,ln(σT)与1/T关系曲线呈现两段不同斜率的直线,交点温度为T*,当测试温度低于T*时,氧离子迁移激活能大于温度高于T*的激活能.
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