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气相法制备Na-β″-Al2O3固体电解质
作者:    郑培毓 李凤友   
单位:(辽宁科技大学高温材料与镁资源工程学院 辽宁 鞍山 114051) 
关键词:纳米-η-氧化铝 钠-β″-氧化铝 气相反应 导电性能 
分类号:TQ174
出版年,卷(期):页码:2019,47(9):0-0
DOI:
摘要:

 以纳米?-Al2O3为原料、Na2CO3、Li2CO3和MgO为添加剂,采用气相法制备Na–β″-Al2O3固体电解质。结果表明:纳米?-Al2O3活性高、尺寸小,1 400 ℃热压烧结制备出相对密度为99.2%的高致密性氧化铝陶瓷。MgO的掺杂在氧化铝烧结过程中形成尖晶石相,有利于加快气相法的进程,适量MgO的加入有利于提高电解质中β″-Al2O3含量,减小试样的晶界电阻,提高试样的离子电导率;过多的MgO掺杂量造成试样致密性下降,增大了试样的晶界电阻,导致试样的离子电导率降低。当MgO的加入量为1.0%时,试样在300 ℃时的离子电导率最大,为0.164 S•cm–1。

基金项目:
国家自然科学基金(51702144)
作者简介:
参考文献:

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