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OALib Journal期刊
ISSN: 2333-9721
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sol-gel法制备la9.33si6o26及其导电性能
, PP. 30-34
Keywords: solgel法,磷灰石型电解质,正交设计,电导率
Abstract:
通过溶胶凝胶(solgel)法制备磷灰石型固体电解质la9.33si6o26,考察solgel过程中水硅摩尔比(n(h2o)／n(si))、醇硅体积比（v(c2h5oh)／v(si)）和ph等制备参数对溶胶性质的影响,并采用正交设计确定了最佳制备条件。x线衍射（xrd）分析显示,在n(h2o)／n(si)=10、v(c2h5oh)／v(si)=5、ph=2的最佳制备条件下可获得单相的磷灰石型晶体。试样在1550℃烧结4h后的相对密度为93.9％,其800℃时的氧离子电导率高达5.50×10-3s／cm,电导活化能为0.86ev,室温至800℃测得试样的热膨胀系数为9.3×10-6k-1,与普遍使用的电极材料之间具有较好的热匹配性。
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