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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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高温质子导体Ba3Ca1.18Nb1.82O9-δ的制备和表征
, PP. 345-350
Keywords: 高温质子导体,Ba3Ca1.18Nb1.82O9-δ,球磨,致密度,导电性
Abstract:
对经6与10h球磨的BaCO3,CaCO3和Nb2O5的混合粉体进行冷压成型,1400℃/10h高温烧结后,获得了不同致密度的Ba3Ca1.18Nb1.82O9-δ样品.激光粒度、DSC--TG和SEM分析表明,适度延长球磨时间,可降低合成温度,细化粉体粒度,提高样品的致密度.电化学阻抗谱测试表明,在300---800℃温度范围内,6和10h球磨粉体制备的烧结样品总电导率与温度的关系符合Arrhenius方程,电导激活能分别为0.84和0.68eV.提高样品的致密度是降低电导激活能、提高中低温(300---600℃)导电性能的有效途径.
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