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La_(2/3)Ca_(1/3)MnO_3:Ag_(0.4)与La_(2/3)Ba_(1/3)MnO_3:Ag_(0.4)的制备及其性能研究 被引量：1

Properties of La_(2/3)Ca_(1/3)MnO_3:Ag_(0.4) and La_(2/3)Ba_(1/3)MnO_3:Ag_(0.4) Composite Fabricated by Coprecipitation
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摘要 采用化学共沉淀法合成制备了Ag掺杂摩尔百分比为0.4的La2/3Ca1/3MnO3∶Ag0.4(LCMO∶Ag0.4)、La2/3Ba1/3MnO3∶Ag0.4(LBMO∶Ag0.4)多晶复合材料,通过XRD和R-T分别对两种材料的结构和性能进行测试分析。实验结果表明:所得样品均为正交晶系钙钛矿结构;LCMO∶Ag0.4的金属-绝缘转变温度(Tp=280.2 K)比LBMO∶Ag0.4要高(Tp=256.8 K);LCMO∶Ag0.4样品的电阻值比LBMO∶Ag0.4要小两个数量级;LCMO∶Ag0.4的TCR最大值为28%,要远远高于LBMO∶Ag0.4的TCR最大值(0.5%)。 La2/3Ca1/3MnO3∶Ag0.4（LCMO∶Ag0.4） and La2/3Ba1/3MnO3∶Ag0.4（LBMO∶Ag0.4） composite was prepared successfully by co-precipitation method.The microstructure and performance of La2/3Ca1/3MnO3 ∶Ag0.4 and La2/3Ba1/3MnO3 ∶Ag0.4 were investigated by X-ray diffraction and R-T measurement.The results show that,the metal-insulation transition temperature（Tp） of LCMO∶Ag0.4 at 280.2 K is higher than LBMO∶Ag0.4 sample at 256.8 K.The resistivity of LCMO∶Ag0.4 is lower 2 orders than LBMO∶Ag0.4 sample.The temperature coefficient of resistance（TCR） of LCMO∶Ag0.4 is 28%,which is higher than LBMO∶Ag0.4 sample as 0.5%.
作者 张少春 刘翔 陈清明 晏益志 曹明刚
机构地区 昆明理工大学材料科学与工程学院
出处 《热加工工艺》 CSCD 北大核心 2012年第18期5-7,共3页 Hot Working Technology
基金 国家自然科学基金资助项目(50974066) 云南省自然科学基金资助项目(2009ZC013M)
关键词 La2/3Ca1/3MnO3∶Ag0.4 La2/3Ba1/3MnO3∶Ag0.4 化学共沉淀 电阻温度系数 La2/3Ca1/3MnO3 ∶Ag0.4 La2/3Ba1/3MnO3 ∶Ag0.4 coprecipitation coefficient of temperature resistance
分类号 TB321 [一般工业技术—材料科学与工程]
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参考文献15

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二级参考文献18

共引文献8

同被引文献18

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热加工工艺
2012年 第18期

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