| Mechanical Activation-Assisted Synthesis of Nd-BaPbO3 |
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| 引用本文： | 刘心宇,万仁勇,曾中明,成均. Mechanical Activation-Assisted Synthesis of Nd-BaPbO3[J]. 中国稀土学报(英文版), 2003, 21(4): 440-443 |
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| 作者姓名： | 刘心宇 万仁勇 曾中明 成均 |
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| 作者单位： | Research Center for Materials Science and Engineering，Institute of Materials Science and Engineering，Institute of Materials Science and Engineering，Research Center for Materials Science and Engineering Guilin University of Electronic Technology，Guilin 541004，China，Institute of Materials Science and Engineering，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Guilin University of Electronic Technology，Guilin 541004，China |
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| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina (5 0 2 72 0 15 ) |
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| 摘 要： | ThesimpleperovskiteBaPbO3hasbeenreportedtohavehighelectricalconductivityandorthorhombicsymmetry[1～ 3] .Matherssetal .[4 ] reportedthehighconductivityofthismaterialoriginatesfromtheforma tionofabroadbandduetomixingoflead 6sandoxy gen 2pstates .Substitutionand/ornonstoichiometryinBaPbO3induceinterestingelectricalproperties .Forexample ,Sleightetal .[3] foundthesuperconductivityofBaPb1-xBixO3intherangeofx =0 .0 5～ 0 .3in1975 .IncreasingattentionhasbeenfocusedonBaP bO3asacomponentofthemate…
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| 关 键 词： | 钕 机械活化 合成 BPO 铅酸钡 稀土 |
Mechanical Activation-Assisted Synthesis of Nd-BaPbO3 |
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| Liu Xinyu ,,Wan Renyong ,Zeng Zhongming ,Cheng Jun. Mechanical Activation-Assisted Synthesis of Nd-BaPbO3[J]. Journal of Rare Earths, 2003, 21(4): 440-443 |
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| Authors: | Liu Xinyu Wan Renyong Zeng Zhongming Cheng Jun |
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| Affiliation: | Liu Xinyu 1,2*,Wan Renyong 2,Zeng Zhongming 2,Cheng Jun 1 |
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| Abstract: | Fifty hours of mechanical activation of mixed oxides at room temperature did not trigger the formation of Nd-BaPbO3 (BPO) in the existence of excessive PbO, but decreased the synthesis temperature of the BPO. The crystalline of the activation-derived perovskite BPO phase was further established when the activated mixture was subjected to calcination at 650 ℃. The perovskite phase was sintered to a density of 98% of theoretical value at 980 ℃ for 2 h. The sintered BPO with 0.1% Nd doped exhibits a resistivity of 2×10-4 Ω*cm and an excellent PTC effect at Curie temperature of 750 ℃. |
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| Keywords: | material science BaPbO 3 mechanical activation rare earths |
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