2Sn2O7; Electrical contact material; Resistivity; hot extrusion process"/> 2Sn2O7 electrical contact composites were prepared by high-energy ball milling and sintering process. The effects of sintering temperature, sintering time and surface modifier on the morphology and phase of La2Sn2O7 powder were investigated, and the physical properties of Ag- La2Sn2O7 were analyzed. The results showed that La2Sn2O7 powder with mesoporous structure was obtained with sintering temperature of 920℃, 2h. With the pressure of 1200MPa and sintering temperature of 900℃, 6h, The properties of Ag- La2Sn2O7 showed good electrical resistivity and hardness. After the hot extrusion process, Ag- La2Sn2O7 electrical contact material had undergone large plastic deformation, in this process, the formation of fiber-like structured distribution of the particles observed contributed to obtain lower resistivity."/>

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Preparation of Mesoporous La2Sn2O7 Powder and Its application in Ag based electrical Contact Materials
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Zhejiang-California International Nanosystems Institute,Zhejiang University,Zhejiang-California International Nanosystems Institute,Zhejiang University,Zhejiang-California International Nanosystems Institute,Zhejiang University,Zhejiang-California International Nanosystems Institute,Zhejiang University,Wenzhou HongFeng Electrical Alloy Co,Ltd Wenzhou,Zhejiang-California International Nanosystems Institute,Zhejiang University,Zhejiang-California International Nanosystems Institute,Zhejiang University

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    Abstract:

    By using tin tetrachloride pentahydrate and lanthanum nitrate as raw materials, Lanthanum stannate powder was prepared by chemical coprecipitation method with sintering temperature of 920℃. And then Ag-La2Sn2O7 electrical contact composites were prepared by high-energy ball milling and sintering process. The effects of sintering temperature, sintering time and surface modifier on the morphology and phase of La2Sn2O7 powder were investigated, and the physical properties of Ag- La2Sn2O7 were analyzed. The results showed that La2Sn2O7 powder with mesoporous structure was obtained with sintering temperature of 920℃, 2h. With the pressure of 1200MPa and sintering temperature of 900℃, 6h, The properties of Ag- La2Sn2O7 showed good electrical resistivity and hardness. After the hot extrusion process, Ag- La2Sn2O7 electrical contact material had undergone large plastic deformation, in this process, the formation of fiber-like structured distribution of the particles observed contributed to obtain lower resistivity.

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[Zhang Lingjie, Yang Hui, Shen Tao, Zhang Ji, Shen Qianhong, Shen Qianhong, Fan Xianping. Preparation of Mesoporous La2Sn2O7 Powder and Its application in Ag based electrical Contact Materials[J]. Rare Metal Materials and Engineering,2018,47(S2):53~57.]
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History
  • Received:December 12,2017
  • Revised:December 12,2017
  • Adopted:February 01,2018
  • Online: November 01,2018
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