2Sn2O7;電接觸材料;電阻率;熱擠壓"/> 2Sn2O7電接觸復(fù)合材料。重點考察了膠凝劑濃度、燒結(jié)工藝對La2Sn2O7粉體形貌及物相的影響,并對Ag- La2Sn2O7電接觸材料的物理性能進行了分析。研究結(jié)果表明：以碳酸氫銨為膠凝劑,于燒結(jié)溫度920℃,2h條件下獲得具有網(wǎng)孔結(jié)構(gòu)的La2Sn2O7粉體；于成型壓力1200MPa,燒結(jié)溫度900℃,6h條件下制得的Ag-La2Sn2O7電接觸材料表現(xiàn)出較佳的電阻率和硬度值。經(jīng)過熱擠壓工藝,Ag-La2Sn2O7電接觸材料發(fā)生了大塑性變形,顆粒在熱擠壓過程中發(fā)生流動變形,形成類纖維狀結(jié)構(gòu)的排列分布狀態(tài),表現(xiàn)出更低的電阻率。"/>

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網(wǎng)孔結(jié)構(gòu)La2Sn2O7粉體的制備及其在Ag-電接觸材料的制備及性能研究
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浙江大學,浙江大學,浙江大學,浙江大學,溫州宏豐電工合金股份有限公司;溫州宏豐電工合金股份有限公司,浙江大學,浙江大學

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(浙江省科技計劃項目,項目號2017C01051；浙江省自然科學基金,LQ17E010002)SSS


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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    摘要:

    以五水四氯化錫和硝酸鑭為原料,采用化學共沉淀法在燒結(jié)溫度920℃條件下合成了錫酸鑭粉體。通過高能球磨法+成型燒結(jié)工藝制得Ag-La2Sn2O7電接觸復(fù)合材料。重點考察了膠凝劑濃度、燒結(jié)工藝對La2Sn2O7粉體形貌及物相的影響,并對Ag- La2Sn2O7電接觸材料的物理性能進行了分析。研究結(jié)果表明：以碳酸氫銨為膠凝劑,于燒結(jié)溫度920℃,2h條件下獲得具有網(wǎng)孔結(jié)構(gòu)的La2Sn2O7粉體；于成型壓力1200MPa,燒結(jié)溫度900℃,6h條件下制得的Ag-La2Sn2O7電接觸材料表現(xiàn)出較佳的電阻率和硬度值。經(jīng)過熱擠壓工藝,Ag-La2Sn2O7電接觸材料發(fā)生了大塑性變形,顆粒在熱擠壓過程中發(fā)生流動變形,形成類纖維狀結(jié)構(gòu)的排列分布狀態(tài),表現(xiàn)出更低的電阻率。

    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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張玲潔,楊輝,沈濤,張繼,陳曉,申乾宏,樊先平.網(wǎng)孔結(jié)構(gòu)La2Sn2O7粉體的制備及其在Ag-電接觸材料的制備及性能研究[J].稀有金屬材料與工程,2018,47(S2):53~57.[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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  • 收稿日期:2017-12-12
  • 最后修改日期:2017-12-12
  • 錄用日期:2018-02-01
  • 在線發(fā)布日期: 2018-11-01
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