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Influence of Rare Earth on the Wetting Ability of AgSnO2 Contact Material
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Influence of Rare Earth on the Wetting Ability of AgSnO2 Contact Material
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Natural Science Foundation of Hebei Province (E2009000063)

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    摘要:

    AgSnO2是最有可能替代AgCdO的觸頭材料，但AgSnO2在使用過程中存在先天的缺陷。添加稀土元素能否增大AgSnO2觸頭材料的潤濕性，改善其缺陷是本文討論的重點。通過楊氏方程可知，潤濕角θ越小，材料的潤濕性越好。本工作選取La和Ce兩種稀土元素，選取與SnO2的3種不同配比制備觸頭材料，利用座滴法測量了銀基觸頭材料的潤濕角。再與AgSnO2觸頭材料的潤濕角進行對比。從測量結(jié)果可知，La元素對AgSnO2觸頭材料潤濕性的改善效果明顯。為了進一步驗證這一結(jié)論，對AgSnO2和AgSnO2La2O3兩種觸頭材料進行了模擬電弧試驗，并對其進行微觀分析。從而證明了AgSnO2La2O3觸頭材料的潤濕效果較好。

    Abstract:

    AgSnO2 is a most potential substitute contact material for AgCdO. In practice, however, it has some congenital defects. This paper, is to focus whether wetting ability of AgSnO2 contact material can be improved and its defects can be decreased when rare earth elements are added. Young’s equation has proved that the smaller the wetting angle is, the better the material wetting ability. So, rare earth elements La and Ce were selected as additives in the present experiment. And three Ag-based contact materials were prepared with different ratios of SnO2 to La or Ce. Then, wetting angles of the contact material were measured by the sessile drop method. They were compared with the wetting angle of the AgSnO2 contact material. The measurement results show that La can improve the wetting ability of AgSnO2 contact material obviously. For further proving this conclusion, the simulation arc tests for AgSnO2 and AgSnO2La2O3 contact materials were carried on. And their microstructures were analyzed. The results prove that AgSnO2La2O3 contact material has better wetting ability than AgSnO2.

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王海濤,王景芹,杜 江,孟凡青. Influence of Rare Earth on the Wetting Ability of AgSnO2 Contact Material[J].稀有金屬材料與工程,2014,43(8):1846~1849.[Wang Haitao, Wang Jingqin, Du Jiang, Meng Fanqing. Influence of Rare Earth on the Wetting Ability of AgSnO2 Contact Material[J]. Rare Metal Materials and Engineering,2014,43(8):1846~1849.]
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  • 收稿日期:2013-08-25
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  • 在線發(fā)布日期: 2015-01-04
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