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杨敏杰,刘满门,姚芳,李晓龙,周晓龙.SnO2含量对AgCuOSnO2电接触性能的影响[J].稀有金属材料与工程(英文),2021,50(1):63~70.[Minjie Yanga,Manmen Liu,Fang Yao,Xiaolong Li and Xiaolong Zhou.Influence of SnO2 content on AgCuOSnO2 electrical contact preformance[J].Rare Metal Materials and Engineering,2021,50(1):63~70.]
Influence of SnO2 content on AgCuOSnO2 electrical contact preformance
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Received:December 02, 2019  
Key words: AgCuOSnO2 electrical contact materials, electrical contact performance, Arc erosion morphology
Foundation item:Key Project of Yunnan Province Science and Technology Program of China (No. 2017FA027);National Nature Science Foundation of China (Grant No. 51361016)
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Minjie Yanga,Manmen Liu,Fang Yao,Xiaolong Li and Xiaolong Zhou  
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      AgCuOSnO2 electrical contact materials with different SnO2 contents were prepared by reaction synthesis. In this paper, FQR-7501 eddy current conductivity meter is used to measure the conductivity of the polished AgCuOSnO2. The erosion morphology of the surface of the AgCuOSnO2 electrical contact is observed and studied by Scanning Electron Microscope (SEM). The JF04C DC digital resistance tester is used to carry out 10000 dot tests. The results show that the contact resistance of AgCuO(10)SnO2(5) and AgCuO(10)SnO2(8) electric contact materials is lower than 1.3mΩ at U = 12V and I = 15A, and the fluctuation is the smallest; when I = 10A, the welding force of AgCuO(10)SnO2 (x, x = 2,5,8) is less than 8cN, and the welding force of AgCuO(10)SnO2(5) electric contact is small and stable when the current increases; when the arc erosion of AgCuOSnO2 electric contact materials occurs, the material transfer way is from anode to cathode. With the increasing of SnO2 content, the loss in the process of material transfer is restrained and reduced. There are little pores and microcracks on the surface of the transferred electrical contact, and the surface morphology is relatively flat.