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http://dx.doi.org/10.5370/JEET.2017.12.6.2348

Electrical Contact Characteristics of Ag-SnO2 Materials with Increased SnO2 Content  

Chen, Pengyu (Department of Materials Physics, School of Science, Xi'an Jiaotong University)
Liu, Wei (Jinduicheng Molybdenum Co., Ltd.)
Wang, Yaping (Department of Materials Physics, School of Science, Xi'an Jiaotong University)
Publication Information
Journal of Electrical Engineering and Technology / v.12, no.6, 2017 , pp. 2348-2352 More about this Journal
Abstract
The electrical contact characteristics including temperature rise, contact resistance and arc erosion rate of the $Ag-SnO_2$ materials with increased $SnO_2$ content were investigated during the repeated make-and-break operations. The thickness of arcing melting layer reduces by half and the arc erosion rate decreases more than 70% under 10000 times operations at AC 10 A with the $SnO_2$ content increasing from 15 wt.% to 45 wt.%, on one hand, temperature rise and contact resistance increase obviously but could be reduced to the same order of conventional $Ag-SnO_2$ materials by increasing the contact force. The microstructure evolution and the effect of $SnO_2$ on the arc erosion, contact resistance were analyzed.
Keywords
$Ag-SnO_2$; Arc erosion; Electrical properties;
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