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DOI QR Code

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)
  • Received : 2017.05.11
  • Accepted : 2017.06.28
  • Published : 2017.11.01

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

References

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