Preparation of Ag/SnO2+La203+Bi2O3 Contact Material

Author

Wang, Haitao ; Wang, Jingqin ; Wen, Ming ; Zhao, Jingying ; Liu, Guojin

Author_Institution

Electr. Apparatus Inst., Hebei Univ. of Technol., Tianjin

fYear

2006

fDate

25-27 Sept. 2006

Firstpage

131

Lastpage

135

Abstract

A super-fine compound powder, Ag/SnO₂-La₂O₃-Bi₂O₃ has been obtained using the chemical co-precipitation method. The contact material has been made by this compound power through forming, sintering, re-pressing and annealing to improve its conductivity, density and hardness. The sample material has been achieved by the following preparation process parameters: forming at a pressure of 30 tons, sintering at 920degC for 8h, re-pressing at a pressure of 40 tons and annealing at 150degC for 0.5h. The electrical testing results show that the new Ag/SnO₂-La₂O₃-Bi₂O₃ contact material has better electrical behavior compared with traditional Ag/CdO.

Keywords

annealing; bismuth compounds; electrical conductivity; forming processes; hardness; lanthanum compounds; metal-insulator boundaries; precipitation (physical chemistry); pressing; silver; sintering; tin compounds; Ag-SnO₂-La₂O₃-Bi₂O₃; annealing; chemical coprecipitation method; contact material; electrical conductivity; electrical testing; forming; hardness; pressing; sintering; superfine compound powder; temperature 150 C; temperature 920 C; time 0.5 h; time 8 h; Annealing; Chemical compounds; Chemical elements; Chemical technology; Composite materials; Conducting materials; Conductivity; Contacts; Powders; Silver; Ag/SnO2-La2O3-Bi2O3; annealing; contact material; forming; re-pressing; sintering;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical contacts - 2006, proceedings of the fifty-second ieee holm conference on

Conference_Location

Montreal, QC

Print_ISBN

1-4244-0581-5

Type

conf

DOI

10.1109/HOLM.2006.284076

Filename

4063112