Title :
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
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;
Conference_Titel :
Electrical contacts - 2006, proceedings of the fifty-second ieee holm conference on
Conference_Location :
Montreal, QC
Print_ISBN :
1-4244-0581-5
DOI :
10.1109/HOLM.2006.284076
