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AgSnO2 sintered electrical contacts with ultrafine and uniformly dispersed microstructure

M. LUNGU1,* , S. GAVRILIU1, T. CANTA2, M. LUCACI1, E. ENESCU1

Affiliation

  1. NCDIE ICPE-CA – National Institute for Research and Development in Electrical Engineering, 313 Splaiul Unirii, 030138 Bucharest - 3, Romania
  2. Technical University of Cluj Napoca, C. Daicoviciu no. 15, Cluj Napoca, Romania

Abstract

The paper presents the research results concerning the preparation of some advanced materials starting from AgSnO2 very fine powders mixtures, having microcrystaline sizes obtained by chemical methods. These powders were processed by powder metalurgy techniques in order to manufacture some electrical contacts for low voltage devices working in air. The materials were characterized during the whole technological flow. Comparatively, there are presented the physical, mechanical, electrical, microstructural and functional characteristics of the sintered electrical contacts from powder mixtures obtained by chemical and mechanical methods. The fine and uniformly dispersed microstructure leads to the improvement of the functional characteristics of the electrical contacts: behavior at the electrical erosion, sticking, overtemperature and arc quenching..

Keywords

Very fine powders mixtures, Silver tin oxide materials, Electrical contacts.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

M. LUNGU, S. GAVRILIU, T. CANTA, M. LUCACI, E. ENESCU, AgSnO2 sintered electrical contacts with ultrafine and uniformly dispersed microstructure, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 576-581 (2006)