"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

New Ag-SnO2-MeO ecological advanced materials for electrical contacts used in electromagnetic contactors

M. LUNGU1,* , S. GAVRILIU1, S. NITU2, T. CANTA3, D. SIN4, P. BUDRUGEAC1, D. PATROI1

Affiliation

  1. National Institute for R&D in Electrical Engineering-INCDIE ICPE-CA, 030138 Bucharest- 3, Romania
  2. POLITEHNICA University of Bucharest, Bucharest, Romania
  3. Technical University of Cluj-Napoca, Cluj-Napoca, Romania
  4. S. C. Electroaparataj SA, Bucharest, Romania

Abstract

The paper presents the research results about the achievement and characterization of some new Ag-SnO2-MeO (MeO = Bi2O3 and CuO) ecological electrical contact materials as substitutes of the toxic and carcinogenic Ag-CdO ones. The new materials were obtained from very fine and uniform Ag-SnO2 chemical powders mixtures doped with MeO. These were realized by a wet way, in an AgNO3 aqueous solution containing SnO2 and MeO particles in suspension, by Ag precipitation „in situ” with a Na2CO3 . 10H2O aqueous solution. The obtained mixtures were filtered, washed, dried, calcined to the desired final composition, washed again to remove the impurities and dried. Then these were processed by powder metallurgy techniques in form of electrical contact pieces fitted in AC electromagnetic contactors working in air at Ith = 125 A and In = 107 A. The materials were characterized from the physical, mechanical, electrical, microstructural and functional points of view..

Keywords

Ag-SnO2-MeO, Contact materials, Electromagnetic contactors.

Submitted at: March 13, 2008
Accepted at: May 14, 2008

Citation

M. LUNGU, S. GAVRILIU, S. NITU, T. CANTA, D. SIN, P. BUDRUGEAC, D. PATROI, New Ag-SnO2-MeO ecological advanced materials for electrical contacts used in electromagnetic contactors, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 5, pp. 1064-1068 (2008)