Preparation and Study on Nano-Ag/SnO₂ Electrical Contact Material Doped Rare Earth Element

Abstract:

As a new type of electrical contact material, Ag/SnO₂ has poor processing performance and large contact resistance, which limits its application so far. In order to improve the machinability and electrical performance of the Ag/SnO₂ electrical contact materials, a new kind of nanoAg/SnO₂ electrical contact material doped rare earth element Ce was prepared by sol-gel-chemical plating method. The purity of the powders was analyzed by X-ray diffraction (XRD) and the crystallite size of the nanoparticle was calculated according to the Scherrer equation. The distribution of Ce-doped SnO₂ powers were studied using scanning electron microscopy (SEM). In parallel, rated making and breaking experiments on nanoAg/SnO₂ were conducted. The results of XRD and SEM show that the nanoSnO₂ powders are small, uniform and with no obvious phenomenon of reunion, and thus significantly improve the density, strength and machinability of the sample. Furthermore, the results of arc erosion show that the nanoAg/SnO₂ electricity contact materials doped element Ce have superior fusion welding resistance properties.

• Periodical: Materials Science Forum (Volume 789)
• Pages: 270-274
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.789.270
• Online since: April 2014
• Authors: Yan Cai Zhu, Jing Qin Wang, Hai Tao Wang, Li Qiang An
• Keywords: Machinability, Nano Doped, Rare Earth Elements, Sol-Gel-Chemical Plating, Welding Resistance Properties

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