Facile synthesis of silver-tin oxide electrical contact materials by in-situ decomposition of a uniform mixture precursor

4th Global Conference on Materials Science and Engineering

Lin, Z.J.^1 ; Sun, X.D.^1 ; Liu, S.H.^1,2 ; Xie, M.^2 ; Chen, J.L.^2 ; Li, J.G.^3

Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang, Liaoning

110819, China^1

State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming

650106, China^2

Advanced Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki

305-0044, Japan^3

关键词: Composite powders;    Electrical conductivity;    Electrical contact material;    Facile synthesis;    Hot pressing method;    Ion exchange reactions;    Precipitation rates;    Silver tin oxides;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/103/1/012008/pdf
DOI  :  10.1088/1757-899X/103/1/012008

来源: IOP

【 摘 要 】

A uniform mixture precursor containing Ag2O and Ag2SnO3was synthesized via a facile ion exchange reaction method. The influence of pH value on composition and precipitation rate of the precursor was investigated systematically. The Ag-SnO2composite powder was obtained by decomposition of the precursor at 600°C, and uniform mixing of elements was inherited from the precursor and fresh and intimate Ag-SnO2interfaces were created. The Ag-SnO2electrical contact material was prepared using this composite powder by hot-pressing method. It was found that nano-sized SnO2particles (about 20.6 nm) are homogeneously dispersed in the Ag-matrix. The as-prepared Ag-SnO2electrical contact material shows excellent performances, such as high hardness (154 MPa), high density (9.90 g/cm3) and good electrical conductivity (72.24 %IACS).