添加剂对新型AgTiB2触头材料微结构和性能的影响

以乙二胺为溶剂采用微波溶剂热法合成铜铟镓硒(CIGS)粉体,研究了反应温度、表面活性剂对合成产物物相及形貌的影响.采用X射线衍射仪、扫描电镜及X射线能谱仪对产物的物相、形貌及组成进行表征.结果表明:在反应温度为230℃(反应时间为2 h)条件下可以获得物相单一,颗粒尺寸较小的CIGS粉体.在基准溶液中加入表面活性剂十二烷基硫酸钠(SDS)后对合成产物形貌有明显改善作用,粉体分散性较好,呈圆球状且粒径较小,为100～200 nm.

Effect of Additives on Microstructure and Properties of Novel AgTiB2 Composite

AgTiB2 contact material with different additives was prepared by high-energy milling and powder metallurgy. The effects of WO3, Al, Bi2O3 addition and WO3+Bi2O3, WO3+Al composite additions on the microstructure and properties of AgTiB2 were investigated. The morphology of milled powders and the microstructure of AgTiB2 composite with different additives were characterized by scanning electron microscope equipped with energy disperse spectroscopy, and the hardness and electrical conductivity were tested. The results show that WO3 single addition and WO3+Al, WO3+Bi2O3 composite additions can improve the densification of AgTiB2. In comparison with those of Ag/TiB2 composite without any additive, the hardness and electrical conductivity of the AgTiB2 composite materials with WO3 single addition and WO3+Al composite addition are increased, whose hardness values are 1253 and 1022 MPa respectively, and the electrical conductivity are 78.62%IACS and 14.91%IACS, respectively. The hardness and electrical conductivity of the AgTiB2 composite materials with Bi2O3+WO3 composite addition are 786 MPa and 16.12%IACS, respectively