Controllable Preparation of SnO2 Microsphere and its Application in Electrical Contact Material

• 作 者: ZhangJi[1]ShenTao[1]ZhangLingjie[2]ChenXiao[3]YangHui[2]QiGengxin[2]FanXianping[2]
• 机 构: Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou 310029, China
• 出 处: 2016’中国溶胶-凝胶学术研讨会暨国际论坛
• 发表日期: 2016年期

　　SnO2 microspherical (SnO2(s)) were prepared by hydrothermal method using SnCl4·5H2O and NaOH as raw materials, and Ag/SnO2(s) electrical contact material were obtained by high-balling and sintering processes.Effects of surfactants, hydrothermal time and pH value on the morphology of SnO2 microspheres were studied.The morphology, microstructure and physical properties of Ag/SnO2(s) electrical contacts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), Vickers hardness tester and conductivity meter.Results show that mono dispersed SnO2 microspheres with a diameter of 1-4 μm were obtained using CTAB as the template at pH=13 with hydrothermal time of 25h.The electrical resistivity of Ag-SnO2(s)was 3.18 μΩ·cm, which is better than that of traditional Ag/SnO2(p) electrical contact material with nano SnO2 particulates as the second reinforcing material.