Simulation and Experimental Study of Dy Doped AgSnO2 Contact Materials
SnO2 in AgSnO2 contact material is a high-hardness and nearly-insulated wide bandgap semiconductor material.During use, the contact resistance is large, the temperature rise is high, and cracks are easily formed, which reduces the reliability of contact and shortens the electrical life.In order to improve the comprehensive properties of AgSnO2 contact material, based on the first principle of density functional theory, the simulation calculation of different ratios of Dy doped SnO2 supercell models are carried out.By analyzing the energy band, density of states and elastic constant, the results show that when the doping ratio of Dy is 12.5%, the conductivity is the best, the hardness is reduced, and the microcrack is the hardest to form.Finally, in the experiment, SnO2 powders with different doping ratios are prepared by sol-gel and AgSnO2 contact materials with different doping ratios are prepared by powder metallurgy method.The arc energy, contact resistance, welding force and hardness are measured.The results show that the electrical conductivity of the doped AgSnO2 contact material is increased, and the welding force and hardness are reduced.When the doping ratio of Dy is 12.5%, the comprehensive properties is the best.Finally, it is proved that the simulation and experimental results can match well.
AgSnO2 contact material first principle Dy-doped SnO2 comprehensive properties
Ying Zhang Zhizhou Bao Jingqin Wang Guangzhi Zhang Yancai Zhu
Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Peoples Electrical Appliance Group Zhejiang Co., Ltd., Zhejiang, 325000, China Shanghai Liangxin Electrical Appliance Co., Ltd., Shanghai, 200333, China
国际会议
江苏苏州
英文
105-110
2019-11-04（万方平台首次上网日期，不代表论文的发表时间）