摘要
本文运用溶胶-凝胶燃烧法合成了双钙钛矿型LaNi_(x)Co_(1-x)O_(3)(LNCO)纳米材料,利用粉末冶金和热挤压技术制备了相应的Ag/LNCO触点材料及元件样品。重点考察了不同Ni、Co含量对Ag/LNCO触点材料微观结构、物相组成、物理性能、力学性能及电寿命服役能力的影响,对其电弧侵蚀失效行为进行了研究,并与SnO2粉体增强Ag基触点材料进行对比。结果表明:溶胶凝胶法合成的LNCO纳米颗粒粒径为20-30 nm,经粉末冶金工艺制备的Ag/LaNi_(0.5)Co_(0.5)O_(3)触点材料电学性能和电寿命都优于Ag/SnO_(2)触点材料,其电阻率低至2.10μΩ∙cm,电寿命性能达到51287次。表明Ag/LaNi_(0.5)Co_(0.5)O_(3)触点材料性能较佳,是一种可以取代Ag/CdO的新型触点材料。
The double-perovskite LaNi_(x)Co_(1-x)O_(3)(LNCO)nanomaterials were synthesized by using sol-gel combustion method,and Ag/LNCO electrical contact materials and their component samples were fabricated by powder metallurgy combined with hot extrusion technique.The effects of different Ni and Co contents on microstructure,phase composition,physical properties,mechanical properties and electrical life service capability of the Ag/LNCO contact materials were investigated,followed by a preliminary investigation on their arc erosion failure behavior in comparison with that of the commercially available SnO_(2) powder-reinforced Ag-based contact materials.The results show that the LaNi_(x)Co_(1-x)O_(3) nanomaterials with a size of 20~30 nm can be synthesized by the sol-gel method.With a resistivity of 2.10μΩ∙cm and an electrical life service capability of 51287 cycles,Ag/LaNi_(0.5)Co_(0.5)O_(3) prepared by powder metallurgy process displayed better electrical contact performance than Ag/SnO_(2) materials.Therefore,Ag/LaNi_(0.5)Co_(0.5)O_(3) is another potential substitute for traditional Ag/CdO.
作者
邵紫阳
杨芳儿
王大帅
刘振武
沈涛
李跃
郑晓华
SHAO Ziyang;YANG Fanger;WANG Dashuai;LIU Zhenwu;SHEN Tao;LI Yue;ZHENG Xiaohua(College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310058,China;Institute of Wenzhou,Zhejiang University,Wenzhou 325036,Zhejiang,China)
出处
《贵金属》
CAS
北大核心
2024年第2期19-25,共7页
Precious Metals
基金
浙江大学科技创新合作专项(桂科ZD20302002
桂科AB22036003)。
