郑晓华,吴君臣,吴新合,王贵葱,沈涛,张玲洁,杨芳儿.LaSrCuO4粉体微结构对Ag/LSCO电接触材料性能的影响[J].稀有金属材料与工程,2020,49(4):1306~1311.[Zheng Xiao-hua,Wu Jun-chen,Wu Xin-he,Wang Gui-cong,Shen Tao,Zhang Ling-jie,Yang Fang-er.Effects of microstructure of LaSrCuO4 powders on properties of Ag/LSCO electrical contact materials[J].Rare Metal Materials and Engineering,2020,49(4):1306~1311.]
LaSrCuO4粉体微结构对Ag/LSCO电接触材料性能的影响
投稿时间:2019-05-12  修订日期:2019-11-26
中文关键词:  La2-xSrxCuO4  银基电接触材料  电学性能
基金项目:浙江省重点研发计划资助项目(No. 2017C01051);国家自然科学基金资助项目(No. 51801180)
中文摘要:
      以硝酸镧、硝酸铜、硝酸锶等为原料,分别采用固相法、溶胶-凝胶法和共沉淀法合成了不规则颗粒状(LSCOg)、介孔状(LSCOm)和片层状(LSCOl)的LaSrCuO4(LSCO)粉体。采用高能球磨并结合初压-初烧-热压工艺制备出Ag/LSCO电接触材料。利用X 射线衍射(XRD)、扫描电镜(SEM)、金属电导率仪、维氏硬度计和电寿命试验机等对粉体形貌及电接触材料的物理和电学性能进行了表征。结果表明:与Ag/LSCOm、Ag/LSCOl材料相比,Ag/LSCOg电接触材料表现出更加优异的物理性能,其电阻率为2.37 μΩ ? cm,硬度为800 MPa,密度为9.32 g/cm3;但电学性能差异较小,其在AC220V12A开断状态下的燃弧能量为400 mJ、燃弧时间为23 ms,关合状态下的燃弧能量为1500 mJ,燃弧时间为 68 ms。Ag/LSCO电接触材料的主要失效形式是液滴喷溅,微裂纹和孔洞。
Effects of microstructure of LaSrCuO4 powders on properties of Ag/LSCO electrical contact materials
英文关键词:La2-xSrxCuO4  Ag-based electrical contact materials  electrical properties
英文摘要:
      Lanthanum nitrate, copper nitrate, strontium nitrate and so on were used as raw materials to synthesize the irregular granular (LSCOg), mesoporous (LSCOm) and lamellar (LSCOl) LaSrCuO4 (LSCO) powders by solid phase method, sol-gel method and co-precipitation method respectively. Ag/LSCO electrical contact materials were prepared by high-energy ball milling combined with initial pressing, sintering and hot pressing. The morphology of LSCO powders and the microstructure, physical and electrical properties of Ag/LSCO materials were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), conductivity instrument, Vickers hardness tester and electrical life tester. The results show that, compared with Ag/LSCOm material and Ag/LSCOl material, Ag/LSCOg material exhibits a lower resistivity of 2.37 μΩ?cm, higher hardness of 800 MPa, higher average density of 9.32 g/cm3. Under the conditions of AC220V 12A, the arcing energy and arcing time of Ag/LSCOg electrical contact material are 400 mJ and 23 ms for breaking state, 1500 mJ and 68 ms for closing state. The failure modes of Ag/LSCO electrical contact materials are droplet splashing, micro-cracks and micro-holes.
作者单位E-mail
郑晓华 浙江工业大学材料科学与工程学院 zhengxh@zjut.edu.cn 
吴君臣 浙江工业大学材料科学与工程学院 1366457536@qq.com 
吴新合   
王贵葱 浙江工业大学材料科学与工程学院  
沈涛 浙江加州国际纳米技术研究院  
张玲洁 浙江加州国际纳米技术研究院  
杨芳儿 浙江工业大学材料科学与工程学院  
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