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罗国强,王春生,胡家念,陈常连,孙一,李美娟,王传彬,沈强.电磁感应加热银膜的无压烧结及其性能研究[J].稀有金属材料与工程(英文),2021,50(5):1694~1698.[Luo Guoqiang,Wang Chunsheng,Hu Jianian,Chen Changlian,Sun Yi,Li Meijuan,Wang Chuanbin and Shen Qiang.Pressureless sintering and Properties of silver film for electromagnetic induction heating[J].Rare Metal Materials and Engineering,2021,50(5):1694~1698.]
Pressureless sintering and Properties of silver film for electromagnetic induction heating
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Received:February 28, 2020  
DOI:
Key words: Electromagnetic induction heating silver film  Pressureless sintering  Densification  Sheet resistance  Adhesion strength
Foundation item:国家自然科学基金重点项目(51932006), 湖北省技术创新专项重大项目(2019AFA176)
Author NameAffiliation
Luo Guoqiang,Wang Chunsheng,Hu Jianian,Chen Changlian,Sun Yi,Li Meijuan,Wang Chuanbin and Shen Qiang  
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Abstract:
      In this paper, silver films for electromagnetic induction heating were prepared on alumina ceramic through screen printing and pressureless sintering. The microstructure, mechanical properties and electrical properties of the silver films were characterized by SEM, four probe test and tensile test. The results indicate that the density of silver film is closely related to sintering temperature and glass frit content. With the increase of sintering temperature, the viscosity of the glass melt decreases, the silver particles are wetted and rearranged effectively, and a dense silver network forms through the sintering neck growth and further fusion. Meanwhile, with the increase of glass frit content, glass melt can not only promote the densification of silver particles, but also improve the adhesion strength of silver film and substrate. However, much glass melts block the contact between silver particles, thereby reducing the conductivity of the silver film. When the sintering temperature is 640 ℃ and the content of glass frit is 4 wt.%, the silver film owns good comprehensive properties. The sheet resistance reaches a minimum value of 2.26 mΩ/□, and the adhesion strength is high, reaching 14.64 MPa. The experimental results of electromagnetic induction heating show that the silver film with smaller sheet resistance has a faster heating rate.