Dielectric properties of AlN/Mo composite ceramics prepared by spark plasma sintering method at different processing conditions  

作　　者：Peng Gao Cheng-Chang Jia Wen-Bin Cao Cong-Cong Wang Guo-Liang Xu Dong Liang Zhao-Wen Cui 

机构地区：[1]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Rare Metals》2022年第4期1369-1374,共6页稀有金属（英文版）

基　　金：financially supported by the International Cooperation Project between China and Russia (No. 2010DFR50360)

摘　　要：In this study,the effects of powder mixed method,sintering temperature,and the additive amount of the conductive phase on the dielectric loss tangent and permittivity constant of AlN/Mo composite ceramics were investigated.All the ceramic samples were prepared by spark plasma sintering(SPS).AlN composite ceramics with additional 10 vol%Mo sintered at 1400℃holding for 5 min exhibit the best dielectric loss tangent,which is greater than 0.23.AlN/Mo ceramics with additional 20 vol%Mo become conductive,with the resistivity of 0.05–0.06Ω·m.High-energy ball milling is better than magnetic stirring powder mixing method.In addition,the additive Mo and lower sintering temperature lead to a better property with the increase in the electromagnetic wave frequency range of 1×10^(3)–1×10^(6)Hz.

关 键 词：Aluminum nitride MOLYBDENUM Dielectric loss Spark plasma sintering 

分 类 号：TQ174.758.22[化学工程—陶瓷工业]