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张永清,阴生毅,高向阳,李秀霞,金鹤,张连正.新型高热导率氮化铝基微波衰减陶瓷研究[J].稀有金属材料与工程(英文),2020,49(2):655~660.[Zhang Yongqing,Yin Shengyi,Gao Xiangyang,Li Xiuxia,Jin He and Zhang Lianzheng.Study on Aluminum Nitride Microwave Attenuation Ceramics with High Thermal Conductivity[J].Rare Metal Materials and Engineering,2020,49(2):655~660.]
Study on Aluminum Nitride Microwave Attenuation Ceramics with High Thermal Conductivity
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Received:April 03, 2019  Revised:May 17, 2019
DOI:
Key words: Microwave,attenuating  ceramics,AlN,FeSiAl,hot  pressed sintering
Foundation item:国家重点研发计划(2018YFB1105200);中国科学院国防科技创新基金(CXJJ-15S123)
Author NameAffiliation
Zhang Yongqing,Yin Shengyi,Gao Xiangyang,Li Xiuxia,Jin He and Zhang Lianzheng  
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Abstract:
      To solve the problem of high toxicity and poor consistency of traditional beryllium oxide microwave attenuation ceramics, a kind of environment-friendly AlN-FeSiAl microwave attenuation ceramics based on aluminum nitride with high thermal conductivity was developed in this paper. The material is added FeSiAl to the AlN matrix and belongs to environment-friendly material. In order to obtain high thermal conductivity and good electromagnetic performance, the effects of different aluminum nitride powders, FeSiAl additive amount and sintering process on composite properties were studied. The results show that adopting Toyo aluminum nitride, adding 10 wt% FeSiAl, vacuum hot pressing sintering under 1650 ℃ and 85 MPa, the high attenuation performance of microwave attenuation ceramics is realized, and material thermal conductivity is 88.2 W/(m.K), close to that of the microwave attenuation ceramics based on aluminum nitride in Ceradyne company.