In situ Pyrolyzed Carbon on the Property of AlN-based Microwave Attenuation Ceramics

doi:10.15541/jim20170203

	In situ Pyrolyzed Carbon on the Property of AlN-based Microwave Attenuation Ceramics
	He Yong-Qin ; Li Xiao-Yun ; Zhang Jing-Xian ; Li Xiao-Guang
刊名	JOURNAL OF INORGANIC MATERIALS
	2018
卷号	33 期号:4 页码:421
关键词	phenolic resin AlN thermal conductivity dielectric loss
ISSN号	1000-324X
DOI	10.15541/jim20170203
英文摘要	Carbon materials exhibit excellent microwave absorbing properties. However, it is difficult to disperse carbon homogeneously in the ceramic substrate. In this study, carbon was introduced into AlN matrix by addition of phenolic resin followed by pyrolysis process. The effects of phenolic resin content on sintering behavior, microstructure, thermal conductivity and dielectric properties of AlN ceramics were investigated. It was found that phenolic resin derived carbon could effectively promote the densification of AlN ceramics and reduce the sintering temperature. Relative density of the AlN ceramics reached 99.26% after sintering at 1700 degrees C with addition of 3wt% phenolic resin. In addition, it was found that the presence of phenolic resin derived carbon can effectively improve the thermal conductivity of the ceramics. The dielectric properties were also improved due to the carbon films formed in the pores and at AlN grain boundaries. With addition of 6wt% phenolic resin, AlN ceramics showed high thermal conductivity of 135.1 W/(m.K) and excellent microwave attenuation properties (the dielectric loss was 0.3 at X-band), which were perspective candidates for possible applications in high power microwave vacuum electron devices.
学科主题	Materials Science, Ceramics
出版者	SCIENCE PRESS
WOS记录号	WOS:000432434500010
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24981]
专题	中国科学院上海硅酸盐研究所
作者单位	1.[He Yong-Qin 2.Nanjing Tech Univ, Sch Mat Sci & Engn, Nanjing 210009, Jiangsu, Peoples R China 3.Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct, Nanjing 210009, Jiangsu, Peoples R China 4.[Zhang Jing-Xian 5.Chinese Acad Sci, Shanghai Inst Ceram, Struct Ceram Engn Res Ctr, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	He Yong-Qin,Li Xiao-Yun,Zhang Jing-Xian,et al. In situ Pyrolyzed Carbon on the Property of AlN-based Microwave Attenuation Ceramics[J]. JOURNAL OF INORGANIC MATERIALS,2018,33(4):421, 426.
APA	He Yong-Qin,Li Xiao-Yun,Zhang Jing-Xian,&Li Xiao-Guang.(2018).In situ Pyrolyzed Carbon on the Property of AlN-based Microwave Attenuation Ceramics.JOURNAL OF INORGANIC MATERIALS,33(4),421.
MLA	He Yong-Qin,et al."In situ Pyrolyzed Carbon on the Property of AlN-based Microwave Attenuation Ceramics".JOURNAL OF INORGANIC MATERIALS 33.4(2018):421.