New insights into linear electrical properties of pressureless sintered SiC-MoSi2-AlN composites

doi:10.1016/j.jeurceramsoc.2018.11.020

	New insights into linear electrical properties of pressureless sintered SiC-MoSi2-AlN composites
	Zheng, Jia-Qi; Chen, Jian; Liu, Xue-Jian; Huang, Zheng-Ren; Chen, Jun-Jun
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2019-04-01
卷号	39 期号:4 页码:773
关键词	Silicon carbide Molybdenum disilicide Linear electrical property Schottky barrier Electrical percolation
ISSN号	0955-2219
DOI	10.1016/j.jeurceramsoc.2018.11.020
文献子类	Article
英文摘要	Highly conductive SiC-MoSi2-AlN composites were fabricated by beta-SiC, AlN and MoSi2 powders with Y2O3 additive via pressureless sintering. The effect of MoSi2 content on the microstructure, mechanical and electrical properties of SiC-MoSi2-AlN composites was systematically investigated. A finer microstructure was obtained and electrical conductivity was enhanced with increasing MoSi2 content. The impedance spectroscopy and potential-current measurements were implemented to figure out the electrical conduction mechanism. The introduction of MoSi2 effectively reduced the Schottky barrier height at the grain boundary, and subsequently the U-I curves changed from nonlinear to linear electrical characteristics. The notable decrease in electrical resistivity was owing to the breakdown of grain boundaries and the formation of percolation paths. The percolation threshold was in the range of 0-5.44 vol% MoSi2, much lower than the reference value. The composites with 10 wt% MoSi2 exhibited an electrical resistivity of about 60 Omega cm, suitable for infrared source element applications.
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27238]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Zheng, Jia-Qi,Chen, Jian,Liu, Xue-Jian,et al. New insights into linear electrical properties of pressureless sintered SiC-MoSi2-AlN composites[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(4):773.
APA	Zheng, Jia-Qi,Chen, Jian,Liu, Xue-Jian,Huang, Zheng-Ren,&Chen, Jun-Jun.(2019).New insights into linear electrical properties of pressureless sintered SiC-MoSi2-AlN composites.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(4),773.
MLA	Zheng, Jia-Qi,et al."New insights into linear electrical properties of pressureless sintered SiC-MoSi2-AlN composites".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.4(2019):773.