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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
2019-04-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume39Issue:4Pages:773
SubtypeArticle
AbstractHighly 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.
KeywordSilicon carbide Molybdenum disilicide Linear electrical property Schottky barrier Electrical percolation
DOI10.1016/j.jeurceramsoc.2018.11.020
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27238
Collection中国科学院上海硅酸盐研究所
Recommended Citation
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.
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