Preparation and properties of Si2N2O/beta-cristobalite composites

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	Preparation and properties of Si2N2O/beta-cristobalite composites
	Q. F. Tong; J. Y. Wang; Z. P. Li; Y. C. Zhou
	2008
发表期刊	Journal of the European Ceramic Society
ISSN	0955-2219
卷号	28 期号:6 页码:1227-1234
摘要	Bulk Si2N2O/beta-cristobalite composites have been fabricated by a hot-pressing method using Si3N4, SiO2 and Li2CO3 as starting materials. beta-Cristobalite in the as-sintered composites is successfully stabilized to room temperature through incorporating N and Li into its structure. The introduction of beta-cristobalite significantly improves the dielectric properties. Si2N2O/62vol.% beta-cristobalite composite shows a low dielectric constant of 4.8 at 1 MHz. In addition, the density, Young's and shear modulus, and strength of the composites decrease with the increase of beta-cristobalite content. When the beta-cristobalite content is up to 62 vol.%, the flexural strength of the composite reaches 212 MPa. The bulk Si2N2O/beta-cristobalite composites show the combination of low density, excellent mechanical performance, low dielectric constant and loss tangent, indicating that they are promising high-temperature structural/functional materials. (c) 2007 Elsevier Ltd. All rights reserved.
部门归属	[tong, qingfeng; wang, jingyang; zhou, yanchun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [li, zhongping] natl key lab adv funct composite mat, beijing 100076, peoples r china.;zhou, yc (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;yczhou@imr.ac.cn
关键词	Cristobalite Mechanical Properties Dielectric Properties Sio2 Si2n2o Silicon Oxynitride Ceramics Beta-cristobalite Glasses Crystallization Transformation Stabilization Toughness Strength Phase
URL	查看原文
WOS记录号	WOS:000254139300016
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33108
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. F. Tong,J. Y. Wang,Z. P. Li,et al. Preparation and properties of Si2N2O/beta-cristobalite composites[J]. Journal of the European Ceramic Society,2008,28(6):1227-1234.
APA	Q. F. Tong,J. Y. Wang,Z. P. Li,&Y. C. Zhou.(2008).Preparation and properties of Si2N2O/beta-cristobalite composites.Journal of the European Ceramic Society,28(6),1227-1234.
MLA	Q. F. Tong,et al."Preparation and properties of Si2N2O/beta-cristobalite composites".Journal of the European Ceramic Society 28.6(2008):1227-1234.