Y4Si2O7N2: A New Oxynitride with Low Thermal Conductivity

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	Y4Si2O7N2: A New Oxynitride with Low Thermal Conductivity
	L. C. Sun; B. Liu; J. M. Wang; J. Y. Wang; Y. C. Zhou; Z. J. Hu
	2012
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	95 期号:10 页码:3278-3284
摘要	Search for new thermal barrier materials with high-temperature stability is very difficult because there are intractable choices among thousands of possible candidates. The present paper shows that identifying and developing new low thermal conductivity materials can be accomplished by first-principles calculations of equilibrium crystal structure and elasticity, and thereafter making theoretical prediction of minimum high-temperature lattice thermal conductivity basing on David Clarke's method for insulating materials. We highlight a new oxynitride ceramic, Y4Si2O7N2, with a low theoretical minimum thermal conductivity of 1.12 similar to W center dot m-1 center dot K-1. The theoretical result is further validated by experimental measurement of thermal conductivity of dense and bulk Y4Si2O7N2. The experimental thermal conductivity is 1.50 similar to W center dot m-1 center dot K-1 at 1300 similar to K. Furthermore, thermal properties of Y4Si2O7N2 are investigated for evaluating its potential performances.
部门归属	[sun, luchao; liu, bin; wang, jiemin; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china. [sun, luchao; wang, jiemin] chinese acad sci, grad sch, beijing 100039, peoples r china. [zhou, yanchun; hu, zijun] aerosp res inst mat & proc technol, beijing 100076, peoples r china.;wang, jm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china.;jywang@imr.ac.cn
关键词	Theoretical Elastic Stiffness Barrier Coatings Mechanical-properties Gas Gamma-y2si2o7 Crystal Y2sio5 System Phase Si3n4-sio2-y2o3
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60244
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. C. Sun,B. Liu,J. M. Wang,et al. Y4Si2O7N2: A New Oxynitride with Low Thermal Conductivity[J]. Journal of the American Ceramic Society,2012,95(10):3278-3284.
APA	L. C. Sun,B. Liu,J. M. Wang,J. Y. Wang,Y. C. Zhou,&Z. J. Hu.(2012).Y4Si2O7N2: A New Oxynitride with Low Thermal Conductivity.Journal of the American Ceramic Society,95(10),3278-3284.
MLA	L. C. Sun,et al."Y4Si2O7N2: A New Oxynitride with Low Thermal Conductivity".Journal of the American Ceramic Society 95.10(2012):3278-3284.