Porous gamma-(Yi(1-x)Ho(x))(2)Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity

doi:10.1016/j.jeurceramsoc.2018.02.027

IMR OpenIR

	Porous gamma-(Yi(1-x)Ho(x))(2)Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity
	Wu, Zhen; Hu, Wanpeng; Luo, Yixiu; Sun, Luchao; Wang, Jingyang
通讯作者	Wang, Jingyang(jywang@imr.ac.cn)
	2018-08-01
发表期刊	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN	0955-2219
卷号	38 期号:9 页码:3347-3353
摘要	High-temperature thermal insulation materials challenge extensive candidates with good mechanical, thermal and chemical reliability at high temperatures. Recently, porous gamma-Y2Si2O7 was indicated a promising thermal insulator in harsh environment; however, its strength at 1300 degrees C reduced to 34% of that at room temperature. In this work, we significantly improved its high-temperature strength by doping Ho. Highly porous gamma-(Y1-xHox)(2)Si2O7 solid solution was fabricated by in-situ foam-gelcasting method. Especially, porous gamma-(Y2/3Ho1/3)(2)Si2O7 demonstrated the optimal high-temperature strength, for instance 65% retention at 1300 degrees C, as well as high compressive strength (13.9 MPa) and low thermal conductivity (0.186 W/(m K)) at room temperature, at the porosity of 79.3%. Interestingly, porous solid solution sample displayed obviously lower thermal conductivity than the two end pure-phase porous materials. Porous gamma-(Y1-xHox)(2)Si2O7 solid solution is clearly highlighted as a promising high -temperature thermal insulator with outstanding high -temperature strength retention and optimal low thermal conductivity.
关键词	Porous rare earth silicate High-temperature thermal insulator In-situ reactionfoam-gelcasting method High-temperature strength Low thermal conductivity
资助者	National Key R&D Program of China ; Natural Science Foundation of China
DOI	10.1016/j.jeurceramsoc.2018.02.027
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFB0703201] ; Natural Science Foundation of China[51372252] ; Natural Science Foundation of China[51772302]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000433014200035
出版者	ELSEVIER SCI LTD
引用统计	被引频次：12[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/321006/128080
专题	中国科学院金属研究所
通讯作者	Wang, Jingyang
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, High Performance Ceram Div, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Wu, Zhen,Hu, Wanpeng,Luo, Yixiu,et al. Porous gamma-(Yi(1-x)Ho(x))(2)Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2018,38(9):3347-3353.
APA	Wu, Zhen,Hu, Wanpeng,Luo, Yixiu,Sun, Luchao,&Wang, Jingyang.(2018).Porous gamma-(Yi(1-x)Ho(x))(2)Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,38(9),3347-3353.
MLA	Wu, Zhen,et al."Porous gamma-(Yi(1-x)Ho(x))(2)Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38.9(2018):3347-3353.