Effects of Sintering Method and Sintering Temperature on the Microstructure and Properties of Porous Y2SiO5

IMR OpenIR

	Effects of Sintering Method and Sintering Temperature on the Microstructure and Properties of Porous Y2SiO5
	Wu, Zhen; Sun, Luchao; Wang, Jingyang; jywang@imr.ac.cn
	2015
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	31 期号:12 页码:1237-1243
摘要	Porous Y2SiO5 ceramic is a promising high-temperature thermal insulator in harsh environment. However, all the published relevant works faced serious problems, such as severe linear shrinkage, low porosity and low strength. In this study, porous Y2SiO5 ceramic with low sintering shrinkage and high porosity was successfully prepared by foam-gelcasting method using gelatin as the gelling agent. The effects of sintering methods, including in situ reaction sintering and direct sintering, and sintering temperatures on the phase composition, microstructure, shrinkage, porosity, and compressive strength of porous Y2SiO5 were investigated. Compared with samples fabricated by direct sintering, porous Y2SiO5 ceramic prepared via in situ reaction sintering method has the merits of the low linear shrinkage of 1.0%-4.7%, low bulk density of 0.79-0.88 g/cm(3), high porosity of 82.1%-80.1%, and high strength of 3.54-8.03 MPa, when the sintering temperatures increase from 1350 to 1550 degrees C. Porous Y2SiO5 has unique multiple pore structures, especially containing the interconnected small pores in skeleton. The thermal conductivity of porous Y2SiO5 is very low, which is 0.228 W/(m . K) for the sample with a porosity of 79.6%. This work reports an optimal processing method of highly porous Y2SiO5 with the potential application as high-temperature thermal insulation material. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
部门归属	[wu, zhen] univ sci & technol china, hefei 230026, peoples r china ; [wu, zhen ; sun, luchao ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china
关键词	Porous Y2sio5 Ceramic In Situ Synthesis Mechanical Property Thermal Property
资助者	National Natural Science Foundation of China [51032006, 51372252]
收录类别	sci
语种	英语
WOS记录号	WOS:000366158000012
引用统计	被引频次：11[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/321006/74793
专题	中国科学院金属研究所
通讯作者	jywang@imr.ac.cn
推荐引用方式 GB/T 7714	Wu, Zhen,Sun, Luchao,Wang, Jingyang,et al. Effects of Sintering Method and Sintering Temperature on the Microstructure and Properties of Porous Y2SiO5[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2015,31(12):1237-1243.
APA	Wu, Zhen,Sun, Luchao,Wang, Jingyang,&jywang@imr.ac.cn.(2015).Effects of Sintering Method and Sintering Temperature on the Microstructure and Properties of Porous Y2SiO5.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,31(12),1237-1243.
MLA	Wu, Zhen,et al."Effects of Sintering Method and Sintering Temperature on the Microstructure and Properties of Porous Y2SiO5".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 31.12(2015):1237-1243.