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Preparation, microstructure and high temperature performances of porous gamma-Y2Si2O7 by in situ foam-gelcasting using gelatin
Wu, Zhen; Sun, Luchao; Wan, Peng; Wang, Jingyang; jywang@imr.ac.cn
2015
发表期刊CERAMICS INTERNATIONAL
ISSN0272-8842
卷号41期号:10页码:14230-14238
摘要Porous gamma-Y2Si2O7 ceramic with good mechanical and thermal properties is prepared by the in situ reaction sintering foam-gelcasting method using Y2O3 and SiO2 as the starting powders and non-toxic gelatin as the gel former. The porous sample has interconnected large pores (40-230 mu m) and small pores (0.1-2 mu m) in the skeleton. The porosity can be controlled from 64.3% to 89.3% by adjusting the solid content and amount of the slurry. The corresponding strength ranges from 46.5 to 3.4 MPa. Porous gamma-Y2Si2O7 with a porosity between 57.2% and 90.0% shows a low thermal conductivity in the range of 0.918-0.147 W/(m K) at room temperature. Porous gamma-Y2Si2O7 has excellent mechanical property at high temperature (the strength at 1100 and 1200 degrees C is maintained above 71% and 50%, respectively, of the value at room temperature) and good thermal stability (the reheating shrinkage is 1.3-1.7%). This work indicates that lightweight porous gamma-Y2Si2O7 ceramic could be applied as a promising high-temperature thermal insulator with low thermal conductivity and high temperature reliability. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
部门归属[wu, zhen ; sun, luchao ; wan, peng ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china ; [wu, zhen] univ sci & technol china, hefei 230026, peoples r china
关键词Porous Gamma-y2si2o7 Ceramic In Situ foam-gelcastIng Method Gelatin Low Thermal Conductivity Good High Temperature Performance
资助者National Natural Science Foundation of China [51032006, 51372252]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75078
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,Wan, Peng,et al. Preparation, microstructure and high temperature performances of porous gamma-Y2Si2O7 by in situ foam-gelcasting using gelatin[J]. CERAMICS INTERNATIONAL,2015,41(10):14230-14238.
APA Wu, Zhen,Sun, Luchao,Wan, Peng,Wang, Jingyang,&jywang@imr.ac.cn.(2015).Preparation, microstructure and high temperature performances of porous gamma-Y2Si2O7 by in situ foam-gelcasting using gelatin.CERAMICS INTERNATIONAL,41(10),14230-14238.
MLA Wu, Zhen,et al."Preparation, microstructure and high temperature performances of porous gamma-Y2Si2O7 by in situ foam-gelcasting using gelatin".CERAMICS INTERNATIONAL 41.10(2015):14230-14238.
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