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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
Corresponding AuthorWang, Jingyang(jywang@imr.ac.cn)
2018-08-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume38Issue:9Pages:3347-3353
AbstractHigh-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.
KeywordPorous rare earth silicate High-temperature thermal insulator In-situ reactionfoam-gelcasting method High-temperature strength Low thermal conductivity
Funding OrganizationNational Key R&D Program of China ; Natural Science Foundation of China
DOI10.1016/j.jeurceramsoc.2018.02.027
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFB0703201] ; Natural Science Foundation of China[51372252] ; Natural Science Foundation of China[51772302]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000433014200035
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128080
Collection中国科学院金属研究所
Corresponding AuthorWang, Jingyang
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, High Performance Ceram Div, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
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.
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