| 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 Author | Wang, Jingyang(jywang@imr.ac.cn) |
| 2018-08-01 | |
| Source Publication | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
 |
| ISSN | 0955-2219 |
| Volume | 38Issue:9Pages:3347-3353 |
| Abstract | 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. |
| Keyword | Porous rare earth silicate High-temperature thermal insulator In-situ reactionfoam-gelcasting method High-temperature strength Low thermal conductivity |
| Funding Organization | National Key R&D Program of China ; Natural Science Foundation of China |
| DOI | 10.1016/j.jeurceramsoc.2018.02.027 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2017YFB0703201] ; Natural Science Foundation of China[51372252] ; Natural Science Foundation of China[51772302] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Ceramics |
| WOS ID | WOS:000433014200035 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/128080 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Jingyang |
| Affiliation | Chinese 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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