A novel aqueous gel-casting for fabricating Al2O3-bonded fibrous mullite ceramics

doi:10.1016/j.jallcom.2019.152009

CORC > 金属研究所 > 中国科学院金属研究所

	A novel aqueous gel-casting for fabricating Al2O3-bonded fibrous mullite ceramics
	Yuan, Lei 2; Liu, Zhenli 2; Hou, Xinghui 3; Tian, Chen 2; Zhu, Qiang 1; Wang, Shaogang 4; Ma, Beiyue 2; Yu, Jingkun 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-11-30
卷号	811 页码:7
关键词	Mullite Porous ceramic Gel-casting rho-Al2O3 Mullite fibers
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.152009
通讯作者	Yu, Jingkun(yujk@smm.neu.edu.cn)
英文摘要	Al2O3-bonded fibrous mullite ceramics with high porosity have been prepared by a novel aqueous gel-casting method using the rho-Al2O3 and mullite fibers as raw materials and the deionized water as hydration agent. A bird nest structure with three-dimensional reticular skeleton was established by the fibers to ensure having a certain mechanical strength. The effects of the amount of mullite fibers on the properties of porous ceramic including phase composition, microstructure, sintering behavior, mechanical and thermal properties were investigated. The results showed that the fabricated Al2O3-bonded fibrous mullite ceramic had high porosity of 66.9%-78.6%, low density of 0.70 g/cm(3) to 1.17 g/cm(3), low thermal conductivity of 0.236 W/mK to 0.479 W/mK, and relatively high compressive strength of 0.80 MPa-2.78 MPa. With increasing the amounts of mullite fiber, the apparent porosity increased, the bulk density and thermal conductivity decreased. When the ratio of mullite fibers was 67%, the porous ceramic had the maximum porosity of 78.6%, the minimum thermal conductivity of 0.236 W/mK, and the relatively high compressive strength of 1.12 MPa, which could fully meet the application requirements of the thermal insulation materials. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[51974074] ; National Natural Science Foundation of China[51874083] ; National Natural Science Foundation of China[51404056] ; Fundamental Research Funds for the Central Universities of China[N182504009]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000487657000038
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/135454]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yu, Jingkun
作者单位	1.Univ New South Wales, Mark Wainwright Analyt Ctr, Electron Microscope Unit, Sydney, NSW 2032, Australia 2.Northeastern Univ, Minist Educ, Key Lab Ecol Met Multimetall Mineral, Shenyang 110819, Liaoning, Peoples R China 3.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Lei,Liu, Zhenli,Hou, Xinghui,et al. A novel aqueous gel-casting for fabricating Al2O3-bonded fibrous mullite ceramics[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,811:7.
APA	Yuan, Lei.,Liu, Zhenli.,Hou, Xinghui.,Tian, Chen.,Zhu, Qiang.,...&Yu, Jingkun.(2019).A novel aqueous gel-casting for fabricating Al2O3-bonded fibrous mullite ceramics.JOURNAL OF ALLOYS AND COMPOUNDS,811,7.
MLA	Yuan, Lei,et al."A novel aqueous gel-casting for fabricating Al2O3-bonded fibrous mullite ceramics".JOURNAL OF ALLOYS AND COMPOUNDS 811(2019):7.