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High-strength porous mullite ceramics fabricated from particle-stabilized foams via oppositely charged dispersants and surfactants
Ren, Jiantao; Ying, Wei; Zhao, Jin; Xie, Jianjun; Zhou, Guohong; Shi, Ying; Wang, Shiwei
2019-04-01
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:5Pages:6385
SubtypeArticle
AbstractClosed-cell ceramics have attracted broad attention in many areas such as thermal insulation and radomes due to their high strength, low density, and moisture isolation. In this paper, closed-cell mullite ceramics were prepared from particle-stabilized foams via oppositely charged dispersants and surfactants. Mullite particles were dispersed via an anionic dispersant and then hydrophobically modified via a cationic surfactant. The surfactant with long hydrocarbon chains made the particles very hydrophobic, which contributed to the gelation of the particle-stabilized foam. Finally, high-strength porous mullite ceramics with closed cells were obtained. Typically, a compressive strength up to 27.3 MPa was obtained for ceramics with 75% porosity. This is higher than those fabricated by other processes due to the fine and homogeneous cells of the ceramics. We close with a discussion on the effects of the dispersant and surfactant concentration on the porosity, microstructure, and compressive strength of the porous mullite ceramics.
KeywordParticle-stabilized foam Gelcasting Porous mullite ceramics Compressive strength Cell size
DOI10.1016/j.ceramint.2018.12.125
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27236
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Ren, Jiantao,Ying, Wei,Zhao, Jin,et al. High-strength porous mullite ceramics fabricated from particle-stabilized foams via oppositely charged dispersants and surfactants[J]. CERAMICS INTERNATIONAL,2019,45(5):6385.
APA Ren, Jiantao.,Ying, Wei.,Zhao, Jin.,Xie, Jianjun.,Zhou, Guohong.,...&Wang, Shiwei.(2019).High-strength porous mullite ceramics fabricated from particle-stabilized foams via oppositely charged dispersants and surfactants.CERAMICS INTERNATIONAL,45(5),6385.
MLA Ren, Jiantao,et al."High-strength porous mullite ceramics fabricated from particle-stabilized foams via oppositely charged dispersants and surfactants".CERAMICS INTERNATIONAL 45.5(2019):6385.
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