The effect of wet foam stability on the microstructure and strength of porous ceramics

doi:10.1016/j.ceramint.2017.09.169

	The effect of wet foam stability on the microstructure and strength of porous ceramics
	Zhao, Jin 1; Yang, Chi 2; Shimai, Shunzo ; Guan, Xiupeng 3; Zhou, Guohong 4; Zhang, Jian 4; Liu, Juan 4; Wang, Shiwei 4
刊名	CERAMICS INTERNATIONAL
	2018
卷号	44 期号:1 页码:269
关键词	Direct foaming Foam stability Porous ceramics Cell size Compressive strength
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2017.09.169
英文摘要	Wet foam stability is of prime importance in fabricating porous ceramics with the desired microstructure and mechanical properties. In this research, wet foams were fabricated via direct foaming after separately adding an anionic surfactant (TLS) and a cationic surfactant (DTAC) into alumina slurries with a copolymer of isobutylene and maleic anhydride (PIBM) as both the dispersant and the gelling agent. The foam stability was evaluated by a stability analyzer. The bubble size rapidly increased in the wet foam with TLS as the foam stabilizer and many large bubbles appeared within 60 min. The wet foam containing DTAC was very stable. Cationic DTAC increased the hydrophobicity of alumina particles by interacting with the anionic PIBM adsorbed on the particles. The hydrophobically modified particles acted as the foam stabilizer and enhanced the wet foam stability. Furthermore, the fast gelling speed of the slurry containing DTAC also enhanced the wet foam stability. The average cell size of the ceramic with 82.9% porosity from the wet foam with TLS was 188 gm and the compressive strength was 9.7 MPa. The counterparts from the wet foam with DTAC were 54 pm of average cell size and 18.1 MPa of compressive strength. The superior stability of wet foam brought about a smaller cell size and higher strength of the resultant ceramic.
学科主题	Materials Science, Ceramics
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000416877900038
资助机构	This work was supported by National Key R & D Program of China (2017YFB0310501) and Science and Technology Commission of Shanghai Municipality (14XD1421200). ; This work was supported by National Key R & D Program of China (2017YFB0310501) and Science and Technology Commission of Shanghai Municipality (14XD1421200).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24609]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent & Optofunct Adv Inorgan Mat, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Inst Space Long March Vehicle, Beijing 100076, Peoples R China 4.Beijing LDS Technol Co LTD, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Jin,Yang, Chi,Shimai, Shunzo,et al. The effect of wet foam stability on the microstructure and strength of porous ceramics[J]. CERAMICS INTERNATIONAL,2018,44(1):269, 274.
APA	Zhao, Jin.,Yang, Chi.,Shimai, Shunzo.,Guan, Xiupeng.,Zhou, Guohong.,...&Wang, Shiwei.(2018).The effect of wet foam stability on the microstructure and strength of porous ceramics.CERAMICS INTERNATIONAL,44(1),269.
MLA	Zhao, Jin,et al."The effect of wet foam stability on the microstructure and strength of porous ceramics".CERAMICS INTERNATIONAL 44.1(2018):269.