Tailoring the microstructure of high porosity Si3N4 foams by direct foaming with mixed surfactants

被引：26

作者：

Du, Zhongpei ^{[1
,2
]}

Yao, Dongxu ^{[1
]}

Xia, Yongfeng ^{[1
]}

Zuo, Kaihui ^{[1
]}

Yin, Jinwei ^{[1
]}

Liang, Hanging ^{[1
]}

Zeng, Yu-Ping ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Beijing, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2019年 / 102卷 / 11期

基金：

中国国家自然科学基金;

关键词：

compressive strength; direct foaming; high porosity; mixed surfactants; silicon nitride; SILICON-NITRIDE FOAM; CERAMIC FOAMS; ADSORPTION; STABILITY;

D O I：

10.1111/jace.16599

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mixed surfactants were successfully applied to fabricate the highly porous Si3N4 ceramic foams by the direct foaming method. The oppositely charged surfactants mixed in slurries could combined into catanionic surfactant by the electrostatic attraction and facilitate the formation of ultra-stable foams. The microstructure of the Si3N4 ceramic foams, including pore structure, mean pore size, pore size distribution and porosity were tailored by varying the mixing ratio of surfactant, mixed surfactants concentration and solid content of the initial slurries. Si3N4 ceramic foams with porosity of 92%-97%, mean pore size of 140-240 mu m and compressive strength of 0.85-5.38 MPa were obtained by adjusting mixed surfactants between 0.1 and 0.4 wt% and solid content between 22 and 30 vol%. The compressive strength of Si3N4 ceramic foams in current work was much higher than most reported results.

引用

页码：6827 / 6836

页数：10

共 31 条

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