Effect of surrounding polydimethylsiloxane frame and substrate on drying behavior of aqueous alumina suspensions

被引：1

作者：

Jiao, Lanqing ^{[1
,2
]}

Su, Bo ^{[1
]}

Meng, Junhu ^{[1
]}

Han, Jiesheng ^{[1
]}

Wang, Honggang ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou, Gansu, Peoples R China

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

来源：

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2018年 / 15卷 / 06期

基金：

中国国家自然科学基金;

关键词：

alumina; cracks; cracking; drying; substrates; suspensions; STABILIZED-ZIRCONIA SLURRY; NANOPARTICLE FILMS; THIN-FILMS; CRACK; STRESS; FABRICATION; PARTICLES; MECHANISM; GELS;

D O I：

10.1111/ijac.13013

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 drying behavior of aqueous alumina suspensions surrounded with and without polydimethylsiloxane (PDMS) frames was studied. The capillary stress generated in the bodies was measured insitu using a cantilever deflection method. The relationship between the capillary stress and the formation of cracks was discussed. Compared with the suspensions dried without surrounding PDMS frames, the drying rates of the suspensions were significantly decreased by the surrounding PDMS frames. By drying a suspension on a strong hydrophilic substrate, the PDMS frame hardly reduced the capillary stress. When drying the suspension on a hydrophobic or weak hydrophilic substrate, the elastic deformation of thick PDMS frames could effectively release the capillary stress and therefore crack-free ceramic green bodies could be obtained.

引用

页码：1502 / 1509

页数：8

共 31 条

[11] Sol-gel fabrication of compact, crack-free alumina film [J].