Producing Large Complex-Shaped Ceramic Particle Stabilized Foams

被引：31

作者：

Chuanuwatanakul, Chayuda ^{[1
]}

Tallon, Carolina ^{[1
,2
]}

Dunstan, David E. ^{[1
]}

Franks, George V. ^{[1
,2
]}

机构：

[1] Univ Melbourne, Dept Chem & Biomol Engn, Melbourne, Vic 3010, Australia

[2] DMTC, Def Mat Technol Ctr, Hawthorn, Vic 3122, Australia

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2013年 / 96卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

POLYVINYL-ALCOHOL; WET FOAMS; ALUMINA; SUSPENSIONS; TECHNOLOGY; ADSORPTION; BINDER; AL2O3;

D O I：

10.1111/jace.12294

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：

Highly porous ceramic foams can be produced by combining particle stabilized foams and gelcasting concepts. Sulfonate-type surfactants are selected to weakly hydrophobize the alumina surface and stabilize air bubbles in suspensions containing gelcasting additives, polyvinyl alcohol (PVA), and 2,5-dimethoxy-2,5-dihydrofurane (DHF). The aim of this work was to prepare large complex-shaped ceramic foam objects with homogeneous microstructure and high porosity. A key to avoiding drying cracks is to strengthen the wet green body via gelcasting. The influence of the amount of gelcasting additives on the mechanical strength of the ceramic foam green bodies is investigated as well as the effect of using cross-linking agent versus the addition of just a binder. The presence of a cross-linked polymeric network within the green body increases its mechanical strength and minimizes crack formation during drying.

引用

页码：1407 / 1413

页数：7

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