Highly Porous Zirconia Ceramic Foams with Low Thermal Conductivity from Particle-Stabilized Foams

被引：78

作者：

Huo, Wen-Long ^{[1
]}

Zhang, Xiao-Yan ^{[1
]}

Chen, Yu-Gu ^{[1
]}

Lu, Yu-Ju ^{[1
]}

Liu, Wen-Ting ^{[2
]}

Xi, Xiao-Qing ^{[1
]}

Wang, Ya-Li ^{[1
]}

Xu, Jie ^{[1
]}

Yang, Jin-Long ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

[2] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2016年 / 99卷 / 11期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

ceramic foams; zirconia; sodium dodecyl sulfate; ultra-high porosity; thermal conductivity; MICROSTRUCTURE; SURFACTANTS; FABRICATION; POROSITY; SIZE;

D O I：

10.1111/jace.14555

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：

Zirconia ceramic foams with ultra-high porosity of 96%-98% have been fabricated using sodium dodecyl sulfate (SDS) as the particle stabilizer of zirconia particles for the first time. The wet foams stabilized by zirconia particles are ultra-stable due to partially hydrophobic zirconia particles modified by SDS. Zirconia foams exhibit close cells with thin cell wall and small grain size. Increasing SDS concentration favors the foamability of the suspension, and further increases the porosity of ceramic foams. Zirconia ceramic foams with porosity of 98.1% have compressive strength of 0.26 +/- 0.05 MPa. Decreasing solid loading leads to the porosity of ceramic foams. The compressive strength could be improved significantly by increasing the sintering temperature. Zirconia ceramic foams with porosity of 97.9% has low thermal conductivity of 0.027 +/- 0.004 W(mK)(-1), which could be used as thermal insulation and refractory material.

引用

页码：3512 / 3515

页数：4

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