Fabrication and properties of porous alumina ceramics with three different pore sizes

被引：16
|
作者：
Dong, Binbin [1 ]
Wang, Gang [1 ]
Yuan, Bo [1 ]
Han, Jianshen [1 ]
Chen, Kuo [1 ]
Li, Hongxia [1 ]
机构：
[1] Sinosteel Luoyang Inst Refractories Res Co Ltd, State Key Lab Adv Refractories, Luoyang 471039, Peoples R China
来源：
JOURNAL OF POROUS MATERIALS | 2017年 / 24卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Porous alumina ceramics; Drying methods; Pore size; Suspension emulsion; Direct foaming; Solid template; THERMAL-CONDUCTIVITY; MICROSTRUCTURE; STRENGTH; POROSITY;
D O I：
10.1007/s10934-016-0319-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Porous alumina ceramics with uniform total porosity (69.6-70.3%), spherical pores, and different pore size (22.9 +/- 10.3, 197.7 +/- 80.0 and 714.1 +/- 207.2 mu m) were prepared by using suspension emulsion, direct foaming, and solid template as pore forming mechanism, respectively and gelcasting technology. Different drying methods were selected according to the different pore forming agents. Pore size could significantly affect the mechanical and thermal properties. The compressive strength decreased evidently from 116.25 +/- 10.96 to 22.43 +/- 1.15 MPa and thermal conductivity of 1000 A degrees C increased from 0.28 +/- 0.01 to 0.58 +/- 0.01 W/(m K) with the increasing pore size (from 22.9 +/- 10.3 to 714.1 +/- 207.2 mu m).
引用
收藏
页码：805 / 811
页数：7
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