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

作者：Dong Binbin^*; Wang Gang; Yuan Bo; Han Jianshen; Chen Kuo; Li Hongxia

来源：Journal of Porous Materials, 2017, 24(3): 805-811.

DOI：10.1007/s10934-016-0319-4

• Porous alumina ceramics
• Drying methods
• Pore size
• Suspension emulsion
• Direct foaming
• Solid template

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).

• 出版日期2017-6
• 单位中钢集团洛阳耐火材料研究院有限公司