Effect of Water-soluble Epoxy Resin on Microstructure and Properties of Porous Alumina Ceramics by Gel-casting

doi:10.15541/jim20150137

Abstract

Abstract:

Porous alumina ceramics with high porosity were fabricated by gel-casting and mechanical foaming. Here, PIBM, a co-polymer of isobutylene and maleic anhydride, was used as both dispersant and gelling agent, and two kinds of surfactants were selected as the foaming agent. Then, the effect of DE211 (a water-soluble epoxy resin) on the microstructure and properties of porous alumina ceramics were studied systematically. The results showed that porous alumina ceramics with maximum porosity up to 92.4% was achieved by this method. With addition of DE211 epoxy resin from 0 to 0.5wt%, porosity of porous alumina ceramics slightly decreased and mean pore size decreased from 582 μm to 331 μm, but compressive strength increased from 0.5 MPa to 3 MPa. Besides, there is hardly collapse of cell wall in the porous ceramics. These results are ascribed to the reaction between epoxy group of DE211 and anhydride of PIBM that enhanced the gelling rate and stabilized the foam structure.

Key words: porous alumina ceramics, epoxy resin, surfactant, gel-casting, mechanical foaming

CLC Number:

TQ174

ZHANG Xiao-Qiang, SUN Yi, SHIMAI Shun-Zo, WANG Shi-Wei. Effect of Water-soluble Epoxy Resin on Microstructure and Properties of Porous Alumina Ceramics by Gel-casting[J]. Journal of Inorganic Materials, 2015, 30(10): 1085-1088.

Figures/Tables 4

Fig. 1 Effect of the addition of AMPHITOL 24B on the porosity of porous alumina ceramics (0.8vol% EMAL TD)

Fig. 2 Effect of DE211 epoxy resin on the porosity and compressive strength of porous alumina ceramics. (0.8vol%EMAL TD and 0.5vol% AMPHITOL 24B)

Fig. 3 Effect of DE211 epoxy resin on microstructure of porous alumina ceramics (0.8vol% EMAL TD and 0.5vol% AMPHITOL 24B) (a) 0; (b) 0.1wt%; (c) 0.3wt%; (d) 0.5wt%

Fig. 4 Effect of DE211 epoxy resin on the mean pore size of porous alumina ceramics. (0.8vol% EMAL TD and 0.5vol% AMPHITOL 24B)

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