Title: Porous ceramic from particle-stabilised foams via gelcasting

Authors: Jinlong Yang, Huang Lin, Xiaoqing Xi, Ke Zeng

Addresses: State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. ' State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. ' State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. ' State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Abstract: In this paper, a new method to prepare particle-stabilised foams by using short chain amphiphile valeric acid was reported. Quantitative analysis of the optical microscope pictures taken at different time of particle-stabilised foams indicated that they were ultrastable and almost did not ripen and coalesce. Porous ceramic (porosity > 0.85) from particle-stabilised foams was fabricated by the gelcasting technique. With the ultrastable property, longer idle time can be reached. The morphology of this kind of porous ceramic was also investigated and compared to the conventional porous ceramic fabricated by using long chain surfactant Triton X-114 to foam the suspensions.

Keywords: particle stabilisation; direct foaming; gelcasting; porous ceramic; particle-stabilised foams.

DOI: 10.1504/IJMPT.2010.031423

International Journal of Materials and Product Technology, 2010 Vol.37 No.3/4, pp.248 - 256

Published online: 03 Feb 2010 *

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