Porous mullite composite with controlled pore structure processed using a freeze casting of TBA-based coal fly ash slurries

T.Y. Yang, H.B. Ji, S.Y. Yoon, B.K. Kim and H.C. Park

Resources, Conservation & Recycling, 2010, vol. 54, issue 11, 816-820

Abstract: Porous ceramic composite with controlled “designer” pore structure has been prepared by a freeze casting route using a tertiary-butyl alcohol (TBA)/coal fly slurry system. Unidirectional aligned macropore channels were developed by controlling the solidification direction. Simultaneously, small sized dendrite-like pores formed in the outer walls of the pore channels. The compressive strength of the sintered porous composite increased as the porosity decreased, i.e. low porosity gave a high compressive strength. After sintering at 1500°C, the mullite composite with a porosity of 67% exhibited a compressive strength of ∼23MPa.

Keywords: Coal fly ash; TBA; Freeze casting; Porous; Mullite composite (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:54:y:2010:i:11:p:816-820

DOI: 10.1016/j.resconrec.2009.12.012

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