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Gelcasting of Al_2O_3 with TiO_2 Added: The Effects of Sintering Aid and Dispersant

Zhenjiang Wu

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Abstract

The gelcasting of Al2O3 was accomplished by means of the gelling reaction of monofunctional acrylamine and bifunctional N, N-methylenebisacrylamide. The effects of dispersant concentration, pH value and agitation time on the viscosity of the slurries were investigated. In this process, TiO2 was used as the sintering aid, and its effects on the densification and quality of obtained ceramics were observed. The results show that 97% of the relative density was achieved by ambient pressure sintering at 1300oC when 5% TiO2 was added into ceramics.

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What this paper is about

The gelcasting of Al2O3 was accomplished by means of the gelling reaction of monofunctional acrylamine and bifunctional N, N-methylenebisacrylamide. The effects of dispersant concentration, pH value and agitation time on the viscosity of the slurries were investigated. In this process, TiO2 was used as the sintering aid, and its effects on the densification and quality of obtained ceramics were observed. The results show that 97% of the relative density was achieved by ambient pressure sintering at 1300oC when 5% TiO2 was added into ceramics.

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Available abstract

The gelcasting of Al2O3 was accomplished by means of the gelling reaction of monofunctional acrylamine and bifunctional N, N-methylenebisacrylamide. The effects of dispersant concentration, pH value and agitation time on the viscosity of the slurries were investigated. In this process, TiO2 was used as the sintering aid, and its effects on the densification and quality of obtained ceramics were observed. The results show that 97% of the relative density was achieved by ambient pressure sintering at 1300oC when 5% TiO2 was added into ceramics.

Key concepts: Dispersant, Sintering, Slurry, Materials science, Ceramic, Relative density, Viscosity, Bifunctional

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