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2012•Journal of CeramicsRequires access

Rheological Property of Aqueous-based SiC Ceramic Slurry

Wang Jieli

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Abstract

The factors affecting the rheological property of aqueous-based SiC slurry,such as dispersants,pH,and particle ratio were studied.The results show that the order of dispersing ability of various dispersants was: tetramethyl-ammonium hydroxide(TMAH) Sodium hexametaphosphate(SHMP) Polyethylene glycol(PEG).The optimum amounts of TMAH,SHMP and PEG were 0.8wt.%,0.6wt.% and 1.0wt.%,respectively.The optimum pH value was 13 and the optimum particle ratio of F220/F1200 was 1.5.The viscosity of SiC slurry increased sharply after the solid volume fraction reached 50%.By optimizing the process parameters,the SiC ceramic slurry with good fluidity,50% solid volume fraction and 500 mPa·s viscosity was obtained.

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What this paper is about

The factors affecting the rheological property of aqueous-based SiC slurry,such as dispersants,pH,and particle ratio were studied.The results show that the order of dispersing ability of various dispersants was: tetramethyl-ammonium hydroxide(TMAH) Sodium hexametaphosphate(SHMP) Polyethylene glycol(PEG).The optimum amounts of TMAH,SHMP and PEG were 0.8wt.%,0.6wt.% and 1.0wt.%,respectively.The optimum pH value was 13 and the optimum particle ratio of F220/F1200 was 1.5.The viscosity of SiC slurry increased sharply after the solid volume fraction reached 50%.By optimizing the process parameters,the SiC ceramic slurry with good fluidity,50% solid volume fraction and 500 mPa·s viscosity was obtained.

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Available abstract

The factors affecting the rheological property of aqueous-based SiC slurry,such as dispersants,pH,and particle ratio were studied.The results show that the order of dispersing ability of various dispersants was: tetramethyl-ammonium hydroxide(TMAH) Sodium hexametaphosphate(SHMP) Polyethylene glycol(PEG).The optimum amounts of TMAH,SHMP and PEG were 0.8wt.%,0.6wt.% and 1.0wt.%,respectively.The optimum pH value was 13 and the optimum particle ratio of F220/F1200 was 1.5.The viscosity of SiC slurry increased sharply after the solid volume fraction reached 50%.By optimizing the process parameters,the SiC ceramic slurry with good fluidity,50% solid volume fraction and 500 mPa·s viscosity was obtained.

Key concepts: Dispersant, Sodium hexametaphosphate, Slurry, Polyethylene glycol, Materials science, Aqueous solution, Chemical engineering, Rheology

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