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2013•China CeramicsRequires access

Effect of Polyvinylpyrrolidone on the Stability of Aqueous Alumina Suspensions with Citric Acid

Pan Lij

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Abstract

Effect of polyvinylpyrrolidone on stability of aqueous alumina suspensions stabilized with polyvinylpyrrolidone was investigated. The results showed that the stability of alumina suspension with solids loading at 45 v% was significantly improved at a very low dosage(0.2 wt%) of CA/PVP, and the suspension appeared Newtonian fluid. As the solids loading increased, the suspensions had higher viscosity and were more sensitive to the pH values. The range of pH values, where the suspensions could be well dispersed, became narrow and there was an optimal pH value at which suspensions obtained best rheology.

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What this paper is about

Effect of polyvinylpyrrolidone on stability of aqueous alumina suspensions stabilized with polyvinylpyrrolidone was investigated. The results showed that the stability of alumina suspension with solids loading at 45 v% was significantly improved at a very low dosage(0.2 wt%) of CA/PVP, and the suspension appeared Newtonian fluid. As the solids loading increased, the suspensions had higher viscosity and were more sensitive to the pH values. The range of pH values, where the suspensions could be well dispersed, became narrow and there was an optimal pH value at which suspensions obtained best rheology.

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Available abstract

Effect of polyvinylpyrrolidone on stability of aqueous alumina suspensions stabilized with polyvinylpyrrolidone was investigated. The results showed that the stability of alumina suspension with solids loading at 45 v% was significantly improved at a very low dosage(0.2 wt%) of CA/PVP, and the suspension appeared Newtonian fluid. As the solids loading increased, the suspensions had higher viscosity and were more sensitive to the pH values. The range of pH values, where the suspensions could be well dispersed, became narrow and there was an optimal pH value at which suspensions obtained best rheology.

Key concepts: Polyvinylpyrrolidone, Suspension (topology), Citric acid, Rheology, Aqueous suspension, Aqueous solution, Viscosity, Materials science

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