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A Study on Aging Behaviour of Well-Dispersed Alumina Suspensions by Varying the Particle Size using Poly vinyl Butyral as Binder

Abstract

Understanding the influence of storage time on rheological properties of the alumina suspensions is very important in many applications and fields such as tape casting processing advance coating, ink-jet printing, ceramic engineering, forming process of nano-powders etc. A rheological study of the aging process of Alumina – polyvinyl butyral (Al-PVB) tape casting slurry has been carried out by means of a conventional couette device at constant low shear rate. The slurries taken for the experiment has shown that at low constant shear rate there exist viscosity profiles showing gradual increasing behavior with waiting time (age) variation. Moreover, interestingly in the beginning the raise of viscosity is seemed to be higher and the trend of the viscosity profile remained almost similar in both alumina powders taken for the experiment, however the rate and initial viscosity of the suspension A16SG is observed much more as compared to the suspension A17NE.

Deepak Sharma, Amit Mukherjee, Suresh Singh Chauhan

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