The Effect of pH on the Suspension Properties and Homogeneity of Cast Green Bodies of Fine BaTiO3 in Suspending Aqueous Medium

Abstract

Factors affecting the inter-particle forces between the colloidal BaTiO₃ particles were investigated in order to stabilise the suspension system for casting homogenous green bodies. Rheological measurements taken to assess the stability of BaTiO₃ particles against fluctuation in aqueous medium were correlated with the Electro-kinetic Sonic Amplitude (ESA) to study the behaviour Electro-kinetic behaviour of the suspension. The aging kinetics of BaTiO₃ in aqueous systems was also monitored by ESA and rheological measurements. The analysis of the supernatant solutions from suspensions showed that the concentration of Ba²⁺ ions in solution increased with decrease of the initial pH of the suspension.