Influence of [Ba+Ca]/[Ti+Zr] Ratio on the Interfacial Property of (Ba, Ca)(Ti, Zr)O3 (BCTZ) Powders in an Aqueous Medium
James Lee, S K. Lee, Vincent A. Hackley, U Paik
We report on findings of the electrokinetic and solubility behavior of BCTZ powders having three different [Ba+Ca]/[Ti+Zr] ratios: 0.995, 1.000, and 1.005. Ba and Ca ions, occupying primarily A-sites on the perovskite lattice, dissolve during acid titration resulting in surface depletion of A-site cations in the surface region of BCTZ particles. The electrokinetics of colloidal BCTZ powders reflect changes in the surface chemistry that occur as a result of dissolution and adsorption/reprecipitation of surface ions. The factors affecting the electrokinetic behavior, such as [Ba+Ca]/[Ti+Zr] ratio and suspension pH, were investigated. Based on the results, a relationship between electrokinetic behavior and changes in surface chemistry as a function of the [Ba+Ca]/[Ti+Zr] ratio is proposed.
, Lee, S.
, Hackley, V.
and Paik, U.
Influence of [Ba+Ca]/[Ti+Zr] Ratio on the Interfacial Property of (Ba, Ca)(Ti, Zr)O<sub>3</sub> (BCTZ) Powders in an Aqueous Medium, Journal of the American Ceramic Society
(Accessed June 6, 2023)