Lee, J.
, Lee, S.
, Hackley, V.
and Paik, U.
(2003),
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 December 9, 2024)
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Influence of [Ba+Ca]/[Ti+Zr] Ratio on the Interfacial Property of (Ba, Ca)(Ti, Zr)O3 (BCTZ) Powders in an Aqueous Medium
Published
Author(s)
James Lee, S K. Lee, , U Paik
Abstract
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.Citation
Journal of the American Ceramic Society
Volume
86
Issue
No. 6
Pub Type
Journals
Keywords
aqueous processing, barium titanate, BCTZ, colloids, electrokinetics, electronic ceramics, perovskite, surface chemistry, titanates
Citation
Issues
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Created June 2, 2003, Updated October 12, 2021