Surface modification of BaTiO3 with yttrium, and dissolution and adsorption/precipitation behaviors of BaTiO3
- Authors
- Lee, Seung-Mi; Lee, Sangkyu; Cho, Chae-Woong; Paik, Ungyu; Kim, Dae-Hwan; Na, Eun-Sang; Park, Jea-Gun
- Issue Date
- Dec-2006
- Publisher
- SPRINGER
- Keywords
- barium titanate; yttrium coated BaTiO3; dissolution; passivation
- Citation
- JOURNAL OF ELECTROCERAMICS, v.17, no.2-4, pp.355 - 358
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ELECTROCERAMICS
- Volume
- 17
- Number
- 2-4
- Start Page
- 355
- End Page
- 358
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/180688
- DOI
- 10.1007/s10832-006-7061-2
- ISSN
- 1385-3449
- Abstract
- An attempt was made to retard the dissolution of Ba ions from BaTiO3 by coating Y compounds on the BaTiO3 particle surface. A hysteresis in the electrokinetic behavior of as-received BaTiO3 occurred during sequential acid and base titrations, while there was no hysteresis in the Y-coated BaTiO3. In the bare BaTiO3, dissolved Ba ions are adsorbed and/or precipitated onto the surface during sequent base titration to yield a more positively charged Ba-rich phase on top of the Ba-depleted lattice. On the contrary, the dynamic mobility of Y-coated BaTiO3 during base titration closely followed the corresponding acid titration, providing that the starting surface of Y-coated BaTiO3 and the surface after acid-base treatment was the same. It is suggested that Y compounds on the BaTiO3 particles retard the dissolution of Ba ions from BaTiO3.
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