Preparation of nanocrystalline ferroelectric CaBi2Ta2O9 by the urea method
| Title | Preparation of nanocrystalline ferroelectric CaBi2Ta2O9 by the urea method |
| Publication Type | Journal Article |
| Year of Publication | 2005 |
| Authors | Gaikwad, SP, Pasricha, R, Ravi, V |
| Journal | Ceramics International |
| Volume | 31 |
| Issue | 6 |
| Pagination | 773-775 |
| Date Published | JAN |
| Type of Article | Article |
| ISSN | 0272-8842 |
| Keywords | dielectric properties, Electron microscopy, ferroelectric properties, powders : chemical preparation |
| Abstract | A precipitate was formed when a aqueous solution of CaCl2, BiCl3, TaF5 and urea in stoichiometric ratio (total metal cations to urea ratio is 5) is heated on a water bath. This precipitate on decomposition at 600 degrees C yielded the nanocrystallites of ternary oxide CaBi2Ta2O9 (CBT) as confirmed by X-ray diffraction (XRD). Particle size and morphology was studied by transmission electron spectroscopy (TEM). Ferroelectric hysteresis loop parameters such as remnant polarization (P-r) and coercive field (E-C) were also determined. TEM investigations revealed that the average particle size of the polycrystalline powder is 70 nm. The room temperature dielectric constant was found to be 110. (c) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
| DOI | 10.1016/j.ceramint.2004.08.011 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 2.758 |