Barium titanate (BaTiO3) was synthesized and sintered by microwave processing at 2.45 GHz. Appropriate amounts of BaCO3 and TiO2 were used as starting materials for the synthesis. BaTiO3 phase was obtained by heating the precursors in a multi-mode microwave cavity at 1450°C for just 25 minutes. The synthesis and sintering were carried out in air. A relative density of 97% was obtained. By contrast, it was found that to achieve the same densification, it required 4 hours of soaking at 1450°C in a conventional sintering process. The dielectric properties show the abrupt discontinuities in dielectric constant vs. temperature plots; typical properties of first order transitions. Above the Curie temperature the dielectric constant follows Curie-Weiss law with Curie constant C=1.3-1.4x105°C.
|Original language||English (US)|
|Number of pages||5|
|Journal||Journal of Ceramic Processing Research|
|State||Published - Dec 1 2002|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites