Phenomenological Theory of High Permittivity in Fine‐Grained Barium Titanate
- 1 January 1966
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 49 (1) , 33-36
- https://doi.org/10.1111/j.1151-2916.1966.tb13144.x
Abstract
The anomalously high permittivity in fine‐grained ceramic barium titanate is explained by the absence of 90° twinning within the grains, giving rise to internal stresses as the ceramic cools below the Curie temperature. Using the Devonshire phenomenological thermodynamic method and a simplified model, the stresses involved are calculated. At these stress levels, the reduced strain calculated on this model agrees well with X‐ray data for the fine‐grained material. The limitations and possible developments of the proposed model are discussed.Keywords
This publication has 11 references indexed in Scilit:
- Microcrystalline BaTiO3 by Crystallization from GlassJournal of the American Ceramic Society, 1964
- Elastic and Piezoelectric Coefficients of Single-Crystal Barium TitanatePhysical Review B, 1958
- Microstructure of Barium Titanate CeramicsJournal of the American Ceramic Society, 1957
- Free energy, internal fields and ionic polarizibilities in BaTiO3Journal of Physics and Chemistry of Solids, 1957
- Triple Hysteresis Loops and the Free-Energy Function in the Vicinity of the 5°C Transition in BaTiPhysical Review B, 1956
- A Calculation of Physical Constants of Ceramic Barium TitanateJournal of the Physics Society Japan, 1956
- Effect of Firing Cycle on Structure and Some Dielectric and Piezoelectric Properties of Barium Titanate CeramicsJournal of the American Ceramic Society, 1955
- Dynamic Behavior of Domain Walls in Barium TitanatePhysical Review B, 1955
- XCVI. Theory of barium titanateJournal of Computers in Education, 1949
- Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen. I. Dielektrizitätskonstanten und Leitfähigkeiten der Mischkörper aus isotropen SubstanzenAnnalen der Physik, 1935