Premium
Dielectric Depression and Dispersion in Electrophoretically Fabricated BaTiO 3 Ceramic Films
Author(s) -
Yamashita Kimihiro,
Matsuda Motohide,
Inda Yasushi,
Umegaki Takao,
Ito Masayuki,
Okura Toshinori
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03072.x
Subject(s) - dielectric , materials science , ceramic , sintering , dispersion (optics) , curie temperature , composite material , layer (electronics) , condensed matter physics , optics , optoelectronics , ferromagnetism , physics
Dielectric depression and dispersion were observed in BaTiO 3 ceramic films fabricated by electrophoretic deposition followed by sintering. The dielectric constants were depressed down to 6800‐4600 around the Curie point ( T C ). The dielectric dispersion occurred above T C . These dielectric properties are attributable to a surface layer formed during sintering. XRD analysis indicated that the surface layer was a hexagonal‐like BaTiO 3 phase. A mixed solvent of acetylacetone and alcohol employed in the present work may have been responsible for the formation of the surface layer.