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Electrophoretic Deposition of Ferroelectric Barium Titanate Thick Films and Their Dielectric Properties
Author(s) -
Nagai Masaharu,
Yamashita Kimihiro,
Umegaki Takao,
Takuma Yasuhisa
Publication year - 1993
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.1151-2916.1993.tb03720.x
Subject(s) - dielectric , materials science , barium titanate , electrophoretic deposition , ferroelectricity , curie temperature , acetylacetone , dielectric loss , deposition (geology) , composite material , analytical chemistry (journal) , mineralogy , inorganic chemistry , condensed matter physics , chemistry , optoelectronics , chromatography , ferromagnetism , coating , physics , biology , paleontology , sediment
Barium titanate thick films 10–70 μm thick were obtained using a unique electrophoretic deposition technique, which utilizes a mixed ethanol–acetylacetone suspension as the dispersive medium. The capacitance of the BaTiO 3 films was measured as 25–70 nF, at temperatures of up to 200°C, giving a dielectric constant of 4000–12000 and dielectric loss (tan δ) of 0.13–0.51. In the sintered films thus deposited, (111) orientation was observed, and the degree of orientation was found to increase with decrease of the thickness of the films. In so‐oriented films, the Curie point was confirmed to be near 120°C.