Dielectric Depression and Dispersion in Electrophoretically Fabricated BaTiO3 Ceramic Films期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Dielectric Depression and Dispersion in Electrophoretically Fabricated BaTiO3 Ceramic Films

Authors:	Kimihiro Yamashita Motohide Matsuda Yasushi Inda Takao Umegaki Masayuki Ito Toshinori Okura

Affiliation:	Department of Industrial Chemistry, Faculty of Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachioji, Tokyo 192–03, Japan;Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University, 2–1–1 Tsushima-Naka, Okayama 700, Japan;Department of Applied Chemistry, Faculty of Engineering, Kogakuin University, Nishi-Shinjyuku, Tokyo 163–91, Japan

Abstract:	Dielectric depression and dispersion were observed in BaTiO3 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 BaTiO₃ phase. A mixed solvent of acetylacetone and alcohol employed in the present work may have been responsible for the formation of the surface layer.

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