Barium Carbonate Phase on the Surfaces of Barium Titanate Particles and in Situ Transmission Electron Microscopy Observation of Its Decomposition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

Barium Carbonate Phase on the Surfaces of Barium Titanate Particles and in Situ Transmission Electron Microscopy Observation of Its Decomposition

Authors:	Hiromi Nakano Kazuyori Urabe Hiroyuki Ikawa

Affiliation:	Electron Microscope Laboratory, Ryukoku University, Seta Otsu, 520-2194, Japan;Department of Materials Chemistry, Ryukoku University, Seta Otsu, 520-2194, Japan;Department of Applied Chemistry, Kanagawa Institute of Technology, Atsugi-shi, 243-0292, Japan

Abstract:	A BaCO₃ phase is found on the surfaces of hydrothermally synthesized BaTiO₃ particles; it occurs as aggregates or small protuberances. A small proportion of the phase decomposes to BaO crystallites when heated by a convergent electron beam in a transmission electron microscope. The BaO and BaCO₃ crystallites disappear when they are irradiated successively by the convergent electron beam. The BaO crystallites and the BaCO₃ phase sublimate and/or react with BaTiO₃ crystals whose surface layers are deficient in Ba²⁺ ions.

Keywords:	barium titanate barium carbonate transmission electron microscopy surface