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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1374 (February) (2010)  >  pp.141-146

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1374 (February) (2010)   pp.141 - 146 Next article>>

Solvothermal soft chemical synthesis and characterization of plate-like particles constructed from oriented BaTiO3 nanocrystals

Qi FENG1), Yoshie ISHIKAWA1), Yoji MAKITA2) and Yuichi YAMAMOTO3)
1) Department of Advanced Materials Science, Faculty of Engineering, Kagawa University
2) National Institute of Advanced Industrial Science and Technology
3) Konoshima Chemical Co. Ltd.


  Plate-like BaTiO3 particles with a size of about 200 nm in thickness and 3 μm in width were prepared by using a novel solvothermal soft chemical process in ethanol and water-ethanol mixed solvents. A layered titanate of H1.07Ti1.73O4 with a lepidocrocite-like structure and plate-like nanoparticle morphology was used as the precursor, and solvothermally treated in the Ba(OH)2 solution to prepare the BaTiO3 nanoparticles. The formation reaction, particle morphology, nanostructure, and crystal-axis-orientation of the plate-like BaTiO3 nanoparticles were studied by XRD, FE-SEM, and TEM. The plate-like BaTiO3 nanoparticles are formed by an in situ topotactic structural transformation reaction. The crystallinity and particle morphology can be controlled by changing the fraction of ethanol in the solvent, Ba(OH)2 concentration, and reaction temperature. The plate-like BaTiO3 nanoparticles are polycrystalline particles constructed from spherical nanocrystals which are arranged in the same crystal-axis orientation in each plate-like particle, and show a high degree orientation in [110] direction, being suitable for preparing oriented BaTiO3 ceramic materials with high performance.


Keyword:
BaTiO3, Crystal-axis orientation, Plate-like nanoparticle, Topotactic reaction

Received: October 21, 2009
Accepted: December 17, 2009 , Published online: February 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan

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