Articles
  • Synthesis and characterization of tetragonal barium titanate powders by an ion-exchange and hydrothermal process
  • Wei Zhanga, Huarui Xub,*, Guisheng Zhub and Aibing Yuc
  • a School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xian 710055, PR China b School of Materials Science & Engineering, Guilin University of Electronic Technology, Guilin 541004, China c Department of Chemical Engineering, Monash University, Clayton, Vic 3800, Australia
Abstract
Tetragonal barium titanate (BaTiO3) powder with a uniform size distribution was successfully prepared by an ion-exchange treatment followed by hydrothermal process, and with a high precursor concentration. Ion-exchange treatment of the bariumtitanium chloride led to the formation of the homogeneous Ba-Ti hydroxide sol. Then, hydrothermal (240 oC for 7 h) led to the preparation of BaTiO3 powders with a very narrow size distribution (90 ± 3 nm) and a very high tetragonal content (90%), which were confirmed respectively by scanning electron microscopy and differential scanning calorimetry. Further, using the regenerated resin to ion-exchange, the BaTiO3 yield reached 99%.

Keywords: BaTiO3, Ion-exchange, Hydrothermal, Tetragonal, Powder technology, Electronic materials.

This Article

  • 2015; 16(4): 372-375

    Published on Aug 31, 2015