MSA  Vol.2 No.7 , July 2011
Particle Size Control, Sinterability and Piezoelectric Properties of BaTiO3 Prepared by a Novel Composite-Hydroxide-Mediated Approach
ABSTRACT
The size of BaTiO3 particles was controlled by adjusting the molar ratio of the starting materials (BaCl2 + TiO2) to mineralizer (NaOH + KOH) during a composite-hydroxide-mediated approach using a novel hydrothermal reaction apparatus with a rolling system. The mean particle diameter decreased from 500 to 50 nm with a decrease in the (BaCl2 + TiO2)/(NaOH + KOH) molar ratio from 0.44 to 0.04. The powders were sintered by normal one-step sintering at 1200°C for 5 h and two-step sintering in which temperature was raised to 1200°C at first and then decreased to 1100°C and kept at 1100°C for 5 h. The BaTiO3 particles prepared with the (BaCl2 + TiO2)/(NaOH + KOH) molar ratio of 0.32 and 0.22 showed excellent sinterability and could be sintered to almost full theoretical density by both method. The sintered bodies obtained by both methods showed similarly excellent dielectric and piezoelectric properties.

Cite this paper
nullY. Xie, T. Kimura, S. Yin, T. Hashimoto, Y. Tokano, A. Sasaki and T. Sato, "Particle Size Control, Sinterability and Piezoelectric Properties of BaTiO3 Prepared by a Novel Composite-Hydroxide-Mediated Approach," Materials Sciences and Applications, Vol. 2 No. 7, 2011, pp. 757-763. doi: 10.4236/msa.2011.27104.
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