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http://dx.doi.org/10.4191/KCERS.2005.42.2.123

Synthesis of Tetragonal Barium Titanate Powder by Solvothermal Technique  

Kwon, Soon-Gyu (Advanced Materials and Components Lab., Korea Institute of Ceramic Engineering and Technology)
Choi, Kyoon (Advanced Materials and Components Lab., Korea Institute of Ceramic Engineering and Technology)
Pee, Jae-Hwan (Icheon Institute, Korea Institute of Ceramic Engineering and Technology)
Choi, Eui-Seok (Icheon Institute, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.2, 2005 , pp. 123-126 More about this Journal
Abstract
Barium Titanate (BT) powders were synthesized by solvothermal method with an ethanol as a solvent. The average particle size was increased with the feedstock concentration: the size was 59 nm at $6.25{\times}10^{-2}$ M and 89 nm at 0.5 M. The sample obtained at 0.5 M concentration was analysed by Rietveld refinement and the mole fraction of tetragonal phase was $75.5\%$ and lattice parameter of tetragonal phase was a=0.3999 (nm), c=0.4032 (nm), and cubic phase was a=0.4015 (nm). TEM analysis for the samples with condition of annealing at $500^{\circ}C$ for I h showed that hydroxyl ions on oxygen sites were not found for these experimental conditions.
Keywords
Solvothermal synthesis; Barium titanate; Tetragonality; Rietveld refinement;
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