Direct synthesis of Y doped BaTiO3 powder by sol-precipitation method

作者：Cernea M^*

来源：Journal of Optoelectronics and Advanced Materials, 2009, 11(8): 1191-1195.

• Yttrium doped-barium titanate
• Sol-precipitation
• Dielectric properties

Ultra fine and homogeneous BaTiO3 doped with 0.5 at% yttrium powder was prepared by sol-precipitation method using barium acetate, titanium (IV) diisopropoxide bis-acetylacetonate and yttrium (III) butoxide as starting precursors. The effect of pH value on the precipitate formation from the sot is pointed out in this paper. The grain size of the precipitate was about 100-200 nm. The structural evolution of the precursor precipitate as function of temperature was investigated. Ba0.995Y0.005TiO3 single phase was obtained at 1300 degrees C. The ceramics manufactured from the as-prepared powder presented good dielectric characteristics (dielectric constant = 2152 and dielectric loss (tan delta) = 4.54% at the Curie temperature of 125 degrees C). These ceramics are expected to be useful in dielectric applications.

• 出版日期2009-8