Preparation and electrical properties of fine strontium titanate powder from titanium alkoxide in a strong alkaline solution

Abstract

The particle size of the forming ceramic powder is related to the morphology of forming precipitated precursor. The rates of hydrolysis and condensation of titanyl acylate gel were slow because of the chelating action of acetic acid. Therefore, the particle size of the precursor gel was uniform and finer, and the formation rate of the powder was quicker. The powder obtained contained fine particles of size ∼ 0.04-0.05 μm and was readily sintered at 1423-1523 K. The dielectric constant and dissipation factor of strontium titanate were determined.