Combustion synthesis and properties of fine-particle dielectric oxide materials

Abstract

Fine-particle dielectric oxide materials, MTiO₃, MZrO₃(where M = Ca, Sr, Ba and Pb), Pb(Zr_0.53Ti_0.47)O₃ and Pb_0.92La_0.08(Zr_0.65Ti_0.35)_0.98O₃ have been prepared by the combustion of an aqueous solution, containing stoichio-metric amounts of the corresponding metal nitrate and tetraformyl triazine mixture, at 350 °C for a few minutes. The combustion-derived dielectric oxides are fine and have a large surface area (12–30 m²g^–1). The powders, when pelletized and sintered at 1200°C for 1 h achieved a 92–95% theoretical density.