Strontium zirconate and strontium titanate ceramics for high-voltage applications: Synthesis, processing, and dielectric properties

The synthesis, processing, and electrical properties of SrZrO3 and SrTiO3 materials have been examined. Phase-pure powders of SrZrO3 and SrTiO3 materials were synthesized using the Pechini method. Powder processing routes that used water and 2-propanol as carrier fluids were developed to achieve high green densities, which resulted in sintered densities of > 99% of the theoretical density. The relative permittivity and average breakdown strength for carefully processed SrZrO3 were 60 and 40 V/mum; the corresponding values for SrTiO3 were 400 and 35 V/mum. The higher breakdown strengths suggest that these materials can be used in high-voltage capacitor applications.