A mechanistic study on efficient room temperature sonocolloidal obtainment of SrTiO3 nanocrystals

Abstract

Titanate-based perovskite powders are the most widely used materials for fabrication of multilayered ceramic capacitors and thus are of significant importance. They have been synthesized by two approaches including solid-state and wet chemical processing methods. Synthesis temperature, cost of preparation and quality of synthesized powders are key factors favoring the process. Here, a new ultrasound-assisted precipitation approach is introduced which is able to obtain the quality perovskite nanocrystals such as strontium titanate, barium titanate and so on at room temperature. The obtained powder products were characterized by DTA/TGA, FT-IR, XRD, SEM, EDAX and TEM. The results indicate the room temperature formation of highly pure monosized spherical nanoscale crystals which are loosely agglomerated in nature. It is tried to add the science, mechanism involved in the synthesis and its reaction pattern to the literature along with discussing the cause of low temperature obtainment of the perovskite powder products. The approach described in the current work has the capability to be a general strategy for the synthesis of perovskite materials and essential potentials for large-scale production purposes as it is facile, low temperature and cost-effective.

Keywords

• Strontium titanate
• Barium titanate
• Perovskite
• Ultrasonication
• Precipitation
• Room temperature synthesis