Synthesis of perovskite type compounds via different routes and their X-ray characterization

Abstract

Perovskite type compounds may be synthesized via different routes, which will yield nanocrystalline material, if certain temperatures are not exceeded while annealing, calcinating or decomposing. In the case of BaTiO 3 this temperature is at about 800°C. Solid state reactions, decomposition of metal organic compounds and sol-gel processing have been used to prepare BaTiO 3 and other perovskite type compounds. Sol-gel processes, followed by calcination, proved to be proper methods in preparing nanocrystalline powder because they need rather low temperatures during calcination. But not all sol-gel processes are suitable in the same manner. Lattice constants, resulting phases and properties may also depend on crystallite size or annealing temperature.