Preparation and characterisation of BaTiO3 nanopowder by microwave assisted microemulsion method

摘要

Through the microwave assisted reverse microemulsion method, BaTiO3 nanopowders are prepared in 10 min by selecting water/OP-10/hexanol/cyclohexane reverse microemulsion system, Ba(NO3)(2) and tetrabutyl titanate as reactants. The effect of reaction temperature, reaction time, concentration of reactants and molar ratio of water and surfactant on the reaction was studied, and the prepared powders were characterised by X-ray diffraction, TEM and X-ray fluorescence analysis. The results show that cubic phase BaTiO3 powders of particle size about 50-80 nm with uniform distribution and good dispersion were prepared under atmospheric pressure in 10 min at 65 degrees C. The method has characteristics of lower reaction temperature, shorter reaction time, smaller particle size, narrow particle size distribution and good particle dispersion.