METHOD FOR PREPARING AMORPHOUS STRONTIUM TITANATE(SrTiO3) PRECURSOR

摘要

PURPOSE: Provided is a simplified method for preparing an amorphous strontium titanate precursor, from which strontium titanate ultrafine spherical particles having uniform Sr-Ti bonds and a narrow particle size distribution are obtained. CONSTITUTION: The method for preparing an amorphous strontium titanate(SrTiO3) precursor comprises: dissolving 1 mol of strontium nitrate(Sr(NO3)2) and 9-20 mol of urea(CO(NH2)2) into the least amount of water to form a mixed solution A; mixing 1 mol of titanium tetrachloride(TiCl4) with 4-6 mol of nitric acid(HNO3) and heating the mixture to form a mixed solution B; mixing the mixed solution A with the mixed solution B and carrying out the combustion of the resultant mixture at a furnace maintained at a temperature of 380-450 deg.C.