Key to enhance thermoelectric performance by controlling crystal size of strontium titanate

摘要

One-step molten salt synthesis process was introduced to fabricate nano to micrometer sized SrTiO3 powders in which effects of synthesis temperature, oxide-to-flux ratios and raw materials on the generation of SrTiO3 powders were examined. 100 nm or above sized pure SrTiO3 particles were obtained at relatively lower temperature of 900 degrees C. Micro-sized rhombohedral crystals with a maximum size of approximately 12 mu m were obtained from SrCO3 or Sr(NO3)(2) strontium source with 1:1 O/S ratio.