Synthesis of SrBi_2Ta_2O_9 (SBT) powder by CSD process

In order to improve the solubility of Ta(CH_3CH_2OH)_5, Sr(CH_3COO)_2, Bi(NO_3)_3 in ethylene glycol, the effect of the four kinds of complexes such as acetate, ethanolamine, pyridine, mannitol on the stability of solutions and the phases structure of powders was investigated through comparative analysis. XRD, TG-DTA and TEM were used to determine the phases, morphology and pyrolysis process of the powders, and the results indicate that steady homogenous solution of strontium bismuth tantalum can be prepared by chemical solution decomposition process by adding ethanolamine as complex. Perovskite phase SBT power of about (100 nm) in diameter can be obtained after dried amorphous powder was treated at 300 ℃ for 30 min and annealed at 800 ℃ for 1 h. The pyrolysis process consists of volatilization of solvent, combustion of organic framework and crystallization of SBT powder.