关键词: Bi₄Ti₃O₁₂, 熔盐, 工艺参数, 显微形貌

Abstract: The influences of processing parameters on Bi₄Ti₃O₁₂ powder prepared by a molten salt method were studied. The results obtained
indicate that the powder characteristics are greatly influenced by the synthesizing temperature, type and quantity of the salts used.
In chloride salt, Bi₄Ti₃O₁₂ particles grow by the Ostwald ripening mechanism, their dimension increases with increasing temperatures,
showing a circular platelike morphology. The powder prepared in sulfate salt has larger particle size and more irregular platelike morphology
than that in the chloride salt. As the Bi₄Ti₃O₁₂ precursor to salt ratio is less than 1, the grain size decreases with increasing
sulfate salt quantity, at the same time the particle morphology becomes more irregular. Bi₄Ti₃O₁₂ powder with specific particle size
and morphology can be obtained by adjusting the processing parameters.

Key words: Bi₄Ti₃O₁₂, molten salt, processing parameter, morphology