Preparation of Nanosized Barium Titanate Powder by a Direct Reactive Precipitation Method

Abstract:

Columnar crystaldendriteequiaxial dendritescolumnar crystalNanosized powder was synthesized by direct-reactive precipitation process using a stoichiometrical mixture of TiCl₄, BaCl₂ as the reactants while NaOH as precipitant. Under the ratio of Ba to Ti is 1.02, PH=13, three reaction temperature of 70°C, 80°C and 90°C were conducted respectively. Morphology and phase structure of powder were investigated, and the influence of reaction temperature on powder morphology was discussed. The result indicates that synthesized powder is single cubic BaTiO₃ and contains no impurities. BaTiO₃ powders generally show spherical, and average particle size decreases with increasing reaction temperature. When reaction temperature is 80°C, BaTiO₃ powder has best uniformity and dispersivity with the diameter of 80-100nm. The influence of reaction temperature on powder particle size can be attributed to the corporate contribution of nucleation and growth rate. Polyglycol as surface active agent has a significant effect in restraining agglomeration.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 454-457
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.454
• Online since: May 2013
• Authors: Hong Bo Li, Shu Yan Wu, Jing Wang, Chun Jie Li
• Keywords: Barium Titanate (BT), Direct-Reactive Precipitation Process, Morpholoy, Phase Structure, Reaction Temperature

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