Hydrothermal Synthesis of Tetragonal Barium Titanate from Barium Chloride and Titanium Tetrachloride under Moderate Conditions |
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Authors: | Huarui Xu Lian Gao Jingkun Guo |
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Affiliation: | Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China |
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Abstract: | Tetragonal BaTiO3powders were prepared hydrothermally at 240°C, in only 12 h, using BaCl2·2H2O and TiCl4, which are rather easy to manipulate. Characterization via X-ray diffractometry, scanning electron microscopy, Brunauer–Emmett–Teller analysis, and differential scanning calorimetry confirmed that increasing the NaOH excess concentration (from 0.5 M to 2.0 M ) and decreasing the initial TiCl4concentration (from 0.625 M to 0.15 M ) promotes the formation of tetragonal BaTiO3powders. After reaction, the powders were proved to be phase-pure BaTiO3, with no impurities, such as Cl− and CO32−. |
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Keywords: | barium titanate synthesis microstructures |
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