空心钛酸钡的制备及其形成机理

doi:10.11962/1006-4990.2020-0141

Abstract

Abstract:

Barium titanate powders with tetragonal phase polymorph and hollow morphology were successfully synthesized by hydrothermal synthesis using titanium dioxide（TiO₂） and eight hydrated barium hydroxide [Ba（OH）₂·8H₂O] as raw materi-als.The morphologies,structure and polymorph of the products were characterized by transmission electron microscopy（TEM）and X-ray diffraction（XRD）,and the formation mechanism of hollow barium titanate were discussed in detail through the study of the dynamic change of the structure and polymorph of barium titanate powders with time in the reaction process.Effects of different reaction temperature and barium concentration on the crystallization and growth of barium titanate were also investigated.Results showed that the reaction temperature and the barium concentration affected the crystal structure and morphology of barium titanate powders,and then the formation mechanism of hollow barium titanate was proposed.Under the conditions of reaction temperature of 180 ℃ and barium concentration of 3.0 mmol/L,uniform particle size distribution of hol-low barium titanate powders with tetragonal phase polymorph could be obtained.

Key words: hollow barium titanate, crystallization, titanium dioxide

CLC Number:

TQ132.35

Wu Yali,Wu Yihan,Zhang Ruimin,Shi Xiaoyu,Dong Xin. Preparation and formation mechanism of hollow barium titanate[J]. Inorganic Chemicals Industry, 2021, 53(2): 51-54.

Figures/Tables 6

References 14

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Inorganic Acid-Base-Salt Committee of CIESC

Preparation and formation mechanism of hollow barium titanate

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