Hydrothermal Synthesis and Crystal Growth Studies of BaTiO3 Using Ti Nanotube Precursors

详细信息    查看全文

• 作者：Florentina Maxim ; Paula Ferreira ; Paula M. Vilarinho ; Ian Reaney
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：September 3, 2008
• 年：2008
• 卷：8
• 期：9
• 页码：3309-3315
• 全文大小：378K
• 年卷期：v.8,no.9(September 3, 2008)
• ISSN：1528-7505

文摘

The hydrothermal synthesis of barium titanate particles by reaction of titanate layered nanotubes and barium hydroxide in aqueous solution at 90, 110, and 200 °C from 1 to 24 h has been studied. Anisotropic growth of barium titanate particles was observed when the synthesis temperature was 90 °C resulting in the formation of pseudo-cubic BaTiO₃ single-crystal particles with a “wild”-type dendritic shape. Synthesis at 110 °C led to the formation of round-shaped, pseudo-cubic, and tetragonal BaTiO₃ particles. At 200 °C, single-crystal barium titanate “seaweed”-type dendritic particles with predominantly tetragonal structure were obtained. This study demonstrates that the anisotropic growth of barium titanate crystals can be controlled by manipulating the temperature and time of reaction and highlights the influence of the synthesis parameters on the anisotropic growth of BaTiO₃ crystals under hydrothermal conditions when using layered titanates with nanotube morphology as Ti precursor.