Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Tahsueh Rd., Hsinchu, Taiwan.
Inorg Chem. 2009 Oct 5;48(19):9180-4. doi: 10.1021/ic900854x.
This study reports the synthesis of morphology-controlled BaTiO(3) nanostructures such as spherical, cube-shaped and rod-shaped BaTiO(3) using a molten-salt synthesis method. This method synthesized products from a reaction of BaO/BaCO(3) and TiO(2) with a eutectic mixture of NaCl-KCl flux at 700 degrees C for 1 h. The experiment used powder X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy to investigate the structure and morphology of the products. Moreover, the current work also provides a proposed synthetic mechanism of BaTiO(3) in the molten salt to illustrate the in situ transformation mechanism of BaTiO(3) nanostructures in the reaction. The results of the study revealed that the initial shape of the titania and the dissolution rate of the initial precursors critically determine the shapes of the final products.
本研究采用熔融盐合成法合成了形貌可控的 BaTiO(3)纳米结构，如球形、立方体形和棒形 BaTiO(3)。该方法通过 BaO/BaCO(3)和 TiO(2)与 NaCl-KCl 共晶混合物在 700°C 下反应 1 小时合成产物。实验采用粉末 X 射线衍射、场发射扫描电子显微镜和透射电子显微镜研究了产物的结构和形貌。此外，本工作还提供了 BaTiO(3)在熔融盐中的合成机制，以说明反应中 BaTiO(3)纳米结构的原位转化机制。研究结果表明，钛的初始形状和初始前体的溶解速率对最终产物的形状具有关键影响。
