室温下直接合成超细四方相 BaTiO3 纳米粒子。

Department of Materials Sciences and Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao, Hebei Province, 066004, Peoples Republic of China.

Nanoscale Res Lett. 2011 Jul 23;6(1):466. doi: 10.1186/1556-276X-6-466.

A large quantity of ultrafine tetragonal barium titanate (BaTiO3) nanoparticles is directly synthesized at room temperature. The crystalline form and grain size are checked by both X-ray diffraction and transmission electron microscopy. The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized. The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature.

大量的四方钛酸钡（BaTiO3）纳米粒子在室温下直接合成。通过 X 射线衍射和透射电子显微镜检查晶体形态和晶粒尺寸。结果表明，已经合成了粒径小至 7nm 的钙钛矿纳米粒子。通过随温度变化的拉曼光谱研究了所制备的纳米粒子的相变，其表现出与体相 BaTiO3 材料相似的趋势。证实了纳米粒子在室温下具有四方相。