表面修饰的钛酸钡纳米粉体的制备

采用水热法制备出表面包裹有硬脂酸的钛酸钡钠米粉体，并运用一系列手段对其微结构进行了表征。结果表明：产物粒径较小，粒度分布较窄，单分散性较好，其表面为非极性，同时表现出良好的流动性能。认为钛酸钡纳米粉体表面极性的改变是由于其表面包裹了一层硬脂酸，并且包裹层降低了粉体间的相互作用力，从而提高了粉体的流动性。

The Preparation of Surface Modified BaTiO3 Powders

The nanosized BaTiO3powders modified with a layer of stearic acid were successfully prepared through the hydrothermal method and their microstructures were characterized. The results indicate that the products are of small crystal with small grain-size, narrow grain-size distribution and little agglomeration, meanwhile the polarity of the nanometer BaTiO3particles was greatly reduced and the powders had a better flowability. Because the surface of the nanometer BaTiO3powders was modificated with a layer stearic acid , which weakened the interaction between the particles of the powder.