中文摘要：

以BaCl2·2H2O、TiCl4为反应物，NaOH为矿化剂，Dy2O3为添加剂，水热合成了镝掺杂钛酸钡纳米粉体。运用X-射线衍射（XRD）、扫描电镜分析（SEM）等手段研究了镝的掺杂形式、粉体的粒度、微观形貌，讨论了水热处理温度和时间对产物的影响。结果表明，在220-280℃下水热反应10～16h，获得粒径为89nm的Dy掺杂BaTiO3粉体。所得粉体晶相单一，纯度高，发育完整，团聚少；微量Dy掺杂时，发生Ba位取代，掺杂量较高时，部分Dy^3＋占据Ti^4＋的位置。

英文摘要：

Using BaCl2·2H2O,TiCl4 as the basic raw materials, NaOH as mineralizer and Dy2O3 as additive, dysprosium doped barium titanate nanometer powders were prepared by the hydrothermal method. Doping types of dysprosium, crystallite and micro-appearance were analyzed by means of XRD and SEM. And the effects of temperature and time of hydrothermal process on products were also discussed. Dysprosium doped barium titanate nanometer particles with the particle size of 89 nm, which are highly pure, well-crystallized, little reunited, are prepared at the condition of 220-280℃, 10-16 h. Ba site is substituted by Dy if a little Dy2O3 is doped but when the Dy2O3 contents increases, some Dy^3＋ ions would take up the positions of Ti^4＋.