中文摘要：

摘要：以颜料级TiO2、分析纯无水CaCl2和金属钙为原料，探索一种真空钙热还原制备金属钛粉的新方法，并借助XRD，SEM／EDS等设备对产物成分和钛粉进行表征。结果表明，添加的CaCIz可有效地减弱烧结影响并增大了气一固反应界面有助于还原反应。当CaCl2与Ti02比例为1：4时，片状原料在1000℃下和钙蒸气充分反应6h，还原产物酸洗干燥后制备出低杂质含量的钛粉。粒度分布在10-20μm之间，粉末颗粒呈不规则形状，分布均匀且无大块团聚现象。

英文摘要：

Preparation of Ti powders by calciothermic reduction of titania and calcium chloride（AR） in vacuum furnace was investigated by XRD, SEM/EDS. The result indicates that calcium chloride was added which could effectively reduced the sintering effect and help to increase the gas-solid reduction reaction interface. The mass ratio of CaCl2 and TiO2 was about 1：4, and pieces were reduced by calcium vapor at 1273K for 6h. after leaching with hydrochloric acid, the Ti powders with low impurities was prepared. The Ti powders were irregular shape（10-20μm particle size） and the surface of powder was homogeneous and loose agglomeration.