CAJ | 학술논문

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。
적요：이안료급TiO2、분석순무수CaCl2화금속개위원료，탐색일충진공개열환원제비금속태분적신방법，병차조XRD，SEM／EDS등설비대산물성분화태분진행표정。결과표명，첨가적CaCIz가유효지감약소결영향병증대료기일고반응계면유조우환원반응。당CaCl2여Ti02비례위1：4시，편상원료재1000℃하화개증기충분반응6h，환원산물산세간조후제비출저잡질함량적태분。립도분포재10-20μm지간，분말과립정불규칙형상，분포균균차무대괴단취현상。
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.