氢氧化镧湿法氟化法合成氟化镧工艺研究  

Hydro-Fluorination Synthesis of Lanthanum Fluoride Using Lanthanum Hydroxide as Raw Materials

作　　者：李明来[1] 龙志奇[1] 朱兆武[1] 崔大立[1] 彭新林[1] 赵娜[1] 崔梅生[1] 黄小卫[1] 

机构地区：[1]北京有色金属研究总院有研稀土新材料股份有限公司,北京100088

出　　处：《稀有金属》2006年第3期348-352,共5页Chinese Journal of Rare Metals

摘　　要：采用了氢氟酸直接氟化氢氧化镧浆液的制备工艺,考察了工艺的可行性。研究了氢氟酸浓度、用量、反应温度、反应时间等因素对产物含氧量、氟化率和制备过程中过滤、洗涤的影响。通过差热分析、扫描电镜、X射线衍射等手段对产品的组成、形貌、结构等进行了研究。制备工艺为固液反应,工艺简单,产品分散性好,易过滤洗涤,质量稳定,工业可操作性强,流程短。A liquid-phase fluorination method for pre- paring lanthanum fluoride was studied. Lanthanum fluoride was prepared by droping hydrofluoric acid into lanthanum hydroxide. The effects of precipitated conditions such as HF added amount, HF initial concentration, stiring time and temperature on the residual ofoxygen and fluorination rate were studied. The composition, morphology and structure of the lanthanum fluoride were analyzed by means of TG-DTA analysis, SEM and XRD. The preparation method has such advantages as high fluorination rate, simple operation, easy industrialization, etc.

关 键 词：氟化镧 氢氧化镧 氢氟酸 氟化反应 

分 类 号：TQ461[化学工程—制药化工] O614.331[理学—无机化学]