LaCl_3:Ce^(3+)晶体生长用无水氯化镧的制备  

Preparation of Anhydrous Lanthanum Chloride for LaCl_3:Ce^(3+) Crystal Growth

作　　者：陈红兵[1] 周昌勇[1] 杨培志[2] 蒋成勇[1] 潘建国[1] 

机构地区：[1]宁波大学固体材料化学研究所新型功能材料及其制备科学国家重点实验室培育基地,宁波315211 [2]昆明物理研究所,昆明650223

出　　处：《人工晶体学报》2006年第4期686-691,共6页Journal of Synthetic Crystals

基　　金：浙江省科技攻关项目(2005C31029);宁波市重点博士科学基金项目(2005A610021);浙江省高校中青年学科带头人;浙江省"151人才工程"资助项目

摘　　要：本文报道了LaC l3:Ce3+晶体生长用无水氯化镧的氯化焙烧脱水制备方法。应用差热/热重分析研究了LaC l3.7H2O的脱水过程,以寻求避免发生水解反应的有效途径;以LaC l3.7H2O为初始原料,采用氯化氢保护下的焙烧脱水处理进行无水氯化镧的制备,通过系列实验掌握了氯化焙烧脱水处理的最佳工艺条件;为验证所制备无水氯化镧的纯度,采用该原料进行了LaC l3:Ce3+单晶生长。结果表明,在氯化焙烧脱水处理过程中,保持通入足量干燥氯化氢气体,控制焙烧温度于220~230℃,经过6~7h焙烧处理,能够制备出较高纯度的无水氯化镧,所获原料可成功地用于生长无色透明的LaC l3:Ce3+单晶。The preparation of anhydrous lanthanum chloride for LaCl3：Ce^3＋crystal growth by chlorinating sintering dehydration process is reported in this paper. The dehydration procedure of LaCl3·7H2O was investigated by DTA/TG analysis in order to explore an effective way to avoid the hydrolysis reaction. Using LaCl3·7H2O as the starting materials, anhydrous lanthanum chloride was prepared by the dehydration treatment in HCl atmosphere. The optimum conditions for the chlorinating sintering dehydration process had been obtained by a series of experiments, To confirm the purity of the anhydrous lanthanum chloride obtained, it had been used to grow LaCl3：Ce^3＋ single crystals. In the chlorinating sintering dehydration process, the anhydrous lanthanum chloride with high purity can be prepared by means of sintering LaCl3·7H2O at 220-230℃ for 6-7h in dried HCl atmosphere. The anhydrous lanthanum chloride is applied to grow colorless transparent LaCl3 ：Ce^3＋ single crystals successfully.

关 键 词：无水氯化镧 焙烧 脱水 晶体生长 

分 类 号：O614[理学—无机化学]