Preparation of anhydrous lanthanum bromide for scintillation crystal growth

This paper reported an efficient and economical method for preparation of anhydrous LaBr3 for scintillation crystal growth. High purity anhydrous LaBr3 powders in large quantities were successfully obtained by stepped dehydration of LaBr3-7H2O using NH4Br as additive. Experiments revealed that addin...

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Published inJournal of rare earths Vol. 30; no. 12; pp. 1245 - 1248
Main Author 张彤 李红卫 赵春雷 余金秋 胡运生 崔磊 何华强
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2012
Subjects
anhydrous LaBr3
Crystal growth
Dehydration
Economics
Hydrolysis
LaBr3
LaBr3·7H2O
NH4Br
Optimization
Rare earth metals
rare earths
Scintillation
Stepped
制备条件
无水
晶体生长
水解过程
溴化
脱水温度
闪烁晶体
anhydrous LaBr3
dehydration
LaBr3·7H2O
NH4Br
rare earths
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Summary:This paper reported an efficient and economical method for preparation of anhydrous LaBr3 for scintillation crystal growth. High purity anhydrous LaBr3 powders in large quantities were successfully obtained by stepped dehydration of LaBr3-7H2O using NH4Br as additive. Experiments revealed that adding proper amount of NHaBr could effectively restrain the hydrolysis of LaBr3 during dehydration and thus decreased the yield of deleterious impurity of LaOBr. Optimum preparation conditions, including the amount of NH4Br in use, the dehydration temperature and atmosphere, were investigated by DTA/TG and water/oxygen analysis. The Raman characterization of the as-prepared anhydrous LaBr3 was also presented.
Bibliography:11-2788/TF
anhydrous LaBr3; dehydration; LaBr37H2O; NH4Br; rare earths
This paper reported an efficient and economical method for preparation of anhydrous LaBr3 for scintillation crystal growth. High purity anhydrous LaBr3 powders in large quantities were successfully obtained by stepped dehydration of LaBr3-7H2O using NH4Br as additive. Experiments revealed that adding proper amount of NHaBr could effectively restrain the hydrolysis of LaBr3 during dehydration and thus decreased the yield of deleterious impurity of LaOBr. Optimum preparation conditions, including the amount of NH4Br in use, the dehydration temperature and atmosphere, were investigated by DTA/TG and water/oxygen analysis. The Raman characterization of the as-prepared anhydrous LaBr3 was also presented.
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60214-2