Anhydrous cerium-doped lanthanum bromide and preparation method thereof
A technology of cerium lanthanum bromide and hydrogen bromide, which is applied in the field of deep processing of rare earth materials, can solve the problems of difficult preparation of high-purity lanthanum bromide and cerium bromide, difficulty in growing large-sized crystals, waste of energy and time, and achieve large-scale Large-scale mass production, low production cost, consistent effect of cerium content
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[0015] The preparation method of the anhydrous cerium-doped lanthanum bromide of the present invention specifically includes the following steps, and the whole preparation process is carried out under protective atmosphere or vacuum conditions.
[0016] (1) A cerium source and a lanthanum source are reacted in the presence of bromide ions.
[0017] Wherein, the cerium source may be cerium acetate hydrate or cerium carbonate. Preferably, the cerium acetate hydrate is cerium acetate with 1.5 to 3 crystal waters, more preferably, the cerium acetate hydrate is Ce(CH 3 COO) 3 1.5H 2 O, Ce(CH 3 COO) 3 2H 2 O or Ce(CH 3 COO) 3 ·3H 2 O. Lanthanum source can be lanthanum oxide (La 2 o 3 ) or lanthanum carbonate (La 2 (CO 3 ) 3 ). The mass ratio of cerium source and lanthanum source is (0.1-2):(0.5-50).
[0018] Wherein, the bromide ion is in the form of hydrogen bromide gas or hydrobromic acid aqueous solution, that is, the bromide ion is derived from hydrogen bromide g...
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