The invention relates to a production method of a
yttrium-
lutetium-
cerium oxide used for
scintillation crystals, and belongs to the technical field of extraction and separation of
rare earth. The production method comprises the following steps: (1) evenly mixing reverse extraction solutions of three kinds of
rare earth ions according to a stoichiometric ratio of the three
rare earth elements of
yttrium,
lutetium and
cerium, regulating a solution pH value to be 2-3 by means of
ammonium hydroxide, and conducting heating to obtain an a solution; (2) producing an
oxalic acid solution according toa
molar ratio,
ranging from 1:1.8 to 1:2.2, of total rare earth to a precipitator
oxalic acid, and heating the
oxalic acid solution to obtain a b solution; (3) slowly adding the a solution into the bsolution under a stirring condition, conducting stirring, allowing standing and aging for 3-6 h, and conducting filtering to obtain a
yttrium-
lutetium-
cerium oxalate sediment; and (4) firing the yttrium-lutetium-
cerium oxalate sediment in a
muffle furnace at 800-1200 DEG C for 2-4 h to obtain yttrium-lutetium-
cerium oxide powder. The yttrium-lutetium-
cerium oxide powder produced through the production method of the yttrium-lutetium-
cerium oxide used for the
scintillation crystals has the advantages that the rare earth elements are evenly distributed, each element content is precise and adjustable, and the like; and a
raw material can be provided for production of the
scintillation crystals of
LYSO, LuYAP and the like.