A
chemical solution preparation method for a
tungsten molybdate solid solution microcrystal is disclosed, which belongs to the field of
luminescent material with a
scheelite structure, and relates to a research about a novel
chemical solution method preparation for a
tungsten dimolybdate
solid solution luminescent microcrystal
host material. The
solid solution microcrystal provided by the invention is expressed by a chemical general formula A(WO4)1-x(MoO4)x, wherein A is Ca, Sr or Ba; and x is not less than 0 and not greater than 1. The
solid solution luminescent microcrystal of A(MoO4)x(WO4)(1-x) is obtained by adding A(NO3)2 solution, Na2MoO4 solution and Na2WO4 solution in corresponding amounts in a
polytetrafluoroethylene beaker respectively according to the
molar ratio of each
raw material needed to prepare the microcrystal of a target
system A(MoO4)x(WO4)(1-x) in a certain amount, stirring for 5 to 20 minutes at a normal temperature, then placing the
polytetrafluoroethylene beaker in a high-
pressure reactor; performing a
hydrothermal reaction for 15 to 30 hours at 60 to 180 DEG C, and naturally cooling to a
room temperature; centrifugally separating a precipitate, cleaning the precipitate by deionized water, then
drying at 100 to 150 DEG C. The preparation technique disclosed by the invention is simple in equipment and low in
reaction temperature; and the prepared luminescent microcrystal is pure in phase, uniform in
granularity, controllable in grain size, regular in shape, excellent in luminescent performance, and good in practicability.