The invention discloses a
glass film containing rare-earth-
ion-doped
calcium iodide microcrystalline and a preparation method thereof. The technical scheme is characterized in that the
glass film comprises the following compositions in percent by mole: 70-74 mol% of
germanium dioxide, 10-15 mol% of boric
oxide, 10-16 mol% of
calcium iodide, and 1-4 mol% of a rare-earth
iodide, wherein the rare-earth
bromide is one of
europium(II) iodide,
cerium (III) iodide and
terbium iodide. The advantages comprise that a
sol-gel technology is a low-temperature wet-chemical-process glass preparation technology, the glass is obtained through
hydrolysis of a precursor
raw material and a
polymerization chemical reaction process, the
film material can be prepared under a certain
liquid viscosity condition, and the low-temperature synthesis condition is capable of effectively preventing the iodide
raw material from being decomposed and volatilized; and because of volatilization and
decomposition of the
solvent, certain micropores are generated in the glass prepared through the
sol-
gel method, and the micropores provide good environment for generation of nanometer iodide
microcrystalline, and thus crystallized-particle nonuniformity and glass
devitrification caused by incomplete uniformity of melt-glass chemical compositions and
crystallization processing temperature are overcome to a certain degree.