The invention discloses a K2LaI5-doped
glass film containing
rare earth irons and a preparation method of the K2LaI5-doped
glass film. The K2LaI5-doped
glass film containing
rare earth irons is characterized by comprising the following components in percentage by mole: 69-72mol% of
niobium pentoxide, 10-20mol% of aluminum
oxide, 10-14mol% of K2LaI5 and 1-4mol% of
rare earth iodide, wherein the rare earth
iodide is one of
cerium iodide,
europium iodide,
terbium iodide and
praseodymium iodide. The K2LaI5-doped glass film containing rare earth irons has the advantages that a
sol-
gel method is a technology for preparing glass through a low-temperature wet-chemical method, and glass is obtained through the
hydrolysis of a precursor
raw material and a chemical
polymerization reaction process, so that the glass can be prepared into a
film material under certain
liquid viscosity, and the iodide raw materials can be effectively prevented from being decomposed and volatilized under a low-temperature synthesis condition; due to the volatilization and
decomposition of the
solvent, the glass prepared by using the
sol-
gel method can generate certain micropores in the material, and the micropores provide good environments for generating nanometer iodide microcrystallines, so that the defects of crystallized particle nonuniformity and glass
devitrification caused by nonuniformity of chemical components of the
molten glass and
crystallization treatment temperature can be overcome to a certain extent.