Preparation method of glass film containing rare-earth ion doped barium iodide microcrystals

Abstract

The invention discloses a preparation method of a glass film containing rare-earth ion doped barium iodide microcrystals. The preparation method is characterized in that a raw material for preparing the glass film comprises the following components by molar percent: 63 to 72 percent of tetraethoxysilane, 5 to 8 percent of aluminum tri-sec-butoxide, 7 to 12 percent of purity germanium tetraethoxide, 10 to 16 percent of barium iodide and 1 to 4 percent of rare earth iodide, wherein the rare earth iodide is one of europous iodide, cerium iodide or terbium iodide. The preparation method has the advantages that a sol-gel method is a low-temperature wet-chemical-method glass preparation technology, the glass is obtained by virtue of the hydrolysis and polymerization chemical reaction process of the precursor raw material and can be made into a film material under certain liquid viscosity, and the low-temperature synthetic condition can effectively prevent the decomposition and volatilization of the iodide raw material; for the glass prepared by the sol-gel method, micropores are formed in the materials due to the volatilization and decomposition of the solvents, and the micropores provide a good environment for the growth of nano iodide microcrystals, so that the non-uniformity of crystallization particles and the devitrification of the glass, caused by the incomplete uniformity of chemical components and devitrification treatment temperature of the molten glass, can be overcome to a certain extent.

Description

technical field [0001] The present invention relates to a kind of rare earth ion-doped microcrystalline glass thin-film preparation technique, relate in particular to a kind of containing divalent europium ion (Eu 2+ ), cerium ion (Ce 3+ ), terbium ions (Tb 3+ ) doped barium iodide (BaI 2 ) Sol-gel preparation method of microcrystalline glass film. Background technique [0002] Scintillation material is a photofunctional material that can emit visible light under the excitation of high-energy rays (such as x-rays, γ-rays) or other radioactive particles, and can be widely used in nuclear medicine diagnosis, security inspection, anti-terrorism, high-energy physics and geological exploration and other fields. In recent years, with the rapid development of fields such as medical imaging and security inspection, there is a large demand for new scintillation materials with high performance. Excellent scintillation materials mainly have the following properties: high luminous ...

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Problems solved by technology

Usually thin film and fibrous materials are the most suitable raw materials for making such devices, so the current form of scintillation materials will have great restrictions on the development of future devices

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