Glass film containing rare-earth-ion-doped Cs2LiLaBr6 microcrystalline and preparation method thereof

微晶的玻璃薄膜及其制备方法

Abstract

本发明公开了含稀土离子掺杂Cs2LiLaBr6微晶的玻璃薄膜,特点是其摩尔百分组成为:二氧化锗:64mol%、二氧化钛:16-20mol%、五氧化二铌:4-7mol%、Cs2LiLaBr6:8-12mol%、稀土溴化物:1-4mol%,其中稀土溴化物为溴化铈、溴化铕或溴化铽中的一种;优点是溶胶-凝胶是一种低温湿化学法玻璃制备技术,通过先驱体原料的水解与聚合化学反应过程来获得玻璃,因此在一定的液体粘度下可制备成薄膜材料,且低温的合成条件可有效地防止溴化物原料的分解与挥发;溶胶-凝胶法制备的玻璃由于溶剂的挥发与分解,在材料中会生成一定的微孔,这些微孔为纳米溴化物微晶的生成提供好的环境,从而可一定程度克服由于熔制玻璃的化学组分和析晶处理温度的不完全均匀性,导致析晶颗粒的不均匀与玻璃的失透。
A disclosed glass film containing rare-earth-ion-doped Cs2LiLaBr6 microcrystalline is characterized in that the glass film comprises the following compositions in percent by mole: 64 mol% of germanium dioxide, 16-20 mol% of titanium dioxide, 4-7 mol% of niobium pentoxide, 8-12 mol% of Cs2LiLaBr6, and 1-4 mol% of a rare-earth bromide, wherein the rare-earth bromide is one of cerium bromide, europium bromide and terbium bromide. 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 bromide 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 bromide 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.

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