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

A technology of rare earth ions and glass thin films, applied in the field of glass thin films, can solve problems such as device limitations, achieve the effects of promoting generation, high transmittance, and overcoming incomplete uniformity

Inactive Publication Date: 2016-02-03
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually thin film 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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Cs doped with rare earth ions 2 LiLaBr 6 The preparation method of the glass thin film of crystallite comprises following specific steps:

[0044] (1), prepare raw materials in molar ratio: tetraethoxygermanium: butyl titanate: niobium ethoxide: cesium bromide: lithium bromide: lanthanum bromide: cerium bromide = 64: 20: 14: 16: 8: 8 : 1, taking by weighing a total amount of analytically pure raw materials of 30 grams, stand-by;

[0045] (2), the hydrolysis of tetraethoxygermanium: the tetraethoxygermanium weighed in the step (1) is dissolved in dehydrated alcohol, and the mol ratio of dehydrated alcohol and tetraethoxygermanium is 2: 1, fast Add acetylacetone, the volume ratio of acetylacetone to tetraethoxygermanium is 0.7:1, and carry out strong magnetic stirring, gradually drop distilled water, the molar ratio of distilled water to tetraethoxygermanium is 0.6:1, carry out hydrolysis at room temperature React for 1 hour to make solution A;

[0046] (3), hydrolysi...

Embodiment 2

[0056] It is basically the same as Example 1, except that in the step (1), the raw materials are prepared according to the following molar ratio: tetraethoxygermanium: butyl titanate: niobium ethylate: cesium bromide: lithium bromide: lanthanum bromide: bromide Europium=64:16:8:24:12:12:4, each preparation raw material is weighed respectively; In step (8), the pulling speed of the glass substrate in the gel solution is controlled at 1 mm / s, and the pulling speed is repeated 5 times, each pulling interval is 15 minutes; in step (9), be warming up to 100 ℃ with the rate of 50 ℃ per hour, then heat up the furnace to 340 ℃ with the rate of 50 ℃ per hour; ), gradually raise the temperature of the furnace to 640°C, and react at this temperature for 2 hours to obtain Eu-containing 3+ Ion-doped Cs 2 LiLaBr 6 Microcrystalline 64Al 2 o 3 -16TiO 2 -4Nb 2 o 5 -12Cs 2 LiLaBr 6 -4EuBr 3 System glass film.

[0057] For prepared Eu-containing 3+ Ion-doped Cs 2LiLaBr 6 Spectral p...

Embodiment 3

[0059] It is basically the same as Example 1, except that in the step (1), the raw materials are prepared according to the following molar ratio: tetraethoxygermanium: butyl titanate: niobium ethylate: cesium bromide: lithium bromide: lanthanum bromide: bromide Terbium=64:19:10:20:10:10:2, weigh each preparation raw material respectively; in step (8), the pulling speed of the glass substrate in the gel solution is controlled at 0.6 mm / s, and the pulling speed is repeated 3 times, each pulling interval is 15 minutes; in step (9), the rate of 40 ℃ per hour is heated to 100 ℃, and then the furnace is heated to 340 ℃ with the rate of 40 ℃ per hour; in step (10 ), gradually raise the temperature of the furnace to 630°C, and react at this temperature for 3 hours to obtain Tb-containing 3+ Ion-doped Cs 2 LiLaBr 6 Microcrystalline 64GeO 2 -19TiO 2 -5Nb 2 o 5 -10Cs 2 LiLaBr 6 -2TbBr 3 System glass film.

[0060] For prepared Tb-containing 3+ Ion-doped Cs 2 LiLaBr 6 Spectra...

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Abstract

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.

Description

technical field [0001] The invention relates to a glass film containing a rare earth ion-doped microcrystal, in particular to a rare earth ion-doped Cs used as a scintillation material 2 LiLaBr 6 Microcrystalline glass film and its sol-gel wet chemical preparation method. 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 efficiency, high material density, fast fluorescence decay, good radiation resis...

Claims

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Application Information

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IPC IPC(8): C03C10/16
Inventor 汤庆阳夏海平冯治刚王成盛启国何仕楠江东升张健
Owner NINGBO UNIV
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