Preparation method for glass film containing rare-earth-ion-doped gadolinium chloride microcrystalline

A rare earth ion, glass thin film technology, applied in the field of glass thin film preparation, can solve problems such as device development limitations, and achieve the effects of preventing decomposition and volatilization, superior scintillation performance, and promoting generation

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 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

Method used

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  • Preparation method for glass film containing rare-earth-ion-doped gadolinium chloride microcrystalline
  • Preparation method for glass film containing rare-earth-ion-doped gadolinium chloride microcrystalline
  • Preparation method for glass film containing rare-earth-ion-doped gadolinium chloride microcrystalline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of the glass thin film containing rare earth ion-doped gadolinium chloride microcrystal, comprises the following steps:

[0035](1), the preparation raw materials are composed by mole percent: ethyl orthosilicate: 74.5mol%, butyl titanate: 15mol%, gadolinium chloride: 10mol%, europium chloride: 0.5mol%, and weigh the total amount Be each preparation raw material of 20 grams of analytical purity, stand-by;

[0036] (2), hydrolysis of butyl titanate: dissolve the butyl titanate weighed in step (1) in dehydrated alcohol, the molar ratio of dehydrated alcohol and butyl titanate is 3: 1, add glacial acetic acid quickly , the volume ratio of butyl titanate to glacial acetic acid is 1:1, and strong magnetic stirring is carried out, and distilled water is gradually added dropwise. into solution A;

[0037] (3), the hydrolysis of ethyl orthosilicate: the ethyl orthosilicate weighed in step (1) is dissolved in dehydrated alcohol, and the mol ratio of dehy...

Embodiment 2

[0046] It is basically the same as Example 1, except that in step (1), the raw materials are prepared in molar percentages: ethyl orthosilicate: 70 mol%, butyl titanate: 10 mol%, gadolinium chloride: 15 mol%, europium chloride : 5mol%, take the total amount to be 20 grams of each analytical pure raw material, stand-by; the pulling speed of the glass substrate in the gel solution is controlled at 1 mm / s in the step (7), repeat pulling 5 times, every The interval between pulling and pulling is 15 minutes, and the coated film is dried at room temperature for 4 hours; in step (8), the temperature is raised to 100°C at a rate of 50°C per hour, and the temperature is kept for 1 hour to remove residual water and ethanol , then heat up the stove to 340°C at a rate of 50°C per hour and keep it warm for 20 minutes to remove residual organic matter in the film; in step (9), gradually heat up the stove to 780°C at a rate of 60°C per hour, and Reaction treatment at this temperature for 2 h...

Embodiment 3

[0049] It is basically the same as Example 1, except that in step (1), the raw materials are prepared in molar percentages: ethyl orthosilicate: 72 mol%, butyl titanate: 13 mol%, gadolinium chloride: 13 mol%, europium chloride : 2mol%, taking by weighing total amount is each preparation raw material of analytical purity of 20 grams, stand-by; In step (7), the lifting speed of glass substrate in gel solution is controlled at 0.6 mm / s, repeats pulling 3 time, each pulling interval is 15 minutes, and the coated film is dried at room temperature for 4 hours; in step (8), the temperature is raised to 100°C at a rate of 40°C per hour, and the temperature is kept for 1 hour to remove residual water and ethanol, then heat up the furnace to 340°C at a rate of 40°C per hour, and keep warm for 20 minutes to remove residual organic matter in the film; in step (9), gradually heat up the furnace to 770°C at a rate of 55°C per hour , and reacted at this temperature for 3 hours, and finally o...

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Abstract

The invention discloses a preparation method for a glass film containing rare-earth-ion-doped gadolinium chloride microcrystalline. The technical scheme is characterized in that the preparation raw materials comprise, in percent by mole, 70-74.5 mol% of ethyl orthosilicate, 10-15 mol% of butyl titanate, 10-15 mol% of gadolinium chloride, and 0.5-5 mol% of a rare-earth chloride, wherein the rare-earth chloride is one of europium chloride and terbium chloride. 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 chloride 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 chloride 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 present invention relates to a kind of rare earth ion-doped microcrystalline glass thin-film preparation technique, relate in particular to a kind of europium-containing ion (Eu 3+ ) and terbium ions (Tb 3+ ) ion-doped gadolinium chloride (GdCl 3 ) 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 efficiency, high ...

Claims

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Application Information

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IPC IPC(8): C03C10/16
Inventor 王成夏海平江东升冯治刚张健何仕楠盛启国汤庆阳
Owner NINGBO UNIV
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