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Glass film containing divalent europium ion doped strontium bromide microcrystals and preparation method thereof

A technology of glass thin film and strontium bromide, which is applied in the field of glass thin film containing divalent europium ion doped strontium bromide microcrystal and its wet chemical preparation, can solve problems such as device development limitations, and achieve the goal of overcoming incomplete uniformity, The effect of high transmittance

Inactive Publication Date: 2016-04-06
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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  • Glass film containing divalent europium ion doped strontium bromide microcrystals and preparation method thereof
  • Glass film containing divalent europium ion doped strontium bromide microcrystals and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a glass thin film containing divalent europium ions doped with strontium bromide microcrystals, comprising the following specific steps:

[0036] (1), prepare the raw materials in molar ratio: aluminum sec-butoxide: trimethyl phosphate: strontium bromide: europium bromide = 144: 20: 15: 3, weigh a total amount of 20 grams of analytically pure each Raw materials are prepared for use;

[0037] (2), the hydrolysis of aluminum sec-butoxide: dissolve the aluminum sec-butoxide weighed in step (1) in dehydrated alcohol, the mol ratio of dehydrated alcohol and aluminum sec-butoxide is 2.5: 1, add acetylacetone rapidly , the volume ratio of aluminum sec-butoxide and acetylacetone is 1:1, and carry out strong magnetic stirring, gradually drop distilled water, the molar ratio of distilled water and aluminum sec-butoxide is 0.8:1, adjust its pH value to 4 with concentrated nitric acid ~5, carry out the hydrolysis reaction at room temperature for 1 hour to pr...

Embodiment 2

[0047] 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: aluminum sec-butoxide: trimethyl phosphate: strontium bromide, europium bromide=148: 30: 10: 1 , each preparation raw material is weighed respectively; In the step (7), the pulling speed of the glass substrate in the gel solution is controlled at 1 mm / s, and the pulling is repeated 5 times, and the interval time of each pulling is 15 minutes; the step ( In 8), the temperature is raised to 100°C at a rate of 50°C per hour, and then the furnace is heated to 340°C at a rate of 50°C per hour; in step (9), the furnace is gradually heated to 470°C, and at this temperature The reaction was treated for 2 hours. The molar composition of the prepared glass film is: 74Al 2 o 3 -15P 2 o 5 -10SrBr 2 -1EuBr 2 .

[0048] For prepared Eu-containing 2+ Ion-doped strontium bromide crystallite glass film was tested for performance, and the XRD ...

Embodiment 3

[0050] 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: aluminum sec-butoxide: trimethyl phosphate: strontium bromide, europium bromide=146: 24: 13: 2 , each preparation raw material is weighed respectively; In the step (7), the pulling speed of the glass substrate in the gel solution is controlled at 0.6 mm / s, and the pulling is repeated 3 times, and the interval time of each pulling is 15 minutes; the step ( 8), the temperature is raised to 100°C at a rate of 40°C per hour, and then the furnace is heated to 340°C at a rate of 40°C per hour; in step (10), the furnace is gradually heated to 460°C, and at this temperature The reaction was treated for 3 hours. The molar composition of the prepared glass film is: 73Al 2 o 3 -12P 2 o 5 -13SrBr 2 -2EuBr 2 .

[0051] For prepared Eu-containing 2+ Ion-doped strontium bromide crystallite glass film was tested for performance, and the XRD ...

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Abstract

The invention discloses a glass film containing divalent europium ion doped strontium bromide microcrystals. The film is characterized by comprising 72-74 mol% of aluminum oxide, 10-15 mol % of phosphorus pentoxide, 10-15 mol% of strontium bromide and 1-3 mol% of europium bromide. The invention has the following advantages: a sol-gel method is a low temperature wet chemical glass preparation technology; glass is obtained by hydrolysis and polymeric chemical reaction process of precursor materials, so the glass can be made into a film material under certain liquid viscosity; low-temperature synthesis conditions effectively prevent decomposition and volatilization of bromide raw materials; and the glass prepared by the sol-gel method, due to volatilization and decomposition of the solvent, can generate certain micropores in the material, and the micropores provide a good environment for generating the nano bromide microcrystals, so as to overcome non-uniformity of crystallization particles and glass devitrification due to the chemical composition of glass melting and incompletely uniform crystallization treatment temperature.

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+ ) doped strontium bromide (SrBr 2 ) Microcrystalline glass film and its 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 densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
CPCC03C4/12C03C10/16C03C2203/26C03C2203/52
Inventor 汤庆阳夏海平江东升冯治刚王成张健何仕楠盛启国
Owner NINGBO UNIV
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