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

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...

Examples

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 ...

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...

Examples

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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