Perovskite quantum dot scintillation microcrystalline glass and preparation method thereof

A technology of glass-ceramics and quantum dots, which is applied in glass manufacturing equipment, glass dosimeters, and glass molding. It can solve the problems of scintillator luminous intensity decline, nanocrystal damage, and high melting temperature, and achieve good X/γ Effects of ray cut-off capability, high glass density and refractive index, and low melting temperature

Active Publication Date: 2021-08-06
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent Publication No. CN 112047636 A discloses "a preparation method and application of a repairable all-inorganic perovskite quantum dot glass scintillator". Using CsPbBr3:Lu3+ quantum dot glass as a scintillator can achieve good light yield, However, the melting temperature of

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  • Perovskite quantum dot scintillation microcrystalline glass and preparation method thereof
  • Perovskite quantum dot scintillation microcrystalline glass and preparation method thereof
  • Perovskite quantum dot scintillation microcrystalline glass and preparation method thereof

Examples

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Effect test

preparation example Construction

[0049] The preparation method of the above-mentioned perovskite quantum dot scintillation glass-ceramic comprises the following steps:

[0050] S1: Accurately weigh each raw material according to the components of the scintillation glass, fully grind and mix uniformly to obtain a glass batch;

[0051] S2: Melting: in a heat-resistant container with a cover, melt the glass batch obtained in step S1 into a uniform melt, the melting temperature required according to the glass components is 700-1000 ° C, and the melting time is 0.1-0.5h , the melting atmosphere is air;

[0052] S3: Molding and annealing: the molten glass obtained in step S2 is properly cooled and released from the furnace, poured onto a mold to be quenched into block glass, annealed at a constant temperature to eliminate the internal stress of the glass, wherein the annealing temperature is 200-350°C, and the holding time It takes 1-4 hours to cool down to room temperature with the furnace to obtain the precursor...

Embodiment

[0062] The present invention will be described in more detail below in conjunction with the examples. Unless otherwise specified, the raw materials and equipment used in the examples can be purchased through commercial channels and operated under the guidance of the instructions.

[0063] 1. Preparation process

[0064] The preparation method of the above-mentioned luminescent glass comprises the steps of:

[0065] (1) Accurately weigh the raw materials according to the composition of the above-mentioned luminescent glass, and thoroughly grind and mix these raw materials to obtain a glass batch;

[0066] (2) Transfer the glass batch material to an alumina crucible and cover it, then melt, shape, anneal, and cool in an air atmosphere to obtain a precursor glass, and then heat-treat to obtain a perovskite luminescent glass-ceramic, Among them, the melting temperature is 850°C, the heating rate is 10°C / min to the melting temperature, the temperature is lowered to 750°C, and then...

Embodiment 2

[0082] The relative luminous intensity of the scintillation glass prepared in Example 2 under the excitation of X-rays of different powers, as shown in the attached Figure 8 shown. As the X-ray power increases, the radioluminescence intensity increases linearly. It can be used as an X-ray dosimeter to monitor X-ray signals in real time.

[0083] The emission spectra of the glass prepared in Example 2 under initial and continuous X-ray irradiation, as attached Figure 9 shown. Doped CsPbBr in prior art 3 The borate glass of quantum dots will cause crystal damage after X-ray irradiation, and dark spots will appear on the glass surface to affect its radioluminescence. However, the spectrum of the glass prepared above remains unchanged after X-ray irradiation for 10 minutes, proving that Scintillating glass has excellent radiation resistance.

[0084] The relative luminous intensity of the scintillation glass prepared in Example 2 under X-ray excitation after the heating-coo...

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Abstract

The invention discloses perovskite quantum dot scintillation microcrystalline glass and a preparation method thereof. The scintillation microcrystalline glass takes a CsPbBr3 quantum dot as a luminescence center and tellurate glass as a coating matrix, and the glass matrix of the scintillation microcrystalline glass comprises the following raw materials by mole: 50-95% of TeO2, 1-20% ofM2O3, whereinM = B, Al, Ga or In; 0 -20% ofZnO; 1-15% of CsBr; and 1-15% of PbBr2. Ag <+> is doped into the glass matrix to serve as a nucleating agent, and the molar ratio of the doping concentration of Ag < + > is 0.1-1%. The microcrystalline glass has the advantages of simple preparation process, easy realization of large-size preparation, high repeatability, adjustable chemical components, low melting temperature, excellent light stability, higher glass density and refractive index, and excellent high-energy ray cut-off capability, is helpful for realizing high signal-to-noise ratio radiation detection, and can be used for scintillation luminescent devices such as an X-ray dosimeter and the like.

Description

technical field [0001] The invention relates to a high-stability perovskite quantum dot scintillation glass-ceramic and a preparation method thereof, belonging to the technical field of luminescent materials. Background technique [0002] Scintillator is a kind of energy conversion luminescent material with scintillation and luminescent characteristics, which is widely used in high-energy physics experiments, nuclear medical imaging, industrial non-destructive flaw detection, safety inspection, environmental monitoring and exploration, and astronomical observation and other fields. The common requirements of scintillators mainly include high light yield, fast decay, excellent ray cutoff ability, stable physical and chemical properties, radiation resistance and high energy resolution. With the development of high-energy physics, medical fields, and industrial fields, the demand for scintillation materials is also increasing, so the research on scintillation materials also nee...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03C4/12C03B19/02C03B32/02G01T1/02G01T1/06G01T1/10
CPCC03C10/16C03C4/12C03B19/02C03B32/02G01T1/023G01T1/06G01T1/10
Inventor 任晶牛璐玥隋泽萱宋玉收张建中
Owner HARBIN ENG UNIV
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