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Glass-ceramic containing a bismuth germanate crystal phase, and preparation method thereof

A technology of glass-ceramics and bismuth germanate, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of short decay time, short irradiation length, high irradiation hardness, etc., and achieve excellent performance, simple preparation process and low production cost low effect

Inactive Publication Date: 2018-02-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An ideal scintillator material should have the following characteristics: (1) high light yield, the higher the light yield, the higher the energy resolution; (2) short decay time: (3) high density; (4) short radiation (5) The emission spectrum matches the spectrum of the detector; (6) High irradiation hardness; (7) The price is low, but ideal materials that fully meet the above requirements do not exist, and the currently optimized inorganic scintillation The bulk material is bismuth germanate (Bi 4 Ge 3 o 12 ) single crystal, and bismuth germanate glass-ceramics has better physical properties than bismuth germanate single crystal, but there is no relevant technical report on glass-ceramics containing bismuth germanate crystal phase in the prior art

Method used

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  • Glass-ceramic containing a bismuth germanate crystal phase, and preparation method thereof
  • Glass-ceramic containing a bismuth germanate crystal phase, and preparation method thereof
  • Glass-ceramic containing a bismuth germanate crystal phase, and preparation method thereof

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Effect test

Embodiment 1

[0024] A glass-ceramic containing bismuth germanate crystal phase, the crystallite phase of the glass-ceramic is bismuth germanate, specifically prepared by the following method:

[0025] (1) Using bismuth trioxide, germanium dioxide and bismuth hydroxide as raw materials, wherein the molar ratio of bismuth trioxide, germanium dioxide and bismuth hydroxide is 10:90:3, and the raw materials are mixed and tested Grind in a bowl for 30 minutes;

[0026] (2) Put the ground raw material into a corundum crucible (covered) and melt it into a glass solution at high temperature. When heating the raw material, the heating rate is 80°C / h, and the temperature is kept at 1050°C for 30min.

[0027] (3) Put the glass solution into the muffle furnace for annealing at a cooling rate of 60°C / h, and keep the temperature at 550°C for 4 hours. When the temperature drops to 50°C, turn off the power of the muffle furnace, and then let the glass drop to room temperature with the furnace , that is, a...

Embodiment 2

[0030] A glass-ceramic containing bismuth germanate crystal phase, the crystallite phase of the glass-ceramic is bismuth germanate, specifically prepared by the following method:

[0031] (1) Using bismuth trioxide, germanium dioxide and bismuth hydroxide as raw materials, wherein the molar ratio of bismuth trioxide, germanium dioxide and bismuth hydroxide is 20:80:3, and the raw materials are mixed and tested Grinding in a bowl for 45 minutes;

[0032] (2) Put the ground raw material into a corundum crucible (covered) and melt it into a glass solution at high temperature. When heating the raw material, the heating rate is 100°C / h, and the temperature is kept at 1100°C for 80min.

[0033] (3) Put the glass solution into the muffle furnace for annealing, the cooling rate is 80°C / h, and keep the temperature at 550°C for 8 hours. When the temperature drops to 50°C, turn off the power of the muffle furnace, and then let the glass drop to room temperature with the furnace , that i...

Embodiment 3

[0035] A glass-ceramic containing bismuth germanate crystal phase, the crystallite phase of the glass-ceramic is bismuth germanate, specifically prepared by the following method:

[0036] (1) Using bismuth trioxide, germanium dioxide and bismuth hydroxide as raw materials, wherein the molar ratio of bismuth trioxide, germanium dioxide and bismuth hydroxide is 40:90:10, and the raw materials are mixed and tested Grinding in a bowl for 60 minutes;

[0037] (2) Put the ground raw material into a corundum crucible (covered) and melt it into a glass solution at high temperature. When heating the raw material, the heating rate is 150°C / h, and the temperature is kept at 1200°C for 120min.

[0038] (3) Put the glass solution into the muffle furnace for annealing, the cooling rate is 120°C / h, and keep the temperature at 550°C for 10h, when the temperature drops to 50°C, turn off the power of the muffle furnace, and then let the glass drop to room temperature with the furnace , that is...

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Abstract

The present invention relates to a glass-ceramic containing a bismuth germanate crystal phase, and a preparation method thereof, wherein the microcrystalline phase of the glass-ceramic is bismuth germanate, and the preparation raw materials of the glass-ceramic comprise bismuth trioxide, germanium dioxide and bismuth hydroxide according to a molar ratio of 10-40:60-90:3-10. The specific preparation method comprises: (1) preparing raw materials according to a certain ratio, and grinding the raw materials; (2) mixing the grinded raw materials, and carrying out high temperature melting to preparea glass; and (3) annealing the prepared glass, and cooling to obtain the glass-ceramic containing the bismuth germanate crystal phase. According to the present invention, the scintillating glass-ceramic material has the light-emitting property similar to the crystal material with the full width at half maximum of about 200 nm, has good processability so as to be widely used in ray detection, further has advantages of excellent glass material performance, stable size, simple preparation process, designable performance and low production cost, and can be welded to metals.

Description

technical field [0001] The invention relates to a scintillating luminescent material, in particular to a glass-ceramic containing bismuth germanate crystal phase and a preparation method thereof. Background technique [0002] Scintillator materials refer to materials that can absorb high-energy particles or rays and emit visible photons. Inorganic scintillation materials are widely used in the fields of ionizing radiation detection, high-energy physical calorimetry and medical imaging. An ideal scintillator material should have the following characteristics: (1) high light yield, the higher the light yield, the higher the energy resolution; (2) short decay time: (3) high density; (4) short radiation (5) The emission spectrum matches the spectrum of the detector; (6) High irradiation hardness; (7) The price is low, but ideal materials that fully meet the above requirements do not exist, and the currently optimized inorganic scintillation The bulk material is bismuth germana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C09K11/74
Inventor 李纳刘军芳徐军郭超赵衡煜刘斌
Owner TONGJI UNIV
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