Method of preparing barium yttrium borate and barium yttrium borate crystal and use thereof

A barium borate and crystal technology, applied in the field of scintillation crystals and their growth, achieves the effects of sensitive response, simple equipment and mild experimental conditions

Inactive Publication Date: 2007-10-17
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This decay time is relatively short, but the above research only involves the characteristics of powdered barium yttrium borate, and no one has been involved in the research on the characteristics of single crystal barium yttrium borate

Method used

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  • Method of preparing barium yttrium borate and barium yttrium borate crystal and use thereof
  • Method of preparing barium yttrium borate and barium yttrium borate crystal and use thereof
  • Method of preparing barium yttrium borate and barium yttrium borate crystal and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First prepare barium yttrium borate polycrystalline raw material:

[0022] Analytical pure yttrium oxide (Y 2 o 3 ), barium carbonate (BaCO 3 ), boric acid (H 3 BO 3 ) in a molar ratio of 1:3:9.0-9.1 is ground in an agate mortar and mixed evenly, then put into a platinum crucible, put the platinum crucible into a muffle furnace, heat to 920°C and keep at this temperature for 72 Hours, grind 3 times during the heating process to make the reactants fully react in solid phase, then turn off the power, and cool the sample to room temperature with the furnace to obtain YBa 3 B 9 o 18 Polycrystalline. The X-ray diffraction spectrum of the obtained sample is shown in Figure 1, indicating that the obtained powder is barium yttrium borate. The purity of the above-mentioned analytically pure yttrium oxide, barium carbonate, and boric acid is not less than 99.9%;

[0023] Utilize above-mentioned raw material to grow and obtain barium yttrium borate single crystal:

[002...

Embodiment 2

[0026] First prepare barium yttrium borate polycrystalline raw material:

[0027] Analytical pure yttrium oxide (Y 2 o 3 ), barium carbonate (BaCO 3 ), boric acid (H 3 BO 3 ) in a molar ratio of 1:3:9.0-9.1 is ground in an agate mortar and mixed evenly, then put into a platinum crucible, put the platinum crucible into a muffle furnace, heat to 930°C and keep at this temperature for 24 Hours, grind 3 times during the heating process to make the reactants fully react in solid phase, then turn off the power, and cool the sample to room temperature with the furnace to obtain YBa 3 B 9 o 18 Polycrystalline. The X-ray diffraction spectrum of the obtained sample is shown in Figure 1, indicating that the obtained powder is barium yttrium borate. The purity of the above-mentioned analytically pure yttrium oxide, barium carbonate, and boric acid is not less than 99.9%;

[0028] Utilize above-mentioned raw material to grow and obtain barium yttrium borate single crystal:

[002...

Embodiment 3

[0031] First prepare barium yttrium borate polycrystalline raw material:

[0032] Analytical pure yttrium oxide (Y 2 o 3 ), barium carbonate (BaCO3 ), boric acid (H 3 BO 3 ) in a molar ratio of 1:3:9.0-9.1, ground in an agate mortar and mixed evenly, then put into a platinum crucible, put the platinum crucible into a muffle furnace, heat to 940°C and keep the temperature for 12 hours , grind 5 times during the heating process to make the reactants fully react in solid phase, then turn off the power, let the sample cool down to room temperature with the furnace to get YBa 3 B 9 o 18 Polycrystalline. The X-ray diffraction spectrum of the obtained sample is shown in Figure 1, indicating that the obtained powder is barium yttrium borate. The purity of the above-mentioned analytically pure yttrium oxide, barium carbonate, and boric acid is not less than 99.9%;

[0033] Utilize above-mentioned raw material to grow and obtain barium yttrium borate single crystal:

[0034] Th...

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Abstract

The present invention discloses a preparation method and uses of a barium borate Yt crystal. Compared to the technology in existence, the monocrystal barium borate Yt in accordance with the present invention is characterized by its high luminescence intensity and light-emitting efficiency, sensitive responses and the like. Furthermore, in accordance with the present invention, said process can be used for getting barium borate Yt single crystal at conditions of air atmosphere and about 1019 DEG C, with mild experiment conditions and short reaction time; and the crystal obtained through the method possesses is characterized by its excellent quality, low material cost, simple equipment, being easy to extend. Said barium borate Yt crystal exhibits some characteristics such as high efficiency and quick-speed, when used for X-ray exploration.

Description

technical field [0001] The present invention relates to a scintillation crystal and its growth method and application, in particular to a barium yttrium borate crystal grown by Czochralski method and its application in scintillation (such as X-ray detection). Background technique [0002] Some crystals emit ultraviolet light or visible light under the irradiation of high-energy rays (such as X-rays, γ-rays) or high-energy particles. This phenomenon is called scintillation effect, and crystals with scintillation effect are called scintillation crystals. Excellent scintillation crystals should have three important performance indicators, namely higher light yield, short decay time and high density. The representative scintillation crystals that have been commercialized are Bi 4 Ge 3 o 12 (BGO), Gd 2 SiO 5 (GSO), PbWO 4 (PWO) etc. BGO has a higher light yield, but the decay time is longer (~300ns); PWO has a short decay time but the light yield is not very high. Barium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B15/00
Inventor 陈小龙何明孙玉平王皖燕
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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