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Transparent ceramic scintillator material by using lutecium oxide-gadolinium oxide solid solution as substrate and preparation method thereof

A technology of scintillator materials and transparent ceramics, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of limited application, difficult single crystal, high melting point, etc., and achieve the effect of high linear transmittance and good mechanical properties

Inactive Publication Date: 2008-09-17
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Gd 2 o 3 With a very high melting point (2673K), it is difficult to prepare a single crystal with practical value by the melt method
Also, since Gd 2 o 3 Cubic to monoclinic phase transition occurs at ~1200 °C, making it difficult to prepare transparent ceramics at high temperatures by pressureless sintering techniques
Limits its application in the field of scintillation detection
So far, there are no patents or literature reports on the preparation of transparent ceramics by pressureless sintering technology.

Method used

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  • Transparent ceramic scintillator material by using lutecium oxide-gadolinium oxide solid solution as substrate and preparation method thereof
  • Transparent ceramic scintillator material by using lutecium oxide-gadolinium oxide solid solution as substrate and preparation method thereof
  • Transparent ceramic scintillator material by using lutecium oxide-gadolinium oxide solid solution as substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. High sintering activity Gd 2-2x-2y Lu 2x RE 2y o 3 Nano powder synthesis:

[0028] (a) Analytical pure Lu 2 o 3 、Gd 2 o 3 and Eu 2 o 3 Coarse powder was dissolved in analytically pure concentrated nitric acid solution, and filtered to prepare 0.5mol L -1 nitrate solution, measure 350ml of gadolinium nitrate, 125ml of lutetium nitrate, 25ml of europium nitrate, the preparation concentration is 0.5mol L -1 500ml of nitrate mother liquor;

[0029] (b) Prepare 0.5mol·L -1 NH 4 HCO 3 The solution acts as a precipitating agent;

[0030] (c) Put 0.5mol·L -1 NH 4 HCO 3 The solution is dripped to 500ml with a concentration of 0.5mol L -1 In rare earth nitrate mother liquor, the dropping rate is 3ml·min -1 . During the reaction period, perform magnetic stirring while titrating, control the end point pH=5, and continue stirring for 4 hours after the titration ends;

[0031] (d) The oxide powder is obtained after the precursor powder is washed, dried and cal...

Embodiment 2

[0040] 1. High sintering activity Gd 2-2x-2y Lu 2x RE 2y o 3 Nano powder synthesis:

[0041] (a) Analytical pure Lu 2 o 3 、Gd 2 o 3 and Tb 2 o 3 Coarse powder was dissolved in analytically pure concentrated nitric acid solution, and filtered to prepare 0.5mol L -1 nitrate solution, 300ml of gadolinium nitrate, 175ml of lutetium nitrate, 25ml of terbium nitrate, the preparation concentration is 0.5mol L -1 500ml of nitrate mother liquor;

[0042] (b) Prepare 1.0mol·L -1 NH 4 HCO 3 The solution acts as a precipitating agent;

[0043] (c) Put 1.0mol·L -1 NH 4 HCO 3 The solution is dripped to 500ml with a concentration of 0.5mol L -1 In rare earth nitrate mother liquor, the dropping rate is 3ml·min -1 . During the reaction period, perform magnetic stirring while titrating, control the end point pH=5.7, and continue stirring for 4 hours after the titration ends;

[0044] (d) The oxide powder is obtained after the precursor powder is washed, dried and calcined; ...

Embodiment 3

[0053] 1. High sintering activity Gd 2-2x-2y Lu 2x RE 2y o 3 Nano powder synthesis:

[0054] (a) Analytical pure Lu 2 o 3 、Gd 2 o 3 and Yb 2 o 3 Coarse powder was dissolved in analytically pure concentrated nitric acid solution, and filtered to prepare 0.5mol L -1 nitrate solution, measure gadolinium nitrate 250ml, lutetium nitrate 225ml, ytterbium nitrate 25ml, the preparation concentration is 0.5mol L -1 500ml of nitrate mother liquor;

[0055] (b) Prepare 1.5mol·L -1 NH 4 HCO 3 The solution acts as a precipitating agent;

[0056] (c) Put 1.5mol·L -1 NH 4 HCO 3 The solution is dripped to 500ml with a concentration of 0.5mol L -1 In rare earth nitrate mother liquor, the dropping rate is 3ml·min -1 . During the reaction period, perform magnetic stirring while titrating, control the end point pH=6.4, and continue stirring for 4 hours after the titration ends;

[0057] (d) The oxide powder is obtained after the precursor powder is washed, dried and calcined;...

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Abstract

The invention relates to a transparent ceramic scintillator material containing lutecium oxide-gadolinium oxide solid solution as matrix and a production method thereof. The method comprises the steps of powder synthesis, molding, bisque firing, sintering and annealing treatment. The transparent ceramic scintillator material containing lutecium oxide-gadolinium oxide solid solution as matrix has a visible light linear transmittance more than 60% and good mechanical property, and can be used as matrix material for scintillators. The invention can improve the blocking ability of the gadolinium oxide matrix against ionization radiation, improve the scintillation property of Gd2O3 and reduce the production cost of Lu2O3; and has good application prospect in the field of scintillation radiation detection.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a transparent ceramic scintillator material based on lutetium oxide-gadolinium oxide solid solution and a preparation method thereof. Background technique [0002] Scintillation material is a material that can absorb high-energy particles or rays and emit visible photons. It is widely used in space physics, geological exploration and other fields. Although different applications have different requirements for scintillators, scintillators are used to detect ionizing radiation in most applications, so scintillators are required to have a high blocking ability for ionizing radiation, that is, scintillators are required to have high dense and contain elements with large atomic numbers. In many applications, a large amount of scintillator is used. Therefore, it is also required that the scintillator has a low price and can be produced and processed with high quality ...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/622C09K11/77
Inventor 李晓东孙旭东刘妍修稚萌李继光霍地
Owner NORTHEASTERN UNIV
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