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Rare-earth-doped lutetium borate radiation detection material, and preparation and application thereof

A radiation detection and rare earth doping technology, which is applied in the field of rare earth doped lutetium borate radiation detection materials, can solve the problems of high cost, long cycle time, and low luminous efficiency of single crystals, and achieve low cost, easy control of conditions, and easy preparation process operation easy effect

Inactive Publication Date: 2011-11-09
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost and long period of preparation of single crystals, and these materials themselves have one or another deficiency, such as Nal:Tl, Csl:Tl, Bi 4 Ge 3 o 12 The afterglow is too strong, Nal:Tl, LaCl 3 : Ce deliquescent, PbWO 4 Low luminous efficiency, etc.

Method used

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  • Rare-earth-doped lutetium borate radiation detection material, and preparation and application thereof
  • Rare-earth-doped lutetium borate radiation detection material, and preparation and application thereof
  • Rare-earth-doped lutetium borate radiation detection material, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: by (Lu 0.5 Gd 0.5 ) 0.995 Ce 0.005 BO 3 Stoichiometric ratio for proportioning. First weigh high-purity Lu 2 o 3 6.605g, Gd 2 o 3 6.017g, H 3 BO 3 4.126g, CeO 2 0.058g is fully mixed in an agate mortar, the powder is pre-pressed at 10Mpa in a Φ20mm mold, and the holding time is 30s. , Calcined for 10 hours. After pre-burning, program temperature control cooling (cooling rate is 2°C / min), take out the sample and re-grind, mix well and evenly, pre-press and form in a Φ20mm mold with 10Mpa, hold the pressure for 30s, and then pass the sample through 200Mpa isostatic Pressure treatment, holding time 120s. Then put the flakes into a crucible, and calcined in air at a high temperature of 1500°C for 10 hours. After program-controlled cooling (the cooling rate is 5°C / min), the sample is taken out and ground sufficiently to obtain the required radiation detection powder material. figure 1 Provide the radiation detection powder material provided by...

Embodiment 2

[0034] Embodiment 2: by (Lu 0.9 Gd 0.1 ) 0.997 Ce 0.003 BO 3 Stoichiometric ratio for proportioning. First weigh high-purity Lu 2 o 3 7.711g, Gd 2 o 3 0.7829,H 3 BO 3 2.6669, CeO 2 0.0229, fully mixed in an agate mortar, the powder is pre-pressed at 10Mpa in a Φ20mm mold, and the holding time is 30s. , calcined for 10 hours; after pre-calcination, the program temperature controlled cooling (cooling rate is 5°C / min), took out the sample and re-grinded, mixed fully and evenly, and pre-pressed with 10Mpa in a Φ20mm mold for 30s, and then The sample was subjected to 200Mpa isostatic pressure treatment, and the holding time was 120s. Then put the flakes into a crucible, and perform high-temperature calcination under air conditions at a temperature of 1500° C. and a holding time of 10 hours. After programmed temperature-controlled cooling (the cooling rate is 2°C / min), take out the sample and grind it sufficiently to obtain the desired radiation detection powder mate...

Embodiment 3

[0035] Embodiment 3: by (Lu 0.9 Y 0.1 ) 0.997 Ce 0.003 BO 3 Stoichiometric ratio for proportioning. First weigh Lu 2 o 3 7.9309,Y 2 o 3 0.5089,H 3 BO 3 2.7499, CeO 2 0.0239, fully mixed in an agate mortar, the powder is pre-pressed at 10Mpa in a Φ20mm mold, and the holding time is 30s. , calcined for 10 hours; after pre-calcination, the program temperature controlled cooling (cooling rate is 5°C / min), took out the sample and re-grinded, mixed fully and evenly, and pre-pressed with 10Mpa in a Φ20mm mold for 30s, and then The sample was subjected to 200Mpa isostatic pressure treatment, and the holding time was 120s. Then put the flakes into a crucible, and calcined in air at a high temperature of 1500°C for 10 hours. After programmed temperature-controlled cooling (the cooling rate is 5°C / min), take out the sample and grind it sufficiently to obtain the desired radiation detection powder material, and the light output of the powder material can reach a level com...

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Abstract

The invention belongs to the field of luminescent materials and particularly relates to a rare-earth-doped lutetium borate radiation detection material as well as preparation and application thereof. The detection material provided by the invention has a chemical formula of (Lu1-x-yMxNy)BO3, wherein M is selected from one of the following doping ions: Gd<3+>, Y<3+> and La<3+>; N is selected from one of the following activator ions: Ce<3+>, Pr<3+> and Yb<3+>; and 0.005<=x<=0.5 and 0.001<=y<=0.1. The rare-earth-doped lutetium borate radiation detection material provided by the invention can be used in the technical fields of nuclear medicine imaging [positron emission tomography (PET)], X-ray imaging [such as X-ray computed tomography (CT)], security detection and other the like in a powder, block or film form.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to a rare earth-doped lutetium borate radiation detection material and its preparation and application. Background technique [0002] Radiation detection materials are a kind of special light functional materials that can absorb X-rays, gamma rays or other high-energy rays and convert them into visible light. The radiation detectors made by coupling with photomultiplier tubes or silicon photodiodes can be applied to High-energy physics, nuclear physics, nuclear medical imaging (such as positron emission tomography PET, X-ray computerized tomography CT), safety inspection (such as container rapid inspection system) and industrial inspection (such as oil well nuclear detection, rockets, missiles, etc. Non-destructive detection of important components) and other fields. With the transfer of nuclear technology from military use to civilian use, the demand for radiation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 丁栋舟吴云涛任国浩潘尚可
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI