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Orthophosphate scintillator material with beta-K2SO4 (potassium sulfate) structure and preparation method and application thereof

A scintillator material, -K2SO4 technology, applied in analytical materials, luminescent materials, fluorescence/phosphorescence, etc., can solve the problems of low luminous efficiency, short afterglow, easy deliquescence, etc., and achieve short luminous life, stable structure and performance, cost low effect

Inactive Publication Date: 2017-09-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An ideal scintillation material should have the characteristics of high light output, high density, fast decay, short afterglow, and low cost. Currently, the scintillation materials used are mainly NaI:Tl, PbWO, etc. 4 、 Bi 4 Ge 3 o 12 etc., but there are disadvantages such as easy deliquescence, long afterglow, low luminous efficiency and long afterglow

Method used

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  • Orthophosphate scintillator material with beta-K2SO4 (potassium sulfate) structure and preparation method and application thereof
  • Orthophosphate scintillator material with beta-K2SO4 (potassium sulfate) structure and preparation method and application thereof
  • Orthophosphate scintillator material with beta-K2SO4 (potassium sulfate) structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh potassium dihydrogen phosphate (KH 2 PO 4 ) 0.6905 g, strontium carbonate (SrCO 3 ) 0.7367 g, potassium carbonate (K 2 CO 3 ) 0.003g and ceria (CeO 2 ) 0.0009 g in an agate mortar and grind for 20 minutes to mix evenly, then put it into a corundum crucible, put the corundum crucible into a large corundum crucible with a carbon block, and roast the reaction at a high temperature in a CO reducing atmosphere. The specific heating procedure is as follows : Take 5 hours to raise the temperature from room temperature to 1300°C, and keep it warm for 3 hours; wait for the sample to cool naturally to room temperature to obtain the final product, and its chemical composition expression is K 1.001 Sr 0.998 Ce 0.001 PO 4 .

Embodiment 2

[0045] Weigh potassium dihydrogen phosphate (KH 2 PO 4 ) 0.6905 g, barium carbonate (BaCO 3 ) 0.9847 g, potassium carbonate (K 2 CO 3 ) 0.003g and ceria (CeO 2 ) 0.0009 g in an agate mortar and grind for 20 minutes to mix evenly, then put it into a corundum crucible, put the corundum crucible into a large corundum crucible with a carbon block, and roast the reaction at a high temperature in a CO reducing atmosphere. The specific heating procedure is as follows : Take 5 hours to raise the temperature from room temperature to 1300°C, and keep it warm for 3 hours; wait for the sample to cool naturally to room temperature to obtain the final product, and its chemical composition expression is K 1.001 Ba 0.998 Ce 0.001 PO 4 .

Embodiment 3

[0047] Weigh diammonium hydrogen phosphate ((NH 3 ) 2 HPO 4 ) 0.5582 g, barium carbonate (BaCO 3 ) 0.7878 g, rubidium carbonate (Rb 2 CO 3 ) 0.4904 g and ceria (CeO 2 ) 0.007 g in an agate mortar and ground for 20 min to mix evenly, then put it into a corundum crucible, put the corundum crucible into a large corundum crucible with carbon blocks, and roast the reaction at high temperature in a CO reducing atmosphere. The specific heating procedure is as follows : It takes 4 hours to raise the temperature from room temperature to 1000°C, and keep it warm for 6 hours; after the sample is naturally cooled to room temperature, the final product is obtained, and its chemical composition expression is Rb 1.001 Ba 0.998 Ce 0.001 PO 4 .

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Abstract

The invention discloses an orthophosphate scintillator material with a beta-K2SO4 (potassium sulfate) structure and a preparation method and application thereof. A chemical formula is A1+xB1-2xLnxPO4, wherein A is K<+> and Rb<+>; B is Sr<2+> and Ba<2+>; Ln is Ce<3+>; x is the content of substituted matrix B doped with the ion Ce<3+>, and x is smaller than or equal to 0.09 and is greater than or equal to 0. The orthophosphate scintillator material has the advantages that the chemical stability is good, and the easiness in moisture degrading is avoided; the ultraviolet light of 325-400nm is transmitted under the exciting action of ultraviolet light, the light emitting service life is short and is 23+ / -3ns, and the heat stability is excellent (T50% less than 500K); by regulating the KSrPO4 into the KBaPO4, the Ba (barium) element with large atom sequence can improve the absorbing efficiency of matrix on the high-energy X-ray, so that the light output intensity of the material under the radiation function of the X-ray is obviously enhanced; the fluorescent service life is short, and the heat stability is good; the scintillator material is expected to use as the novel scintillator material to be applied into high-energy physics and nuclear medical imaging techniques; especially, the scintillator material can be applied to radioactive detection devices under the high-temperature environments in oilfield well exploration (industrial exploration) and the like.

Description

technical field [0001] The invention belongs to the field of scintillator luminescent materials. More specifically, it relates to a class with β-K 2 SO 4 The orthophosphate matrix of the structure is composed of high atomic number elements (Sr and Ba, etc.) and doped with rare earth ions (Ce 3+ ) of scintillator materials and their potential applications in industrial exploration, high energy physics and nuclear medical imaging. Background technique [0002] Scintillator materials have been widely used in industrial exploration (oil well nuclear detection and non-destructive testing of important components such as rockets and aircraft), high-energy physics, nuclear medical imaging (X-ray computer tomography) and security inspection (container rapid inspection system) and other fields . Scintillators can absorb high-energy photon / particle energy through electrons in solids to become excited state electrons, and the unstable excited state electrons release energy and retur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71G01N21/64
CPCG01N21/6428C09K11/71G01N2021/6432
Inventor 梁宏斌周容富林利添周炜杰
Owner SUN YAT SEN UNIV
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