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Preparation method of terbium-doped lithium magnesium phosphate photoexcitation luminous dosimeter

A light-stimulated luminescence and magnesium phosphate technology, which is applied to luminescent dosimeters, dosimeters, and luminescent materials, can solve difficult problems and achieve the effects of increased yield, reduced preparation difficulty and cost, and omission of grinding process

Inactive Publication Date: 2017-08-29
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because the materials prepared by the previous high-temperature solid-state reaction have irregular shapes, and the secondary cutting process is difficult, the series of materials prepared according to the previous methods are mostly in the state of powder or irregular small particles

Method used

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  • Preparation method of terbium-doped lithium magnesium phosphate photoexcitation luminous dosimeter
  • Preparation method of terbium-doped lithium magnesium phosphate photoexcitation luminous dosimeter
  • Preparation method of terbium-doped lithium magnesium phosphate photoexcitation luminous dosimeter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. In the agate mortar, add the raw material LiOH·H 2 O 15.42g (0.37mol), Mg (NO 3 ) 2 ·6H 2 O 84.61g (0.33mol), NH 4 h 2 PO 4 36.42g (0.32mol), Tb 4 o 70.598g (0.25mol%) and H 3 BO 3 5.0g (0.08mol), put into an agate mortar and grind for 1h to obtain a gray paste mixture;

[0025] b. Put the mixed material obtained in step a into a corundum crucible, put it into a high-temperature sintering furnace, raise the temperature to a pre-burning temperature of 750°C at a heating rate of 2°C / min, keep it warm for 15 hours, and then lower it to room temperature with the furnace to obtain a white color LiMgPO 4 : Tb, B pre-fired material;

[0026] c. After the reaction, the white LiMgPO 4 :Tb,B The pre-fired material was taken out from the crucible, and then ground with a glass mortar to eliminate agglomeration to obtain white LiMgPO 4 : Tb, B powder;

[0027] d. Weigh 0.10 g of the powder obtained in step c and pour it into a one-way stainless steel stamping die ...

Embodiment 2

[0031] a. In the agate mortar, add the raw material LiOH·H 2 O 15.42g (0.37mol), Mg (NO 3 ) 2 ·6H 2 O 84.61g (0.33mol), NH 4 h 2 PO 4 36.42g (0.32mol), Tb 4 o 7 0.598g (0.25mol%) and H 3 BO 3 5.0g (0.08mol), put into an agate mortar and grind for 1h to obtain a gray paste mixture;

[0032] b. Put the mixed material obtained in step a into a corundum crucible, put it into a high-temperature sintering furnace, raise the temperature to a pre-burning temperature of 750°C at a heating rate of 2°C / min, keep it warm for 15 hours, and then lower it to room temperature with the furnace to obtain a white color LiMgPO 4 : Tb, B pre-fired material;

[0033] c. After the reaction, the white LiMgPO 4 :Tb,B The pre-fired material was taken out from the crucible, and then ground with a glass mortar to eliminate agglomeration to obtain LiMgPO 4 : Tb, B powder;

[0034] d. Weigh 0.10 g of the powder obtained in step c and pour it into a one-way stainless steel stamping die with...

Embodiment 3

[0038] a. In the agate mortar, add the raw material LiOH·H 2 O 15.42g (0.37mol), Mg (NO 3 ) 2 ·6H 2 O 84.61g (0.33mol), NH 4 h 2 PO 4 36.42g (0.32mol), Tb 4 o 7 0.598g (0.25mol%) and H 3 BO 3 5.0g (0.08mol), put into an agate mortar and grind for 1h to obtain a gray paste mixture;

[0039] b. Put the mixed material obtained in step a into a corundum crucible, put it into a high-temperature sintering furnace, raise the temperature to a pre-burning temperature of 750°C at a heating rate of 2°C / min, keep it warm for 15 hours, and then lower it to room temperature with the furnace to obtain a white color LiMgPO 4 : Tb, B pre-fired material;

[0040] c. After the reaction, the white LiMgPO 4 :Tb,B The pre-fired material was taken out from the crucible, and then ground with a glass mortar to eliminate agglomeration to obtain LiMgPO 4 : Tb, B powder;

[0041] d. Weigh 0.10 g of the powder obtained in step c and pour it into a one-way stainless steel stamping die with...

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Abstract

The invention relates to a preparation method of a terbium-doped lithium magnesium phosphate photoexcitation luminous dosimeter. The method comprises the following steps: grinding, presintering, and carrying out green compacting and high-temperature sintering on raw materials, namely LiOH.H2O, Mg(NO3)2.6H2O, NH4H2PO4, H3BO3 and Tb4O7. Compared with a powder material, the terbium-doped lithium magnesium phosphate photoexcitation luminous dosimeter obtained by the method disclosed by the invention is easier to carry in the aspect of monitoring a personal radiation dose; in the aspect of building an online measuring system for an optical fiber radiation dose, a flaky radiation dose sensitive material is integrated with optical fibers more easily to obtain a dose prober compared with the powder body; in the aspect of a preparation method of the dosimeter, intermediate powder is obtained by a low-temperature preinsertering method, so that material pollution and equipment damage caused in the process of sintering at high temperature and grinding in sequence to obtain the powder material are avoided; in addition, a large amount of time and resources are saved, and the quality of the material is improved; in the aspect of the performance of the dosimeter, the prepared dosimeter can be applied to measurement of personal doses and real-time online measurement of environmental and medical radiation doses.

Description

technical field [0001] The present invention relates to a kind of LiOH·H 2 O, Mg(NO 3 ) 2 ·6H 2 O, NH 4 h 2 PO 4 、H 3 BO 3 , Tb 4 o 7 As the starting material, terbium-doped lithium magnesium phosphate photo-excited luminescent dose tablets were prepared through a series of processes such as grinding, pre-sintering, compacting, and high-temperature sintering. Background technique [0002] The method of measuring the radiation dose by using the characteristic that the fluorescence intensity emitted by the light-excited luminescent material is directly proportional to the radiation dose absorbed by the material after being excited by external light is a new type of radiation dose testing technology that has emerged in recent years. This light-stimulated luminescence technology has the advantages of high sensitivity, wide measurable range, and online measurement, and has good application prospects in the fields of space dose monitoring, nuclear facility dose monitorin...

Claims

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Application Information

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IPC IPC(8): C09K11/70G01T1/10
CPCC09K11/7753G01T1/10
Inventor 陈朝阳孔熙瑞范艳伟盖敏强
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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