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Thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor and preparation method thereof

A lithium-magnesium phosphate and optical-luminescence technology, applied in chemical instruments and methods, luminescent materials, etc., to achieve the effects of not being easy to emit light, good sensitivity, and good temperature stability

Inactive Publication Date: 2015-01-28
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing optical luminescent materials are difficult to meet these requirements at the same time

Method used

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  • Thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor and preparation method thereof
  • Thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor and preparation method thereof
  • Thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A thulium-terbium-doped lithium magnesium phosphate photoluminescent phosphor, which uses LiMgPO 4 As the main body, doped with thulium and terbium, thulium accounts for LiMgPO 4 The molar percentage of terbium is 0.01~1mol%, and terbium accounts for LiMgPO 4 The molar percentage of is 0.01~1mol%. Among them, LiMgPO 4 As the matrix material, thulium and terbium are used as activated impurities.

[0039] Preferably, thulium occupies LiMgPO 4 The molar percentage of terbium is 0.1~1mol%, and terbium accounts for LiMgPO 4 The molar percentage is 0.1~1mol%.

[0040] The thulium-terbium-doped lithium magnesium phosphate light-emitting phosphor can be prepared through the following steps:

[0041] (1) The doped raw material Tm 2 o 3 , Tb 4 o 7 with matrix material LiOH·H 2 O, NH 4 h 2 PO 4 and Mg(NO 3 ) 2 ·6H 2 O is mixed according to the proportion, ground and stirred evenly, and crystal water is precipitated from the mixture during the stirring process, mak...

Embodiment 2

[0047] In order to verify the effects of the present invention, specific experiments were carried out. The raw materials used are specifically: the matrix material is LiOH·H 2 O, NH 4 h 2 PO 4 and Mg(NO 3 ) 2 ·6H 2 O, all analytically pure. Impurity material selection Tm 2 o 3 and Tb 4 o 7 , with a purity of 99.9%.

[0048] (1) Add 0.1 mol of LiOH·H 2 O, 0.01 mol NH 4 h 2 PO 4 , 0.1 mol of Mg(NO 3 ) 2 ·6H 2 O, 0.000125mol of Tb 4 o 7 Tm of about 9.4 mg and 0.00025 mol 2 o 3 Mix about 9.7 mg, put it into an agate mortar, add an appropriate amount of deionized water, and grind until it is uniform. Water of crystallization precipitated from the mixture during stirring, making the mixture a paste.

[0049] The chemical reaction equation of the base material is:

[0050] LiOH·H 2 O+Mg(NO 3 ) 2 ·6H 2 O+NH 4 h 2 PO 4 =LiMgPO 4 +2HNO 3 +

[0051] NH 3 +8H 2 O.

[0052] (2) Dry the pasty mixture. Specifically, the mixture in step (1) is put into a...

Embodiment 3

[0060] In order to verify the effects of the present invention, specific experiments were carried out. The raw materials used are specifically: the matrix material is LiOH·H 2 O, NH 4 h 2 PO 4 and Mg(NO 3 ) 2 ·6H 2 O, all analytically pure. Impurity material selection Tm 2 o 3 and Tb 4 o 7 , with a purity of 99.9%.

[0061] (1) Add 0.1 mol of LiOH·H 2 O, 0.1 mol NH 4 h 2 PO 4 , 0.1 mol of Mg(NO 3 ) 2 ·6H 2 O, 0.000125mol of Tb 4 o 7 and a Tm of 0.0005mol 2 o 3 Mix them, put them into an agate mortar, add an appropriate amount of deionized water, and grind them until they are uniform. Water of crystallization precipitated from the mixture during stirring, making the mixture a paste.

[0062] The chemical reaction equation of the base material is:

[0063] LiOH·H 2 O+Mg(NO 3 ) 2 ·6H 2 O+NH 4 h 2 PO 4 =LiMgPO 4 +2HNO 3 +

[0064] NH 3 +8H 2 O.

[0065] (2) Dry the pasty mixture. Specifically, the mixture in step (1) is put into an alumina cru...

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Abstract

The invention discloses a thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor and a preparation method thereof. The phosphor utilizes LiMgPO4 as a main body and is doped by thulium and terbium. A ratio of thulium to LiMgPO4 is in a range of 0.01-1mol% and a ratio of terbium to LiMgPO4 is in a range of 0.01-1mol%. The preparation method comprises mixing Tm2O3 and Tb4O7 as doping raw materials, LiOH.H2O, NH4H2PO4 and Mg(NO3)2.6H2O according to a certain ratio, carrying out grinding and stirring to obtain a uniform mixture, carrying out drying, sintering the dried mixture to obtain the thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor. The thulium-terbium-doped lithium-magnesium phosphate optically stimulated luminescence phosphor has good sensitivity, moderate photopeak temperature, weak low-temperature peak signal, a simple and single high-temperature main peak, luminescence peak wavelength of about 455nm, good temperature stability and low luminescence decline, can be prepared conveniently and has a low cost.

Description

technical field [0001] The invention relates to the field of photoluminescent detectors, in particular to a lithium magnesium phosphate photoluminescent phosphor doped with thulium and terbium for photoluminescent detectors and a preparation method thereof. Background technique [0002] Optically stimulated luminescence (OSL) refers to a physical phenomenon in which the stored energy is released in the form of light during the photoexcitation process after a substance is exposed to radiation. [0003] In order to detect radiation, different types of radiation detectors have been created using different principles depending on the field and scope of use. For example: using gas molecules to be ionized by radiation, people have made ionization chambers; using semiconductors to generate electron-hole pairs when they are irradiated, people have made semiconductor detectors; using scintillation materials to emit light when they are irradiated, people have made Scintillation count...

Claims

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Application Information

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IPC IPC(8): C09K11/70
Inventor 唐强郭竞渊张纯祥罗达玲
Owner SUN YAT SEN UNIV
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