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Vanadium-barium tungstate self-activation luminescent material, preparation methods and application

A luminescent material, barium vanadium tungstate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of high production cost, unstable matrix performance, etc. Effect

Inactive Publication Date: 2015-06-10
ANHUI XINDE CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing self-activated luminescent material technology, such as high production cost and unstable matrix performance, and provide a high-performance vanadium-tungsten with remarkable luminous efficiency, good photostability, simple preparation method and environmental protection Barium Oxide self-activated luminescent material, preparation method and application thereof

Method used

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  • Vanadium-barium tungstate self-activation luminescent material, preparation methods and application
  • Vanadium-barium tungstate self-activation luminescent material, preparation methods and application
  • Vanadium-barium tungstate self-activation luminescent material, preparation methods and application

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Effect test

Embodiment 1

[0035] Preparation of Ba 3 WVO 8.5

[0036] According to the chemical formula Ba 3 WVO 8.5 The stoichiometric ratio of each element in the raw material was weighed separately, barium carbonate BaCO 3 : 1.48 g, ammonium vanadate NH 4 VO 3 : 0.44 g, tungsten oxide WO 3 : 0.58 g, after grinding and mixing in an agate mortar, choose the air atmosphere for the first sintering, the sintering temperature is 300 ° C, the sintering time is 7 hours, then cool to room temperature, take out the sample, repeat the sintering operation, and carry out the second secondary sintering.

[0037] After the second sintering, the mixture was thoroughly mixed and ground again, and the third calcination was carried out at 700°C in an air atmosphere. The calcination time was 9 hours, cooled to room temperature, and the samples were taken out. Then fully mix and grind the mixture again, and perform the last calcination in the air atmosphere at 1000°C for 8 hours, cool to room temperature, and gr...

Embodiment 2

[0041] Preparation of Ba 3 W 0.5 Mo 0.5 V 0.5 P 0.5 o 8.5

[0042] According to the chemical formula Ba 3 W 0.5 Mo 0.5 V 0.5 P 0.5 o 8.5 The stoichiometric ratio of each element in the raw material was weighed separately, barium carbonate BaCO 3 : 1.48 g, tungsten oxide WO 3 : 0.29 g, ammonium molybdate (NH 4 ) 6 Mo 7 o 24 -4H 2 O: 0.22 g, ammonium vanadate NH 4 VO 3 : 0.22 g, ammonium dihydrogen phosphate NH 4 h 2 PO 4 : 0.14 g, after grinding and mixing in an agate mortar, select the air atmosphere for the first sintering, the sintering temperature is 450 ° C, the sintering time is 9 hours, then cool to room temperature, take out the sample, repeat the sintering operation, and carry out the second secondary sintering.

[0043] After the second sintering, the mixture was thoroughly mixed and ground evenly, and the third calcination was carried out in an air atmosphere at 900°C for 10 hours, cooled to room temperature, and samples were taken out. Then f...

Embodiment 3

[0046] Preparation of Ba 3 W 0.7 Mo 0.3 V 0.8 P 0.2 o 8.5

[0047] According to the chemical formula Ba 3 W 0.7 Mo 0.3 V 0.8 P 0.2 o 8.5 , respectively weigh barium carbonate BaCO 3 : 1.48 g, tungsten oxide WO 3 : 0.21 g, ammonium molybdate (NH 4 ) 6 Mo 7 o 24 -4H 2 O: 0.13 g, ammonium vanadate NH 4 VO 3 : 0.35 g, ammonium dihydrogen phosphate NH 4 h 2 PO 4 : 0.06 g, after grinding and mixing in an agate mortar, choose the air atmosphere for pre-sintering, the pre-sintering temperature is 250 ° C, the sintering time is 2 hours, then cool to room temperature, take out the sample; the raw material for the first sintering is again Thoroughly mix and grind evenly, carry out the second sintering in the air atmosphere, the sintering temperature is 900 ° C, the calcination time is 10 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in the muffle furnace, in the air atmosphere Calcining at a temperature of 11...

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Abstract

The invention relates to a vanadium-barium tungstate self-activation luminescent material, preparation methods and application. The luminescent material has a chemical formula of Ba3W1-xMoxV1-yPyO8.5, wherein 0<=x<=0.5 and 0<=y<=0.5. The luminescent material is prepared by respectively employing a high-temperature solid phase method and a solution method; the production cost and equipment requirement are low; and the prepared product has good color-rendering performance and stable luminescent performance, and is easy to operate and easy for industrialized production. The prepared material emits blue-green fluorescence with a main wavelength of 500 nm under the excitation of ultraviolet light, is widely applied to the fields of illumination and display; under excitation of X ray, the prepared material has high light output and fast attenuation, shows excellent scintillation luminescence performances, and is applicable to medical science fields such as positron emission tomography, X-ray computed tomography, X-ray fluorescence intensifying screen and the like, and other high-energy ray detection imaging technical fields.

Description

technical field [0001] The present invention relates to a self-activated luminescent material, a preparation method and its application, in particular to a vanadium barium tungstate self-activated luminescent material which emits blue-green fluorescence under ultraviolet and X-ray excitation, which can be used to prepare white LED lighting devices. The scintillating luminescent performance can be used in high-energy physical particle detection and medical imaging equipment, and belongs to the technical field of inorganic light-emitting materials. Background technique [0002] Usually, the luminescent material is composed of a host and an activator, and its luminescent performance mainly comes from the structural defects and impurity defects in the crystal lattice formed during the synthesis process. A certain element is added to the matrix material. During the high-temperature synthesis process, the ions of the added element are incorporated into the matrix lattice to form i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/68C09K11/71
Inventor 黄彦林关莹秦琳陶正旭
Owner ANHUI XINDE CHEM FIBER
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