Preparation method of chemical solution of terbium-doped tungsten molybdate green fluorescent microcrystalline

A technology of tungstomolybdate and green fluorescence, which is applied in chemical instruments and methods, luminescent materials, etc.

Inactive Publication Date: 2012-03-21
SICHUAN NORMAL UNIVERSITY
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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 prepare a class of terbium-doped tungstomolybdate solid solution green fluorescent microcrystals by using a chemical solution method—hydrothermal synthesis method, so as to solve the above-mentioned problems existing in the existing green phosphors

Method used

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  • Preparation method of chemical solution of terbium-doped tungsten molybdate green fluorescent microcrystalline
  • Preparation method of chemical solution of terbium-doped tungsten molybdate green fluorescent microcrystalline
  • Preparation method of chemical solution of terbium-doped tungsten molybdate green fluorescent microcrystalline

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Embodiment 1

[0018] Example 1: Ca 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 Preparation of microcrystals

[0019] According to a certain amount of target system Ca 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 The molar ratio of the raw materials required for microcrystals, measure the corresponding volume of Ca(NO 3 ) 2 and TbCl 3 solution in a polytetrafluoroethylene beaker, and then add the corresponding amount of Na 2 WO 4 and Na 2 MoO 4 Solution, stirred at room temperature for 15-30 minutes, then put the polytetrafluoroethylene beaker into the autoclave. After hydrothermal reaction at 80-180° C. for 15-30 hours, naturally cool to room temperature. The precipitate is centrifuged, washed with deionized water, and then dried at 100-150°C to obtain Ca 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 Microcrystalline.

Embodiment 2

[0020] Example 2: Ba 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 Preparation of microcrystals

[0021] In addition to Ca(NO 3 ) 2 replaced by Ba(NO 3 ) 2 Outside, all the other press embodiment 1 technique, prepare Ba 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 Microcrystalline.

Embodiment 3

[0022] Example 3: Sr 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 Preparation of microcrystals

[0023] In addition to Ca(NO 3 ) 2 Replaced by Sr(NO 3 ) 2 Outside, all the other press embodiment 1 technique, prepare Sr 0.975 (WO 4 ) 0.5 (MoO 4 ) 0.5 :Tb 3+ 0.05 Microcrystalline.

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Abstract

The invention relates to a preparation method of a chemical solution of terbium-doped tungsten molybdate green fluorescent microcrystalline. The green microcrystalline provided by the invention can be expressed by a general formula A0.925(WO4)0.5(MoO4)0.5:Tb3+0.05, wherein A=Ca, Sr and Ba. The preparation method comprises the following steps of: preparing the molar ratio of various raw materials required by a certain amount of target system, A0.925(WO4)0.5(MoO4)0.5:Tb3+0.05 microcrystalline, weighing a certain consistency and relative volume of A(NO3)2, TbCl3 solutions in a polytertrafluoroethylene beaker, respectively adding the relative amounts of Na2MoO4 and Na2WO4 solutions, stirring at the room temperature for 15-30min, and putting the polytertrafluoroethylene beaker into a high-pressure reaction kettle; naturally cooling down to the room temperature after carrying out a hydrothermal reaction under 80-180 DEG C for 15-30h; and centrifugalizing and cleaning in deionized water sediments, and baking the sediments under 100-150 DEG C to obtain the A0.925(WO4)0.5(MoO4)0.5:Tb3+0.05 solid solution luminescent microcrystalline. The invention has the advantages of environment protection, energy conservation, simple preparation processes and devices and low reaction temperature. The terbium-doped tungsten molybdate green fluorescent microcrystalline prepared by the preparation method disclosed by the invention has the advantages of pure phase, uniform granularity, suitable grain size, regular appearance, highly pure and bright green and excellent practicability.

Description

technical field [0001] The invention belongs to scheelite-structure luminescent materials, and relates to the research of a novel green phosphor, in particular to the preparation of a novel green fluorescent microcrystal of terbium-doped tungstomolybdate solid solution by a chemical solution method. Background technique [0002] Rare earth elements have unique 4f electron layer structure and abundant energy levels, which make them have spectral properties unmatched by general elements. Rare earth luminescent materials have the advantages of strong absorption, high conversion rate, emission from ultraviolet to infrared, strong emission in the visible region, and stable physical properties. Therefore, they are widely used in lighting sources, color TVs, computers, modern communications, There are extremely important and extensive applications in many fields such as measurement technology, medical equipment, industrial transportation, aerospace and national defense. [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68
Inventor 赖欣魏艳艳高道江秦丹毕剑李阳李林奕赁敦敏
Owner SICHUAN NORMAL UNIVERSITY
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