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Fluoborate down-conversion luminescent material and preparation method thereof

A technology of luminescent materials and fluoroborate, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of non-environmental friendly preparation process, unstable physical and chemical properties, low luminous efficiency, etc., and achieve the improvement of green light luminous efficiency, physical and chemical The effect of stable properties and enhanced luminous performance

Inactive Publication Date: 2019-08-16
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical and chemical properties of the green phosphor commonly used in the market are unstable, the preparation process is not environmentally friendly, and the luminous efficiency is low under the ultraviolet excitation light of 240-280nm, which cannot meet people's needs.

Method used

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  • Fluoborate down-conversion luminescent material and preparation method thereof
  • Fluoborate down-conversion luminescent material and preparation method thereof
  • Fluoborate down-conversion luminescent material and preparation method thereof

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preparation example Construction

[0023] The chemical formula of the fluoroborate down-conversion luminescent material in the present invention is Sr 5-x Tb x (BO 3 ) 3 F, where x is Tb 3+ The doping metering coefficient of , and the value range of x is 0.0001~0.15. The specific steps of the preparation method of the fluoroborate down-conversion luminescent material are as follows: according to the chemical formula Sr 5-x Tb x (BO 3 ) 3 The stoichiometric ratio of each element in F, where x ranges from 0.0001 to 0.15, respectively weigh strontium-containing compounds, boron-containing compounds, fluorine-containing compounds, and terbium-containing compounds, and grind and mix to obtain the original powder; the original powder Carry out pre-sintering in the air environment to obtain pre-sintered powder. The pre-sintering temperature is 350-550°C, and the pre-sintering time is 2-4 hours. Carry out final sintering to obtain the final sintering powder, the final sintering temperature is 800-1100°C, and th...

Embodiment 1

[0027] According to the chemical formula Sr 4.990 Tb 0.010 (BO 3 ) 3 The stoichiometric ratio of each element in F, prepare a phosphor powder with a total amount of 1mmol, weigh strontium carbonate SrCO 3 4.990mmol, boric acid H 3 BO 3 1mmol, strontium fluoride SrF 2 1mmol, doped with terbium oxide Tb at a Tb content of 0.010mmol 4 o 7 , which can be recorded as Sr with 1.0% Tb doping 5 (BO 3 ) 3 F, can be recorded as Sr 5 (BO 3 ) 3 F: 1.0% Tb; the weighed strontium carbonate SrCO 3, boric acid H 3 BO 3 , strontium fluoride SrF 2 , terbium oxide Tb 4 o 7 In an agate mortar, grind for about 5-30 minutes to obtain the original powder, move the mixed original powder into a crucible, and then put it into a high-temperature calciner for pre-sintering in an air environment. The pre-sintering temperature is 350 -550°C, the pre-sintering time is 2-4h, and the pre-sintering powder is obtained after the pre-sintering process is completed; after the pre-sintering powde...

Embodiment 2

[0030] According to the chemical formula Sr 4.985 Tb 0.015 (BO 3 ) 3 The stoichiometric ratio of each element in F, prepare a phosphor powder with a total amount of 1mmol, weigh strontium carbonate SrCO 3 4.985mmol, boric acid H 3 BO 3 1mmol, strontium fluoride SrF 2 is 1 mmol, doped with terbium oxide Tb at a Tb content of 0.015 mmol 4 o 7 , which can be recorded as Sr with 1.5% Tb doping 5 (BO 3 ) 3 F, can be recorded as Sr 5 (BO 3 ) 3 F: 1.5% Tb; the weighed strontium carbonate SrCO 3 , boric acid H 3 BO 3 , strontium fluoride SrF 2 , terbium oxide Tb 4 o 7 In an agate mortar, grind for about 5-30 minutes to obtain the original powder, move the mixed original powder into a crucible, and then put it into a high-temperature calciner for pre-sintering in an air environment. The pre-sintering temperature is 350 -550°C, the pre-sintering time is 2-4h, and the pre-sintering powder is obtained after the pre-sintering process is completed; after the pre-sintering...

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Abstract

The invention discloses a fluoborate down-conversion luminescent material and a preparation method thereof. The chemical formula of the fluoborate down-conversion luminescent material is Sr5-xTbx(BO3)3F, wherein x is the doping coefficient of Tb3+ and ranges from 0.0001 to 0.15. The Tb3+ is doped in the strontium fluoborate matrix, so that the luminous efficiency of green light generated by the material is obviously improved, and the luminous performance is greatly enhanced. The material is stable in physicochemical property and simple and convenient to prepare.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a fluoroborate down-conversion luminescent material and a preparation method. Background technique [0002] At present, luminescent materials are not only widely used in chemical production, medical diagnosis, agricultural planting and other fields, but also more and more close to our daily life. Materials doped with transition metal elements and rare earth elements are used in optical displays and indicator lighting. All have great application value. In order to enable the efficient production and use of luminescent materials, a lot of research has been done on the preparation and luminescent properties of nano-luminescent materials doped with transition metal ions and rare earth ions for decades. [0003] The advent of white light-emitting diodes is a lighting revolution that is being bred after the development of semiconductor technology has triggered the microelectronics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/63
CPCC09K11/7755
Inventor 易昌凤乔晨旭徐祖顺陈俊董明浩
Owner HUBEI UNIV