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White-light fluorescent powder taking borate as single substrate and preparation method for white-light fluorescent powder

A fluorescent powder and borate technology, applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., can solve problems affecting color reproduction effect and lumen efficiency, poor white light color reproduction, unsatisfactory luminous performance, etc., to achieve Good practical application potential, excellent luminous efficiency and stability, ideal effect of color temperature

Active Publication Date: 2015-09-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The white light emitted by the blue-light chip to excite the YAG yellow-light phosphor has poor color reproduction and low color rendering index. There is currently a shortage of white-light phosphors matching the near-ultraviolet chip made of red, green and blue phosphors, and the luminous performance is not ideal. Moreover, the problems of color reabsorption between mixtures and the control of the ratio of phosphors of various colors also affect the color reproduction effect and lumen efficiency of the luminescence.

Method used

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  • White-light fluorescent powder taking borate as single substrate and preparation method for white-light fluorescent powder
  • White-light fluorescent powder taking borate as single substrate and preparation method for white-light fluorescent powder
  • White-light fluorescent powder taking borate as single substrate and preparation method for white-light fluorescent powder

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of white light phosphor with borate as a single matrix, its chemical formula is Na 3 Gd 1.99 Dy 0.01 (BO 3 ) 3 .

[0026] The preparation method of the above-mentioned white light phosphor with borate as a single matrix is ​​as follows:

[0027] (1) the raw material Na 2 CO 3 、Gd 2 o 3 、H 3 BO 3 、Dy 2 o 3 According to the ratio of the amount of substances of Na:Gd:B:Dy=3:1.99:3.15:0.01, after mixing in a mortar, grind for 30 minutes, make it fully mix uniformly, and obtain a mixture. Among them rare earth oxide Gd 2 o 3 and Dy 2 o 3 The purity is 99.99%, Na 2 CO 3 and H 3 BO 3 All are analytically pure. Considering the volatile characteristics of boric acid, it is weighed and used according to an excess of 5%.

[0028] (2) Put the mixture into a corundum crucible, place it in a rapid heating resistance furnace, raise the temperature from room temperature to 900 °C at a rate of 10 °C / min in an air atmosphere, keep it for 3 hours, and then coo...

Embodiment 2

[0030] A kind of white light phosphor with borate as a single matrix, its chemical formula is Na 3 Gd 1.99 Dy 0.01 (BO 3 ) 3 .

[0031] The preparation method of the above-mentioned white light phosphor with borate as a single matrix is ​​as follows:

[0032] (1) the raw material Na 2 CO 3 、Gd 2 o 3 、H 3 BO 3 、Dy 2 o 3 According to the amount ratio of Na:Gd:B:Dy=3:1.99:3.15:0.01, after mixing in a mortar, grind for 30 minutes, and make it fully mix uniformly to obtain a mixture. Among them rare earth oxide Gd 2 o 3 and Dy 2 o 3 The purity is 99.99%, Na 2 CO3 and H 3 BO 3 All are analytically pure. Considering the volatile characteristics of boric acid, weigh according to excess 5%.

[0033] (2) Put the mixture into a corundum crucible, place it in a rapid heating resistance furnace, raise the temperature from room temperature to 700 °C at a rate of 5 °C / min in an air atmosphere, keep it for 5 hours, and then cool it to room temperature with the furnace, ta...

Embodiment 3

[0035] A kind of white light phosphor with borate as a single matrix, its chemical formula is Na 3 Gd 1.97 Dy 0.03 (BO 3 ) 3 .

[0036] The preparation method of the above-mentioned white light phosphor with borate as a single matrix is ​​as follows:

[0037] (1) the raw material Na 2 CO 3 、Gd 2 o 3 、H 3 BO 3 、Dy 2 o 3 According to the ratio of the amount of substances of Na:Gd:B:Dy=3:1.97:3.15:0.03, after mixing in a mortar, grind for 35 minutes, make it fully mix uniformly, and obtain a mixture. Among them rare earth oxide Gd 2 o 3 and Dy 2 o 3 The purity is 99.99%, Na 2 CO 3 and H 3 BO 3 All are analytically pure. Considering the volatile characteristics of boric acid, weigh according to excess 5%.

[0038] (2) Put the mixture into a corundum crucible, place it in a rapid heating resistance furnace, raise the temperature from room temperature to 800 °C at a rate of 5 °C / min in an air atmosphere, keep it for 5 hours, and then cool it to room temperature...

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Abstract

The invention discloses white-light fluorescent powder taking borate as a single substrate and a preparation method for the white-light fluorescent powder. A general chemical formula of the white-light fluorescent powder is as follows: Na3Gd2-x(BO3)3:x:Dy<3+>, wherein x is greater than or equal to 0.01 but smaller than or equal to 0.15. Fluorescent powder is prepared by adopting a solid phase method, the process is simple, the calcination temperature is low, the preparation period is short and pollution on environment is avoided. The fluorescent powder is stable in performance, and white light emitted under near-ultraviolet excitation is high, and is close to ideal white light. And therefore, the white-light fluorescent powder has good application potential on LED (light-emitting diode) illumination development and industrial production.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder for LEDs, and relates to a white fluorescent powder with borate as a single matrix and a preparation method thereof. Background technique [0002] Compared with traditional lighting sources, Light Emitting Diode (LED) has many advantages such as small size, fast response, long life, low energy consumption, and no pollution. Its application in the fields of lighting and display, as well as its energy-saving properties have broad prospects. [0003] The white light emitted by the blue-light chip to excite the YAG yellow-light phosphor has poor color reproduction and low color rendering index. There is currently a shortage of white-light phosphors matching the near-ultraviolet chip made of red, green and blue phosphors, and the luminous performance is not ideal. Moreover, the problems of color reabsorption between the mixtures and the control of the ratio of phosphors of various colors al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
CPCY02B20/00
Inventor 任强魏腾跃霍哲哲王保兴陈娟妮张晋春武秀兰
Owner SHAANXI UNIV OF SCI & TECH
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