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Terbium doped yttrium strontium triborate green fluorescent powder, and preparation method thereof

A technology of green fluorescent powder and yttrium triborate, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of high color temperature and low color rendering index, and achieve the effects of high luminous intensity, good luminous performance and strong operability

Inactive Publication Date: 2019-01-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a terbium-doped yttrium-strontium triborate-based green phosphor and its preparation method to solve the problems of low color rendering index and high color temperature in traditional white light LEDs

Method used

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  • Terbium doped yttrium strontium triborate green fluorescent powder, and preparation method thereof
  • Terbium doped yttrium strontium triborate green fluorescent powder, and preparation method thereof
  • Terbium doped yttrium strontium triborate green fluorescent powder, and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0029] According to chemical formula Sr 3 Y 0.99 (BO 3 ) 3 : Stoichiometric ratio of 0.01Tb, use an electronic balance to accurately weigh SrCO 3 , Y 2 o 3 、H 3 BO 3 , Tb 4 o 7 , wherein the purity of rare earth oxides is 99.99%, and the rest are analytically pure. After grinding and mixing the above raw materials evenly, put them into a corundum crucible, place them in a rapid heating resistance furnace, raise the temperature to 1200°C in an air atmosphere at a rate of 5°C / min, keep it warm for 5 hours, and then cool with the furnace, and wait for the sample to cool to room temperature. Take out the sample and grind it again to get Tb 3+ Doped yttrium strontium triborate green phosphor.

Embodiment 2

[0031] According to chemical formula Sr 3 Y 0.98 (BO 3 ) 3 : Stoichiometric ratio of 0.02Tb, use an electronic balance to accurately weigh SrCO 3 , Y 2 o 3 、H 3 BO 3 , Tb 4 o 7 , wherein the purity of rare earth oxides is 99.99%, and the rest are analytically pure. Grind and mix the above raw materials evenly, put them into a corundum crucible, place them in a rapid heating resistance furnace, raise the temperature to 1250°C in an air atmosphere at a rate of 8°C / min, keep it warm for 5 hours, then cool with the furnace, and wait for the sample to cool to room temperature. Take out the sample and grind it again to get Tb 3+ Doped yttrium strontium triborate green phosphor.

Embodiment 3

[0033] According to chemical formula Sr 3 Y 0.96 (BO 3 ) 3: Stoichiometric ratio of 0.04Tb, use an electronic balance to accurately weigh SrCO 3 , Y 2 o 3 、H 3 BO 3 , Tb 4 o 7 , wherein the purity of rare earth oxides is 99.99%, and the rest are analytically pure. Grind and mix the above raw materials evenly, put them into a corundum crucible, place them in a rapid heating resistance furnace, raise the temperature to 1250°C in an air atmosphere at a rate of 10°C / min, keep it warm for 5 hours, then cool with the furnace, and wait for the sample to cool to room temperature. Take out the sample and grind it again to get Tb 3+ Doped yttrium strontium triborate green phosphor.

[0034] figure 1 Is the Sr prepared in Example 3 3 Y 0.96 (BO 3 ) 3 : 0.04Tb phosphor and Sr 3 Y(BO 3 ) 3 The X-ray diffraction pattern of the matrix and the Ba 3 Dy(BO 3 ) 3 Standard card (PDF#50-0098) comparison chart. Sr is currently not found in the PDF card library 3 Y(BO 3 ) ...

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Abstract

The invention discloses a terbium doped yttrium strontium triborate green fluorescent powder, and a preparation method thereof. The chemical general formula is Sr<3>Y<1-x>(BO<3>)<3>:<x>Tb, wherein 0.01<=x<=0.15.The terbium doped yttrium strontium triborate green fluorescent powder can be excitated by near ultraviolet light to emit high purity green light. The terbium doped yttrium strontium triborate green fluorescent powder is prepared based on solid phase synthesis at an air atmosphere. The preparation method is simple; the reproducibility is high; the preparation period is short; no pollutant is discharged; the preparation method is friendly to the environment; operation is convenient; and industrialized production can be realized easily.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder for LEDs, and relates to a terbium-doped yttrium strontium triborate-based green fluorescent powder and a preparation method thereof. Background technique [0002] Light Emitting Diode (LED) is recognized as a new light source in the 21st century. It has many advantages such as energy saving, fast response, green environmental protection, long life, small size, and high luminous efficiency. Application prospects. [0003] The current commercial green phosphor is mainly Zn 2 SiO 4 :Mn 2+ and BaAl 12 o 19 :Mn 2+ , however Mn 2+ The afterglow time of ions is long, and the application is limited. Therefore, the development of green phosphors that can be effectively excited by near-ultraviolet and blue light has practical application value. Red, green, and blue phosphors are coated on the near-ultraviolet LED chip, and the blue, green, and red phosphors are excited by near-ultraviol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
CPCC09K11/778
Inventor 武秀兰郑金乐任强海鸥白文妮任宇涵
Owner SHAANXI UNIV OF SCI & TECH
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