Preparation method of rare-earth aluminoborate fluorescent powder

A boro-aluminate and phosphor technology, applied in the field of red phosphor, can solve the problems of crystalline silicon not reaching the theoretical limit, low efficiency of single-crystalline silicon solar cells, etc.

Active Publication Date: 2017-05-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because monocrystalline silicon solar cells have not been effectively utilized in the ultraviolet or infrared region, the efficiency o...

Method used

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  • Preparation method of rare-earth aluminoborate fluorescent powder
  • Preparation method of rare-earth aluminoborate fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Li 2 AlBO 4 Phosphor powder

[0018] Take analytically pure lithium carbonate Li 2 CO 3 , aluminum oxide Al 2 o 3 , boric acid H 3 BO 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 1.

[0019] Table 1

[0020] raw material Li 2 CO 3

Al 2 o 3

h 3 BO 3

Weight (g) 0.3695 0.2549 0.3092

[0021] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible.

[0022] Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 820°C for 3 hours after 180 minutes. After the calcination process, the sample is cooled to room temperature with the furnace and taken out After taking it out, grind it into powder with an agate crucible to get Li 2 AlBO 4 Material.

Embodiment 2

[0023] Example 2: Li 1.97 AlBO 4:0.03Eu 3+ Phosphor powder

[0024] Take analytically pure lithium carbonate Li 2 CO 3 , aluminum oxide Al 2 o 3 , boric acid H 3 BO 3 and europium oxide Eu 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 2.

[0025] Table 2

[0026] raw material Li 2 CO 3

al 2 o 3

h 3 BO 3

Eu 2 o 3

Weight (g) 0.3639 0.2549 0.3092 0.0264

[0027] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible.

[0028] Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 820°C for 3 hours after 180 minutes. After the calcination process, the sample is cooled to room temperature with the furnace and taken out After taking it out, grind it into p...

Embodiment 3

[0029] Example 3: Li 1.95 AlBO 4:0.05Eu 3+ Phosphor powder

[0030] Take analytically pure lithium carbonate Li 2 CO 3 , aluminum oxide Al 2 o 3 , boric acid H 3 BO 3 and europium oxide Eu 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 3.

[0031] table 3

[0032] raw material SrCO 3

al 2 o 3

h 3 BO 3

Eu 2 o 3

Weight (g) 0.3602 0.2549 0.3092 0.044

[0033] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible.

[0034] Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 820°C for 3 hours after 180 minutes. After the calcination process, the sample is cooled to room temperature with the furnace and taken out After taking it out, grind it into powder ...

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Abstract

The invention discloses a preparation method of rare-earth aluminoborate fluorescent powder and relates to red fluorescent powder. The invention provides a preparation method of the rare-earth aluminoborate fluorescent powder. A preparation technology is simple; the preparation method is easy to operate and environmentally friendly; the cost is low; and the fluorescent powder is easily excited by ultraviolet. The method comprises the steps of putting lithium carbonate, boric acid, aluminum oxide and europium oxide into an agate mortar for grinding at an element mole ratio of Li:Al:B:Eu of (2-x):1:1:x of a chemical formula Li2 x(AlBO4):xEu<3+>, obtaining a mixture, heating and roasting the obtained mixture in air, and grinding the mixture after cooling to form the rare-earth aluminoborate fluorescent powder, wherein x is greater than or equal to 0 and less than or equal to 0.25. The heating and roasting temperature of the rare-earth aluminoborate fluorescent powder is less than 1000 DEG C; the energy consumption is low; the mass production is facilitated; the fluorescent powder is stable in performance, can be excited by near ultraviolet rays, and emits 570-640nm fluorescent light; and a good spectral transformation material is provided for while LED (light-emitting diode) and crystalline silicon solar batteries.

Description

technical field [0001] The invention relates to red fluorescent powder, in particular to a preparation method of rare earth boroaluminate fluorescent powder. Background technique [0002] As a high-quality and efficient lighting source, LED has significant advantages such as long life, fast response, clean and environmentally friendly lighting environment, high-efficiency and energy-saving lighting quality, and is known as the fourth-generation green lighting source, making it widely used in modern society and replacing The application of incandescent lamps. Due to its high brightness, clear picture and bright colors, LED display stands out in the field of public multimedia display ([1] Yang Yang. The Development of LED [J]. Science and Technology Information. 2009: 293). With the increasing requirements of the whole society for energy saving and emission reduction, the rapid development of white LED lighting technology and the wide application in lighting and display field...

Claims

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Application Information

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IPC IPC(8): C09K11/64
CPCC09K11/774
Inventor 郑淞生李震李莉骈琪麟郑将辉
Owner XIAMEN UNIV
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