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Aluminate red fluorescent powder and preparation method thereof

A technology of red fluorescent powder and aluminate, which is applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., can solve problems such as high cost, complicated circuit design, and immature technology, and achieve good thermal stability and chemical stability. The effect of stability

Inactive Publication Date: 2010-06-23
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to achieve white light by this method, because to achieve stable and efficient white light, the driving characteristics of three different color chips must be considered, and the circuit design is very complicated.
The second way is to use the quantum effect to realize single-chip white light, that is, to use the same semiconductor with different particle sizes to prepare chips to achieve white light. The white light LED realized by this method has high efficiency, but the cost is high and technically immature

Method used

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  • Aluminate red fluorescent powder and preparation method thereof
  • Aluminate red fluorescent powder and preparation method thereof
  • Aluminate red fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) 1mol SrCO 3 , 5.994mol Al 2 o 3 , 0.006mol MnO 2 , 0.006mol MgO and 0.35964mol H 3 BO 3 Mix, then put the mixture into a roller bottle machine and grind for 5h to obtain a phosphor precursor;

[0026] 2) Put the phosphor precursor into a high-temperature furnace for sintering in an air atmosphere. The sintering temperature is raised at a rate of 3°C / min. When the sintering temperature reaches 200°C, keep for 2 hours; continue to heat up at a rate of 3°C / min. Then when the sintering temperature reaches 1350°C, keep it for 4h; finally, drop it to room temperature at a cooling rate of 3°C / min;

[0027] 3) The obtained sintered material is ball milled with a ball mill, the time of ball milling is 3h, and the number of revolutions is 180r / min; after the ball milling is completed, the red fluorescent powder SrAl is obtained 11.988 mn 0.006 Mg 0.006 o 19 .

Embodiment 2

[0029] 1) 1mol SrCO 3 , 5.4mol Al 2 o 3 , 0.6mol MnO 2 , 0.6mol MgO and 0.324molH 3 BO 3 Mix, and then put the mixture into a roller bottle machine and grind for 15 hours to obtain a phosphor precursor;

[0030] 2) Put the phosphor precursor into a high-temperature furnace for sintering in a pure oxygen atmosphere. The sintering temperature is raised at a rate of 3°C / min. When the sintering temperature reaches 200°C, keep for 2 hours; continue at a rate of 3°C / min. Raise the temperature, and then keep it for 4 hours when the sintering temperature reaches 1350°C; finally, lower the temperature to room temperature at a cooling rate of 5°C / min;

[0031] 3) The obtained sintered product is ball milled with a ball mill, the time of ball milling is 10h, and the number of revolutions is 180r / min; after the ball milling is completed, the red fluorescent powder SrAl is obtained 10.8 mn 0.6 Mg 0.6 o 19 .

Embodiment 3

[0033] 1mol SrCO 3 , 5.7mol Al 2 o 3 , 0.3mol MnO 2 , 0.3mol MgO and 0.342molH 3 BO 3 Mix, then put the mixture into a ball mill and grind for 8h to obtain a phosphor precursor;

[0034] 2) Put the phosphor precursor into a high-temperature furnace for sintering in an air atmosphere. The sintering temperature is raised at a rate of 4°C / min. When the sintering temperature reaches 150°C, keep for 2 hours; continue to increase the temperature at a rate of 4°C / min. , and then when the sintering temperature reaches 1450°C, it is kept for 4h; finally, it is lowered to room temperature at a cooling rate of 4°C / min;

[0035] 3) Grinding the obtained sintered product with a roller bottle machine, the crushing time is 10h, and the rotation speed is 200r / min; after the ball milling is completed, the red fluorescent powder SrAl is obtained 11.4 mn 0.3 Mg 0.3 o 19 .

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Abstract

The invention discloses an aluminate red fluorescent powder and a preparation method thereof, wherein, the aluminate red fluorescent powder has the chemical components of SrAl(12-2x)MnxMgxO19, and 0.06<=x<=0.6. The aluminate red fluorescent powder is a new photon conversion material coated on an ultraviolet or blue light semiconductor chip, the excitation wavelength of the powder is 460nm, the emission peak wavelength is 665nm, and the excitation and emission properties are suitable for the requirement of packaging high-color gamut white light LEDs.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder for LEDs, and relates to aluminate red fluorescent powder and a preparation method thereof. Background technique [0002] With the continuous improvement of LED (light-emitting diode) lighting efficiency and the gradual reduction of cost, LED will become the mainstream of light sources for lighting and display by virtue of its long service life. To realize LEDs entering the general lighting and display fields, it is necessary to obtain high-efficiency white LEDs. [0003] At present, there are three main ways to realize white LED lighting. The first way is to combine red, green and blue LED chips to form white light. However, it is difficult to realize white light by this method, because to realize stable and efficient white light, the driving characteristics of three different color chips must be considered, and the circuit design is very complicated. The second way is to use the qu...

Claims

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Application Information

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IPC IPC(8): C09K11/64H01L33/50
CPCY02B20/181Y02B20/00
Inventor 王大伟陶淳
Owner IRICO
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