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Warm white mixed fluorescent material with color rendering index of more than 90 and preparation method thereof

A fluorescent material, warm white light technology, applied in luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve problems such as energy consumption, and achieve the effects of stable product quality, low cost and simple process

Inactive Publication Date: 2012-06-27
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production is usually obtained by the traditional high-temperature solid-phase sintering method, which has the disadvantage of energy consumption. The high-temperature microwave production technology that is energy-saving and easy to mass-produce has industrial-scale production value

Method used

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  • Warm white mixed fluorescent material with color rendering index of more than 90 and preparation method thereof
  • Warm white mixed fluorescent material with color rendering index of more than 90 and preparation method thereof
  • Warm white mixed fluorescent material with color rendering index of more than 90 and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of warm white light mixed fluorescent material with color rendering greater than 90, made of Ba 2.84 MgSi 2 o 8 :0.06Eu 2+ , 0.1Mn 2+ and Sr 1.94 SiO 4 :0.06Eu 2+ Composition, Ba 2.84 MgSi 2 o 8 :0.06Eu 2+ , 0.1Mn 2+ with Sr 1.94 SiO 4 :0.06Eu 2+ The molar ratio is 1:0.35.

[0025] The preparation method of the mixed fluorescent material is prepared by a high-temperature microwave method, and the steps are as follows:

[0026] 1) Press Ba 2.84 MgSi 2 o 8 :0.06Eu 2+ , 0.1Mn 2+ The molar ratio of each component is 142:50:100:3:5:30 and weighs 5.6611 grams of BaCO 3 , 0.4034 grams of MgO, 1.2016 grams of SiO 2 , 0.1056 g Eu 2 o 3 , 0.1151 g MnCO 3 , 0.3213 g NH 4 Cl, according to the volume ratio of raw materials and absolute ethanol is 1:1, add absolute ethanol and stir until slurry and disperse evenly, then dry at 60°C for 10 hours, grind and loosen, place in a crucible and put in a high-temperature microwave oven , feed the mixed gas of ...

Embodiment 2

[0031] A kind of warm white light mixed fluorescent material with color rendering greater than 90, made of Ba 2.83 MgSi 2 o 8 :0.07Eu 2+ , 0.1Mn 2+ with Sr 1.93 SiO 4 :0.07Eu 2+ Composition, Ba 2.83 MgSi 2 o 8 :0.07Eu 2+ , 0.1Mn 2+ with Sr 1.93 SiO 4 :0.07Eu 2+ The molar ratio is 1:0.425.

[0032] The preparation method of the mixed fluorescent material is prepared by a high-temperature microwave method, and the steps are as follows:

[0033] 1) Press Ba 2.83 MgSi 2 o 8 :0.07Eu 2+ , 0.1Mn 2+ The molar ratio of each component is 283:100:200:7:10:60 and weighs 5.6411 grams of BaCO 3 , 0.4034 grams of MgO, 1.2016 grams of SiO 2 , 0.1232 grams of Eu 2 o 3 , 0.1151 g MnCO 3 , 0.3213 g NH 4 Cl, according to the volume ratio of raw materials and absolute ethanol as 1:1, add ethanol and stir until slurry and disperse evenly, then dry at 60°C for 10 h, grind and loosen, place in a crucible and put it in a high-temperature microwave oven, Enter the mixture of r...

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Abstract

The invention provides a warm white mixed fluorescent material with a color rendering index of more than 90. The material comprises Ba3MgSi2O8: Eu<2+>, Mn<2+> and Sr2SiO4: Eu<2+>. A preparation method for the material comprises the following steps: accurately weighing raw materials, mixing the raw materials, adding ethanol into the raw materials, carrying out stirring until slurry is obtained, respectively employing a high temperature microwave method for heating and cooling obtained mixtures in a high temperature microwave oven according to set heating and cooling curves, mixing two obtained products in proportion, adding anhydrous ethanol into an obtained mixture, carrying out ultrasonic vibration and drying the mixture so as to obtain the warm white mixed fluorescent material with a color rendering index of more than 90. The fluorescent material and a blue-violet light semiconductor chip can be assembled and encapsulated together so as to prepare a warm white LED with a color rendering index of more than 90. The preparation method provided in the invention has the advantages of a simple process, low cost, energy conservation, no pollution and high yield; the prepared material has stable quality and high brightness; the invention is suitable for industrial large scale production.

Description

【Technical field】 [0001] The invention relates to the field of semiconductor optoelectronic materials and devices, in particular to a warm white mixed fluorescent material with a color rendering property greater than 90 and a preparation method thereof. 【Background technique】 [0002] The white light LED of semiconductor lighting technology is mainly prepared according to the principle of white light three-primary color matching. One way is to use red, green, and blue three primary color semiconductor chips and assemble them together to realize white light. Due to the complexity of the design circuit, the mixed white light has problems such as color coordinate drift, which limits its large-scale application. Another way is to use blue LED chips and blue light-excited phosphors YAG:Ce to generate yellow-green phosphors to form white light. This scheme has been researched and applied earlier, with mature preparation technology and stable products, but there is a problem with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59H01L33/50
CPCY02B20/181Y02B20/00
Inventor 王达健李建陆启飞宋俊曹利生王龄昌王延泽马健董晓菲
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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