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Silicate yellow orange fluorescent powder

A phosphor and silicate technology, applied in the field of materials, can solve the problems of narrow half-height width of phosphor powder, large particle size of phosphor powder, unfavorable color rendering, etc.

Inactive Publication Date: 2013-08-21
西安创联电气科技(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the actual production process, Sr 2 SiO 4 :Eu 2+ Phosphor powder also has a narrow half-height width, which is unfavorable to the color rendering after lighting, and its temperature characteristic is slightly inferior to that of YAG:Ce. In addition, the particle size of phosphor powder is generally too large, which affects the light output effect.

Method used

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  • Silicate yellow orange fluorescent powder
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  • Silicate yellow orange fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] To prepare the general formula Sr 2-x-y-z Lu y Ba z SiO 4 :xEu 2+ Take 10g of silicate yellow-orange fluorescent powder as an example, where x is the number of moles of europium atoms, y is the number of moles of lutetium atoms, z is the number of moles of barium atoms, x is 0.07, y is 0.05, and z is 0.09 , the raw materials used and the preparation method thereof are as follows:

[0025] 1. Raw material pretreatment

[0026] Pre-fire europium oxide and lutetium oxide in a high-temperature furnace at 850°C for 2 hours to remove moisture and impurities.

[0027] 2. Ingredients

[0028] According to the general formula Sr 1.79 Lu 0.05 Ba 0.09 SiO 4 :0.07Eu 2+ Weigh 9.4152g of strontium carbonate, 0.3545g of lutetium oxide, 0.6328g of barium carbonate, 2.1408g of silicon dioxide, and 0.4389g of europium oxide, add 0.5g of barium fluoride, and grind for 20 minutes with a mortar to obtain a raw material mixture.

[0029] 3. Sintering

[0030] The raw material mi...

Embodiment 2

[0035] To prepare the general formula Sr 2-x-y-z Lu y Ba z SiO 4 :xEu 2+ Take 10g of silicate yellow-orange fluorescent powder as an example, where x is the number of moles of europium atoms, y is the number of moles of lutetium atoms, z is the number of moles of barium atoms, x is 0.07, y is 0.05, and z is 0.5 , the raw materials used and the preparation method thereof are as follows:

[0036] In the batching step 2 of embodiment 1, according to general formula Sr 1.38 Lu 0.05 Ba 0.5 SiO 4 :0.07Eu 2+ Weigh 6.7673g of strontium carbonate, 0.3305g of lutetium oxide, 3.2275g of barium carbonate, 1.9958g of silicon dioxide, and 0.4092g of europium oxide, add 0.5g of barium fluoride, and grind for 20 minutes with a mortar to obtain a raw material mixture. Other steps are the same as in Example 1 to prepare silicate yellow-orange phosphor.

Embodiment 3

[0038] To prepare the general formula Sr 2-x-y-z Lu y Ba z SiO 4 :xEu 2+ Take 10g of silicate yellow-orange fluorescent powder as an example, where x is the number of moles of europium atoms, y is the number of moles of lutetium atoms, z is the number of moles of barium atoms, x is 0.07, y is 0.05, and z is 0.9 , the raw materials used and the preparation method thereof are as follows:

[0039] In the batching step 2 of embodiment 1, according to general formula Sr 0.98 Lu 0.05Ba 0.9 SiO 4 :0.07Eu 2+ Weigh 4.5080g of strontium carbonate, 0.3100g of lanthanum oxide, 5.5340g of barium carbonate, 1.8722g of silicon dioxide, and 0.3838g of europium oxide, add 0.5g of barium fluoride, and grind for 20 minutes with a mortar to obtain a raw material mixture. Other steps are the same as in Example 1 to prepare silicate yellow-orange phosphor.

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Abstract

The invention relates to a silicate yellow orange fluorescent powder, which consists of materials represented by a general formula Sr<2-x-y-z>LuyBazSiO4:xEu<2+>, wherein in the formula, x is the mol number of europium atoms, y is the mol number of lutecium atoms, z is the mol number of barium atoms, x is greater than or equal to 0.005 but smaller than or equal to 0.15, y is greater than or equal to 0.01 but smaller than or equal to 0.15, and z is greater than or equal to 0 but is smaller than or equal to 1.5. The particle diameter of particles in the fluorescent powder is 5 to 13 mum, the excitation spectrum is wideband spectrum between 300nm and 500nm, the center wavelength of the excitation spectrum is 360nm, the emitting spectrum is band type spectrum lines being 470 to 700nm under theexcitation of 460nm ultraviolet light, the center wavelength is moved between 515nm and 570 nm along with the doping quantity increase of Ba, and the spectrum is the same as the spectrum of the conventional yellow, orange and yellow orange fluorescent powder. The silicate yellow orange fluorescent powder can be used for the coating of white-light light emitting diodes (LED) at various color temperatures, and in addition, the defect of red light lack of yttrium aluminum garnet (YAG) yellow fluorescent powder in the use process can be overcome.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a silicate yellow-orange fluorescent powder. Background technique [0002] At present, rare earth luminescent materials have become supporting materials in the fields of information display, lighting sources, optoelectronic devices, etc. The high luminous intensity and good microscopic morphology of phosphors can effectively improve the performance of devices. Therefore, the research and development of new fluorescent materials and Applications have always been one of the important research areas in materials chemistry and materials physics. The advancement of modern science and technology has continuously put forward new requirements for luminescent materials. In recent years, light-emitting diodes (LEDs) have the advantages of power saving, small size, low-voltage or low-current start-up, long life, shock resistance, recyclability, pollution-free, and planar Feat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79
CPCY02B20/181Y02B20/00
Inventor 武巧莉李永胜贺立龙张翼王飞胡娟韩领社吕俊峰
Owner 西安创联电气科技(集团)有限责任公司