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Synthetic method of silicate orange red fluorescent powder for white light light-emitting diode (LED)

A synthesis method and silicate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of the luminescence performance and service performance decline of phosphors, and achieve good luminescence characteristics and stability, fine particles, and good repeatability. Effect

Active Publication Date: 2013-02-20
重庆美地路艺建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subsequent pulverization process will cause a significant drop in phosphor luminescence performance and usability

Method used

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  • Synthetic method of silicate orange red fluorescent powder for white light light-emitting diode (LED)
  • Synthetic method of silicate orange red fluorescent powder for white light light-emitting diode (LED)
  • Synthetic method of silicate orange red fluorescent powder for white light light-emitting diode (LED)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the general chemical formula Sr 2.94 SiO 5 : 0.06 Eu 2+ Weigh first (C 2 h 5 ) 4 SiO 4 0.1mol and dissolve it in 100ml of water, add 1ml of ethanol and a few drops of nitric acid, then stir vigorously to make (C 2 h 5 ) 4 SiO 4 fully hydrolyzed and form a transparent, clear solution; then weigh Sr(NO 3 ) 2 4H 2 O (A.R.) 0.294mol and Eu (NO 3 ) 3 ·6H 2 O (A.R.) 0.006mol, and then weighed 0.1wt% of the total mass of the above drugs, the surfactant sodium dodecylbenzene sulfonate and the chelating agent (ratio of reactant and chelating agent is 1:2); Dissolve in water to make solution 2 of 1mol / L; then add solution 2 dropwise into vigorously stirred solution 1, and finally form a clear solution, then age at a constant temperature of 80°C, and finally place the formed gel on The precursor powder is obtained in an oven; after mixing the precursor powder and flux evenly, calcining in a reducing atmosphere provided by the combustion of activated ca...

Embodiment 2

[0025] According to the general chemical formula Sr 2.90 Ca 0.04 SiO 5 : 0.06 Eu 2+ Weigh first (C 2 h 5 ) 4 SiO 4 0.1mol and dissolve it in 100ml of water, add 1ml of ethanol and a few drops of nitric acid, then stir vigorously to make (C 2 h 5 ) 4 SiO 4 fully hydrolyzed and form a transparent, clear solution; then weigh Sr(NO 3 ) 2 (A.R.) 0.29mol, Ca(NO 3 ) 2 4H 2 O (A.R.) 0.29mol and Eu (NO 3 ) 3 ·6H 2 O (A.R.) 0.006mol, and then weighed 0.1wt% of the total mass of the above drugs, the surfactant sodium dodecylbenzene sulfonate and the chelating agent (ratio of reactant and chelating agent is 1:2); Dissolve in water to make solution 2 of 1mol / L; then add solution 2 dropwise into vigorously stirred solution 1, and finally form a clear solution, then age at a constant temperature of 80°C, and finally place the formed gel on The precursor powder is obtained in an oven; after mixing the precursor powder and flux evenly, calcining in a reducing atmosphere prov...

Embodiment 3

[0027] According to the general chemical formula Sr 2.90 Mg 0.04 SiO 5 : 0.06 Eu 2+ Weigh first (C 2 h5 ) 4 SiO 4 0.1mol and dissolve it in 100ml of water, add 1ml of ethanol and a few drops of nitric acid, then stir vigorously to make (C 2 h 5 ) 4 SiO 4 fully hydrolyzed and form a transparent, clear solution; then weigh Sr(NO 3 ) 2 4H 2 O (A.R.) 0.29mol, Mg (NO 3 ) 2 ·6H 2 O (A.R.) 0.29mol and Eu (NO 3 ) 3 ·6H 2 O (A.R.) 0.006mol, and then weighed 0.1wt% of the total mass of the above drugs, the surfactant sodium dodecylbenzene sulfonate and the chelating agent (ratio of reactant and chelating agent is 1:2); Dissolve in water to make solution 2 of 1mol / L; then add solution 2 dropwise into vigorously stirred solution 1, and finally form a clear solution, then age at a constant temperature of 80°C, and finally place the formed gel on The precursor powder is obtained in an oven; after mixing the precursor powder and flux evenly, calcining in a reducing atmosph...

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Abstract

A synthetic method of silicate orange red fluorescent powder for a white-light light-emitting diode (LED) belongs to a preparation technique of rare earth phosphor. The chemical formula of the rare earth phosphor is Sr3-x-yMySiO5:Xeu2+(M=Mg, Ca and Ba), wherein 0<x<0.1, and 0<y<0.2. The synthetic method particularly comprises steps of weighting corresponding alkali metal salt, ethyl orthosilicate and europium nitrate according to stoichiometric ratio of each element; then weighting a surface active agent and a fluxing agent which are 0.1-2wt% of a total mass of a drug; sufficiently hydrolyzing the ethyl orthosilicate, mixing the alkali metal salt, the europium nitrate, the surface active agent and the chelating agent in an aqueous solution, and enabling the molar ratio of the reactant and the chelating agent to be 1:2-6; and then mixing the two solutions, sufficiently stirring to form a transparent and clear solution, ageing under constant temperature, drying to obtain predecessor powder, evenly mixing the predecessor powder and a cosolvent, burning for 3-6 hours in a reducing atmosphere, enabling the burning temperature to be 1100 DEG C-1400 DEG C, and then obtaining the needed fluorescent powder. The fluorescent powder prepared by the synthetic method is wide in excitation wavelength, high in light intensity, good in crystallinity and narrow in size distribution and can be used for red fluorescent powder for the white-light LED.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a method for synthesizing a silicate orange-red fluorescent powder for white light LEDs. Background technique [0002] As a new type of green solid-state lighting source, white LED is known as the fourth generation of green lighting source in the 21st century. Low heat (no heat radiation), low power consumption, long life (more than 10,000 hours), fast response and other advantages, widely used in mobile phones, LCD backlight, indicator lights, outdoor lighting, indoor lighting, landscape lighting, billboards , Traffic lights, etc., set off a white LED boom in the global semiconductor and lighting fields. At present, the white light LED mainly utilizes the emitted light of a light emitting diode (LED) to excite phosphor powder to realize white light emission. There are three main ways to realize white light LED: First, blue light chip and yellow phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
Inventor 彭玲玲韩涛曹仕秀其他发明人请求不公开姓名
Owner 重庆美地路艺建筑科技有限公司
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