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Silicon-based nitrogen oxide LED (light-emitting diode) fluorescent powder and preparation method therefor

A nitrogen oxide and phosphor technology, which is applied in the field of rare earth luminescent materials, can solve the problems of high production cost and complicated preparation process of nitride phosphors, and achieves easy operation, good luminous intensity and anti-aging performance, and improved luminous performance. Effect

Inactive Publication Date: 2015-11-11
烟台同立高科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex preparation process and high production cost of existing nitride phosphors, and provide a silicon-based nitrogen oxide LED phosphor and its preparation method

Method used

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  • Silicon-based nitrogen oxide LED (light-emitting diode) fluorescent powder and preparation method therefor
  • Silicon-based nitrogen oxide LED (light-emitting diode) fluorescent powder and preparation method therefor

Examples

Experimental program
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Embodiment 1

[0029] (1) According to the chemical composition Ca 0.94 Si 2 o 2 N 2 :Eu 2+ 0.05 , Dy 3+ 0.01 The metering ratio weighs the following raw materials: Ca(NO 3 ) 2 , Eu(NO 3 ) 3 , Dy(NO 3 ) 3 and silicon nitride powder, the Ca(NO 3 ) 2 , Eu(NO 3 ) 3 and Dy(NO 3 ) 3Place in deionized water, stir and mix evenly to obtain the first solution with a concentration of 0.2-0.5mol / L, heat the above-mentioned first solution with a 60°C water bath; take high-purity silicon nitride powder, add it to deionized water for ultrasonic dispersion for 5 minutes Finally, pour it into the first solution to obtain the second suspension, and keep stirring at a rotating speed of 300r / min; then add the precipitant oxalic acid crystals to the second suspension, coprecipitate to generate a large amount of white product, and raise the temperature of the water bath To 85°C, keep warm for 2 hours, filter with suction, dry in a blast oven at 100°C for 8 hours, grind, and pass through a 200-m...

Embodiment 2

[0035] (1) According to the chemical composition Ca 0.93 Si 2 o 2 N 2 :Eu 2+ 0.05 , Dy 3+ 0.01 , Li + 0.01 The metering ratio weighs the following raw materials: Ca(NO 3 ) 2 , Eu(NO 3 ) 3 , Dy(NO 3 ) 3 、LiNO 3 and silicon nitride powder, the Ca(NO 3 ) 2 , Eu(NO 3 ) 3 , Dy(NO 3 ) 3 and LiNO 3 Place in deionized water, stir and mix evenly to obtain the first solution with a concentration of 0.2-0.5mol / L, heat the above-mentioned first solution with a 60°C water bath; take high-purity silicon nitride powder, add it to deionized water for ultrasonic dispersion for 5 minutes Finally, pour it into the first solution to obtain the second suspension, and keep stirring at a rotating speed of 300r / min; then add the precipitant oxalic acid crystals to the second suspension, coprecipitate to generate a large amount of white product, and raise the temperature of the water bath To 85°C, keep warm for 2 hours, filter with suction, dry in a blast oven at 100°C for 8 hour...

Embodiment 3

[0049] (1) According to the general chemical formula Sr 0.98 Si 2 o 2 N 2 :Eu 0.01 ,Tb 0.01 The metering ratio in weighs the following raw materials: Sr(NO 3 ) 2 , Eu(NO 3 ) 3 and Tb(NO 3 ) 3 , the Sr(NO 3 ) 2 and Eu(NO 3 ) 3 Place in deionized water, stir and mix evenly to obtain the first solution with a concentration of 0.2-0.5mol / L, heat the above-mentioned first solution with a 40°C water bath; take high-purity silicon nitride powder, add it to deionized water for ultrasonic dispersion for 5 minutes Finally, add it to the first solution to obtain the second suspension, keep stirring at a speed of 300r / min; then dissolve the precipitating agent urea in deionized water and add it to the second suspension, heat slowly and heat up, homogeneous Precipitation produces a large amount of white product, raise the temperature of the water bath to 80°C, keep it warm for 2 hours, filter it with suction, dry it in a blast drying oven at 100°C for 8 hours, grind it, and p...

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Abstract

The invention discloses silicon-based nitrogen oxide LED (light-emitting diode) fluorescent powder and a preparation method therefor. A general chemical formula of the silicon-based nitrogen oxide LED fluorescent powder is as follows: M(1-x-y-z)Si2O2N2:Eux, Ry, Az, wherein M is an alkaline-earth metal element; Eu is an activator; R is a codoping ion; A is a charge compensating agent; x is greater than or equal to 0.001 but less than or equal to 0.1; y is greater than or equal to 0.001 but less than or equal to 0.1; and z is greater than or equal to 0 but less than or equal to 0.01. The fluorescent powder disclosed by the invention is uniform in structure, and good in luminescent intensity and ageing resistance. Moreover, the preparation method for the fluorescent powder is simple; the cost is low; and the ball-milling is not needed. Therefore, the fluorescent powder and the preparation method therefor have a broad industrial application prospect.

Description

technical field [0001] The invention relates to a silicon-based nitrogen oxide fluorescent powder and a preparation method thereof, belonging to the field of rare earth luminescent materials. Background technique [0002] With the increasingly serious world energy crisis, emerging energy projects and energy-saving and environmental protection industries have become topics of widespread concern in the world. Because of its outstanding advantages such as high luminous efficiency, low energy consumption, low working voltage, short response time, long service life, and small product size, white LEDs have broad application prospects in the fields of green lighting and information display, showing great promise. market value. It is impossible for a single LED chip to emit white light with a continuous spectrum. The current method of obtaining white light is generally to convert the monochromatic light emitted by the LED through phosphor powder, and combine to obtain the white lig...

Claims

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Application Information

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IPC IPC(8): C09K11/59
Inventor 郭大为李绍霞吕东郭大荣
Owner 烟台同立高科新材料股份有限公司
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