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Red phosphor for LED lamps and preparation method thereof

A technology for red phosphors and LED lamps, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of economic constraints, short duration of fluorescent materials, increased application costs, etc., and achieve good stability, non-toxic and harmless products. , the effect of high luminous intensity

Inactive Publication Date: 2016-02-24
陈桂兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the fluorescent materials of the above patents have a short duration, so they cannot be used for a long time, which will inevitably lead to an increase in application costs. Therefore, their popularization and use are restricted by economic aspects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of red fluorescent powder for LED lamp, the parts by weight of each component are:

[0024] 30 parts of europium-activated yttrium oxide, 20 parts of ferric oxide, 1 part of calcium orthophosphate, 1 part of binder, and 5 parts of talcum powder.

[0025] Its preparation method comprises the following steps:

[0026] Crush the raw materials, pass through a 100-mesh sieve, and mix well, then add glycerol to make the solid content 40%, and finally, the feed temperature is 25°C, the drying medium is nitrogen, the air inlet temperature is 130°C, and the air outlet temperature is 110°C Spray-dried under certain conditions to obtain the finished product.

Embodiment 2

[0028] A kind of red fluorescent powder for LED lamp, the parts by weight of each component are:

[0029] 40 parts of europium-activated yttrium oxide, 25 parts of ferric oxide, 5 parts of calcium orthophosphate, 5 parts of binder, and 10 parts of talcum powder.

[0030] Its preparation method comprises the following steps:

[0031] Crush the raw materials, pass through a 150-mesh sieve, mix well, add glycerol to make the solid content 50%, and finally, the feed temperature is 30°C, the drying medium is nitrogen, the air inlet temperature is 150°C, and the air outlet temperature is 120°C Spray-dried under certain conditions to obtain the finished product.

Embodiment 3

[0033] A kind of red fluorescent powder for LED lamp, the parts by weight of each component are:

[0034] 35 parts of europium-activated yttrium oxide, 23 parts of ferric oxide, 3 parts of calcium orthophosphate, 3 parts of binder, and 5 parts of talcum powder.

[0035] Its preparation method comprises the following steps:

[0036] Crush the raw materials, pass through a 130-mesh sieve, mix evenly, add glycerol to make the solid content 45%, and finally, the feed temperature is 27°C, the drying medium is nitrogen, the air inlet temperature is 140°C, and the air outlet temperature is 115°C Spray-dried under certain conditions to obtain the finished product.

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PUM

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Abstract

The invention relates to a red phosphor for LED lamps and a preparation method thereof, and belongs to the technical field of preparation of a phosphor for lamps. The red phosphor for LED lamps comprises the following ingredients (by weight): 30-40 parts of europium-activated yttrium oxide, 20-25 parts of ferroferric oxide, 1-5 parts of calcium orthophosphate, 1-5 parts of an adhesive and 5-10 parts of talcum powder. The preparation method comprises the following steps: crushing the raw materials, sieving through a sieve of 100-150 meshes, uniformly mixing, adding glycerin until solid content is 40-50%, and finally spray-drying under conditions of feeding temperature being 25-30 DEG C, drying medium being nitrogen, inlet air temperature being 130-150 DEG C and outlet air temperature being 110-120 DEG C, so as to obtain a finished product. The phosphor is applied in LED, and has high luminous intensity and excellent stability. In addition, the product is nontoxic and harmless and can be used for a long time.

Description

technical field [0001] The invention relates to a fluorescent powder and a preparation method thereof, in particular to a red fluorescent powder for LED lamps and a preparation method thereof, and belongs to the technical field of fluorescent powder preparation for lamps. Background technique [0002] Light-emitting diodes are referred to as LEDs for short. Made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc. LED is a semiconductor electronic component that can convert electrical energy into light energy. This electronic component appeared as early as 1962. In the early days, it could only emit red light with low luminosity. Later, other monochromatic light versions were developed. Today, the light that can be emitted has covered visible light, infrared rays and ultraviolet rays, and the luminosity has also increased to a considerable extent. of luminosity. And the use is also used as indicator lights, display panels, etc. from the be...

Claims

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Application Information

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IPC IPC(8): C09K11/81
Inventor 陈桂兴
Owner 陈桂兴
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