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Red fluorescence powder with high color rendering and low light attenuation and preparation method thereof

A red fluorescent powder, high color rendering technology, applied in chemical instruments and methods, luminescent materials, gaseous chemical plating, etc., to achieve the effect of improving color rendering, high luminous efficiency, and improving stability

Active Publication Date: 2017-05-31
DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of backlight, display lighting and white LED suitable for mobile phones, computers, PADs, etc. High color rendering, low light decay red phosphor

Method used

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  • Red fluorescence powder with high color rendering and low light attenuation and preparation method thereof
  • Red fluorescence powder with high color rendering and low light attenuation and preparation method thereof
  • Red fluorescence powder with high color rendering and low light attenuation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1Sr 0.890 Ca 0.100 SiAlN 3 Cl 0.110 f 0.030 : Eu 0.01

[0061] Step (1): According to the chemical formula Sr 0.890 Ca 0.100 SiAlN 3 Cl 0.110 f 0.030 : Eu 0.01 The stoichiometric ratio weighs 46.37 grams of strontium nitride, 2.66 grams of calcium nitride, 22.03 grams of aluminum nitride, 25.13 grams of silicon nitride, 0.6 grams of ammonium fluoride, 2.10 grams of ammonium chloride, and 1.12 grams of europium oxide;

[0062] Step (2): Fully mix the above raw materials evenly under nitrogen protection with a purity of 99.999%;

[0063] Step (3): Seal the uniformly mixed raw materials into a molybdenum crucible, cover and seal it, and burn it in stages under a pressure of 0.8Mpa in a nitrogen protection atmosphere with a purity of 99.999%: normal temperature (the normal temperature of the present invention is 25° C.) After reaching 1000°C, burn at a constant temperature of 1000°C for 5 hours, then rise to 1400°C for 5 hours, and finally rise to 1800°C...

Embodiment 1-3

[0076] Step (1): According to the chemical formula Sr 0.890 Ca 0.100 SiAlN 3 f 0.030 : Eu 0.010 The stoichiometric ratio weighs 46.37 grams of strontium nitride, 2.66 grams of calcium nitride, 22.03 grams of aluminum nitride, 25.13 grams of silicon nitride, 0.6 grams of ammonium fluoride, and 1.12 grams of europium oxide;

[0077] Step (2): Fully mix the above raw materials evenly under nitrogen protection with a purity of 99.999%;

[0078] Step (3): Seal the uniformly mixed raw materials into a molybdenum crucible, cover and seal it, and burn it in stages in a nitrogen protective atmosphere with a purity of 99.999% and a pressure of 0.8Mpa: raise the temperature from normal temperature to 1000°C and keep the temperature for 5 hours. Keep the temperature at 1400°C for 5 hours, and finally rise to 1800°C for 8 hours. After cooling to room temperature, take out the red blocky powder;

[0079] Step (4): The red blocky powder is milled with agate balls for 2 hours, and passed...

Embodiment 2

[0083] Example 2Sr 0.868 Ca 0.112 SiAlN 3 Cl 0.100 f 0.030 : Eu 0.02

[0084] Step (1): According to the chemical formula Sr 0.868 Ca 0.112 SiAlN 3 Cl 0.100 f 0.030 : Eu 0.02 The stoichiometric ratio weighs 45.18 grams of strontium nitride, 2.97 grams of calcium nitride, 22.00 grams of aluminum nitride, 25.10 grams of silicon nitride, 0.6 grams of ammonium fluoride, 1.91 grams of ammonium chloride, and 2.24 grams of europium oxide;

[0085] Step (2): Fully mix the above raw materials evenly under nitrogen protection with a purity of 99.999%;

[0086] Step (3): Put the uniformly mixed raw materials into a molybdenum crucible, cover and seal it tightly, and burn in stages in a nitrogen protection atmosphere with a purity of 99.999% and a pressure of 0.9Mpa: raise the temperature from normal temperature to 800°C and burn at a constant temperature for 6 hours , and then raised to 1300°C for 5 hours at a constant temperature, and finally raised to 1800°C for 8.5 hours a...

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Abstract

The invention discloses red fluorescence powder with high color rendering and low light attenuation. The chemical formula of the red fluorescence powder is expressed as (Sr1-m-zMm)SinAlxNyCllFj:Euz. In the formula, M is selected from one or several of Ca, Ba, Li, Na, K and Sc; m is greater than or equal to 0.001 and is less than 1; n is greater than or equal to 0.5 and is less than or equal to 2.5; x is greater than or equal to 0.5 and is less than or equal to 2.5; y is greater than or equal to 1 and is less than or equal to 5; l is greater than or equal to 0.001 and is less than or equal to 1; j is greater than or equal to 0.001 and is less than or equal to 1; z is greater than or equal to 0.001 and is less than or equal to 0.2. The invention also discloses a preparation method of the red fluorescence powder. The method comprises the following steps: weighing the needed raw materials according to a chemical metering ratio of the chemical formula, and fully and uniformly mixing the raw materials in nitrogen protection; firing the uniformly mixed raw materials in stages with high-pressure and high-temperature solid phase in the nitrogen atmosphere; crushing and sieving to obtain powder, and carrying out film-coating treatment on the powder via a CVB method to obtain the red fluorescence powder with high color rendering and low light attenuation. The fluorescence powder has the characteristics of high light emitting efficiency, high color rendering and low light attenuation.

Description

technical field [0001] The invention relates to a red fluorescent powder and a preparation method thereof, in particular to a red fluorescent powder with high color rendering and low light attenuation and a preparation method thereof, in particular to a high color rendering and low light emission excited by visible blue light, purple light and ultraviolet light. A decaying red phosphor and a preparation method thereof, the red phosphor is suitable for backlights of mobile phones, computers, PADs, etc., display lighting and white LEDs. Background technique [0002] With the rapid development of the international IT industry, the relevant backlight, display lighting and white LED industries continue to introduce new ones, and the product size is developing in the direction of diversification and portability. As one of the core components of LCD products, backlight is bound to cooperate with this development trend. Because of the diversification and portability of products. To...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/64C23C16/44C23C16/40H01L33/50
CPCC09K11/025C09K11/7733C23C16/40C23C16/4417H01L33/502Y02B20/00
Inventor 胡程王晶尹向南徐达
Owner DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD
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