Fluorescent powder for warm white LED and preparation method thereof

A fluorescent powder and warm white light technology, applied in the field of fluorescent powder, can solve the problems of difficult production of warm white fluorescent powder, high sintering temperature, difficult to control, and long cooling time of products, so as to achieve luminous brightness that is not easy to be damaged, product particles are small, Energy Saving Effect

Inactive Publication Date: 2018-11-23
DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the production of warm white phosphor is difficult, the cost is high, the sintering temperature is high and it is difficult to control, and the cooling of the product also takes a long time

Method used

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  • Fluorescent powder for warm white LED and preparation method thereof
  • Fluorescent powder for warm white LED and preparation method thereof
  • Fluorescent powder for warm white LED and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: A kind of fluorescent powder for warm white light LED and preparation method thereof, it is characterized in that, comprise the following steps: S1, select raw material M(NO3)3; S2, add appropriate amount of glycine (NH2CH2COOH) and fully mix and carry out combustion reaction; S3 , put the obtained precursor in a mortar to grind and pulverize; S4, grind the mixture finely and put it into a calciner, place the calciner in a tube furnace, and heat it for calcining; S5, stop heating, cool down, and add MnCO3 , after grinding, then calcining and heating; S6, cooling, and after ball milling, washing and drying, phosphor powder for warm white LEDs is obtained.

[0035] In the above S1, M(NO3)3 is preferably yttrium nitrate, terbium nitrate, aluminum nitrate.

[0036] In said S2, the reaction chemical equation:

[0037] 3M(NO3)3+5NH2CH2COOH→1.5M2O3+7N2+10CO2+12.5H2O,

[0038] 2M(NO3)3→M2O3+6NO2+1.5O2.

[0039] In S4, the temperature of the calciner is 1000°C, ...

Embodiment 2

[0047] Embodiment 2: A kind of fluorescent powder for warm white light LED and preparation method thereof, it is characterized in that, comprises the following steps: S1, select raw material M(NO3)3; S2, add appropriate amount of glycine (NH2CH2COOH) and fully mix and carry out combustion reaction; S3 , put the obtained precursor in a mortar to grind and pulverize; S4, grind the mixture finely and put it into a calciner, place the calciner in a tube furnace, and heat it for calcining; S5, stop heating, cool down, and add MnCO3 , after grinding, then calcining and heating; S6, cooling, and after ball milling, washing and drying, phosphor powder for warm white LEDs is obtained.

[0048] In the above S1, M(NO3)3 is preferably yttrium nitrate, terbium nitrate, aluminum nitrate.

[0049] In said S2, the reaction chemical equation:

[0050] 3M(NO3)3+5NH2CH2COOH→1.5M2O3+7N2+10CO2+12.5H2O,

[0051] 2M(NO3)3→M2O3+6NO2+1.5O2.

[0052] In S4, the temperature of the calciner is 1000-17...

Embodiment 3

[0060] Embodiment 3: A kind of fluorescent powder for warm white light LED and preparation method thereof, it is characterized in that, comprises the following steps: S1, select raw material M(NO3)3; S2, add appropriate amount of glycine (NH2CH2COOH) and fully mix and carry out combustion reaction; S3 , put the obtained precursor in a mortar to grind and pulverize; S4, grind the mixture finely and put it into a calciner, place the calciner in a tube furnace, and heat it for calcining; S5, stop heating, cool down, and add MnCO3 , after grinding, then calcining and heating; S6, cooling, and after ball milling, washing and drying, phosphor powder for warm white LEDs is obtained.

[0061] In the above S1, M(NO3)3 is preferably yttrium nitrate, terbium nitrate, aluminum nitrate.

[0062] In said S2, the reaction chemical equation:

[0063] 3M(NO3)3+5NH2CH2COOH→1.5M2O3+7N2+10CO2+12.5H2O,

[0064] 2M(NO3)3→M2O3+6NO2+1.5O2.

[0065] In S4, the temperature of the calciner is 1000-17...

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Abstract

The invention discloses fluorescent powder for warm white LED and a preparation method thereof. The preparation method is characterized by comprising the following steps of S1, electing raw materialsM(NO3)3; S2, adding a proper amount of NH2CH2COOH for sufficient mixing and combustion reaction; S3, putting obtained precursors into a grinding pot to be ground and crushed; S4, finely grinding the mixture; then, charging the materials into a calcination pot; putting the calcination pot into a tubular furnace; performing calcination heating; S5, stopping heating; lowering the temperature; addingMnCO3; performing grinding; then, performing roasting heating; S6, performing cooling; obtaining the fluorescent powder for warm white LED after ball milling, washing and drying. The method provided by the invention has the advantages that the process is simple; the temperature rise is fast; the product particles are small; the particle diameter distribution is uniform; the purity is high; the luminous intensity cannot be easily damaged; the energy sources are saved; the cost is reduced; the positive divalent manganese ions are provided through MnCO3; the emission peak of Mn<2+> is about 600nm; the spectrum control can be easily controlled; the fluorescent powder for warm white LED can be easily obtained.

Description

technical field [0001] The invention relates to the technical field of fluorescent powder, in particular to a fluorescent powder for warm white LEDs and a preparation method thereof. Background technique [0002] Phosphor powder, commonly known as luminous powder, is usually divided into two types: photo-induced energy storage luminous powder and radioactive luminous powder. Photo-energy storage luminous powder is a fluorescent powder that stores light energy after being irradiated by natural light, daylight, ultraviolet light, etc., and then slowly releases it in the form of fluorescence after stopping the light irradiation, so it can be used at night or in dark places. , can still see the luminescence, which lasts for several hours to more than ten hours. [0003] In real life, people make use of the long-term luminous properties of luminous powder to make weak lighting sources, which are of special use in military departments. This material is applied to various switch s...

Claims

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Application Information

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IPC IPC(8): C09K11/80
CPCC09K11/7787
Inventor 王晶尹向南胡程徐达
Owner DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD
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