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Light-emitting-adjustable silicate fluorescent powder and preparation method thereof

A fluorescent powder and silicate technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of luminous efficiency and color reproduction performance, different forward voltage and light output, and large color temperature differences between modules, etc., to achieve good Chemical and thermal stability and luminous intensity, luminous color adjustable, simple manufacturing process

Inactive Publication Date: 2021-03-23
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems of color reabsorption and ratio control among the three-color phosphors, which greatly affect the luminous efficiency and color reproduction performance; multi-chip LEDs can theoretically obtain white LEDs with any color temperature and high color rendering, but The forward voltage and light output of multi-chip LEDs are different, the requirements for circuit design are high, the color temperature difference between modules is large, and the technology for UV LED phosphors is not yet mature.
[0007] There is no information about NaGd in the existing literature 9 (SiO 4 ) 6 o 2 :xBi 3+ ,yEu 3+ (x=0.01-0.06, y=0.01-0.09) Phosphor powder report

Method used

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  • Light-emitting-adjustable silicate fluorescent powder and preparation method thereof
  • Light-emitting-adjustable silicate fluorescent powder and preparation method thereof
  • Light-emitting-adjustable silicate fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A Silicate Phosphor NaGd with Tunable Luminescence 9 (SiO 4 ) 6 o 2 :0.02Bi 3+ ,0.05Eu 3+ The preparation, its steps are as follows:

[0033] 1) Weigh the solid Na respectively 2 CO 3 0.5mol, Gd 2 o 3 4.5mol, SiO 2 6mol, Bi 2 o 3 0.01mol, Eu 2 o 3 0.025mol;

[0034] 2) Put the weighed drug into an agate mortar, add 3 mL of absolute ethanol and grind for 15 minutes to mix the drug evenly to obtain mixture A;

[0035]3) Put the mixture A prepared in step 2) into an alumina crucible (25mm×25mm×30mm), and dry it in a drying oven at 55°C for 20 minutes;

[0036] 4) Put the mixture A prepared in step 3) in a high-temperature box-type resistance furnace, raise the temperature from room temperature to 500°C at a rate of 5°C / min, keep it warm for 20 minutes, and then increase the temperature at a rate of 5°C / min To 1300°C, keep warm for 6h, then cool down to room temperature with the furnace;

[0037] 5) Put the substance reacted in step 4) in a mortar and g...

Embodiment 2

[0039] A Silicate Phosphor NaGd with Tunable Luminescence 9 (SiO 4 ) 6 o 2 :0.02Bi 3+ ,0.05Eu 3+ The preparation, its steps are as follows:

[0040] 1) Weigh the solid Na respectively 2 CO 3 0.5mol, Gd 2 o 3 4.5mol, SiO 2 6mol, Bi 2 o 3 0.01mol, Eu 2 o 3 0.025mol;

[0041] 2) Put the weighed drug into an agate mortar, add 3 mL of absolute ethanol and grind for 15 minutes to mix the drug evenly to obtain mixture A;

[0042] 3) Put the mixture A prepared in step 2) into an alumina crucible (25mm×25mm×30mm), and dry it in a drying oven at 60°C for 15 minutes;

[0043] 4) Put the mixture A prepared in step 3) in a high-temperature box-type resistance furnace, raise the temperature from room temperature to 500°C at a rate of 5°C / min, keep it warm for 20 minutes, and then increase the temperature at a rate of 5°C / min To 1350°C, keep warm for 6h, then cool down to room temperature with the furnace;

[0044] 5) Put the substance reacted in step 4) in a mortar and ...

Embodiment 3

[0046] A Silicate Phosphor NaGd with Tunable Luminescence 9 (SiO 4 ) 6 o 2 :0.02Bi 3+ ,0.05Eu 3+ The preparation, its steps are as follows:

[0047] 1) Weigh the solid Na respectively 2 CO 3 0.5mol, Gd 2 o 3 4.5mol, SiO 2 6mol, Bi 2 o 3 0.01mol, Eu 2 o 3 0.025mol;

[0048] 2) Put the weighed drug into an agate mortar, add 3mL of absolute ethanol and grind for 20 minutes to mix the drug evenly to obtain mixture A;

[0049] 3) Put the mixture A prepared in step 2) into an alumina crucible (25mm×25mm×30mm), and dry it in a drying oven at 55°C for 20 minutes;

[0050] 4) Put the mixture A prepared in step 3) in a high-temperature box-type resistance furnace, raise the temperature from room temperature to 500°C at a rate of 5°C / min, keep it warm for 20 minutes, and then increase the temperature at a rate of 5°C / min To 1400°C, keep warm for 5h, then cool down to room temperature with the furnace;

[0051] 5) Put the substance reacted in step 4) in a mortar and g...

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Abstract

The invention discloses light-emitting-adjustable silicate fluorescent powder and a preparation method thereof. According to the preparation method, Na2CO3, Gd2O3, SiO2, Bi2O3 and Eu2O3 are used as raw materials and are subjected to grinding, drying, heat preservation and calcination to finally prepare the silicate fluorescent powder, wherein the chemical general formula of the silicate fluorescent powder is NaGd9(SiO4)6O2: xBi<3+>, yEu<3+> (wherein x is in a range of 0.01-0.06 and y is in a range of 0.01-0.09). The change of the luminous intensity and the luminous color of the fluorescent powder can be easily realized by regulating and controlling an ion doping proportion, and the fluorescent powder has potential application value in the field of near ultraviolet excited white light LEDs.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a silicate fluorescent powder with adjustable luminescence and a preparation method thereof. Background technique [0002] Against the backdrop of global energy shortages, energy conservation and environmental protection have already become one of the main concepts at present. Among them, in the field of luminous lighting, white light-emitting diodes (WLEDs), as the fourth-generation lighting source, have the advantages of low cost, high brightness, long life, and no pollution, and are the best substitutes for light sources such as incandescent lamps and fluorescent lamps. White LEDs have a wide range of applications and high potential research value in indoor and outdoor lighting, display panels, billboard lights, street lights, tunnel lights and other fields. [0003] At present, there are three ways to obtain white LEDs for mainstream commercializ...

Claims

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Application Information

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IPC IPC(8): C09K11/79
CPCC09K11/7792
Inventor 程年才赖亦晴周江聪
Owner FUZHOU UNIVERSITY
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