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Yellow green afterglow material and preparation method thereof

A yellow-green, afterglow technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unusable, harmful to the body, short afterglow time, etc., and achieve the effects of stable luminescence, superior luminescence performance, and avoiding damage

Pending Publication Date: 2022-02-11
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the biggest problem at present is that most of these high-energy excitation light sources are harmful to the human body and cannot be used on a large scale in public places
It can be seen that the traditional long afterglow materials, the excitation conditions of high-energy light sources largely limit the practical application of afterglow materials
[0003] At present, the blue and green long afterglow materials on the market have become mature and have been used in commercial production, but the long afterglow fluorescent materials with excellent afterglow performance have not yet achieved breakthrough development
The afterglow time of the existing yellow-green afterglow fluorescent materials is generally relatively short, which is far less than the actual afterglow time, which cannot meet the actual production and application requirements. It is urgent to develop a new yellow-green afterglow luminescent material excited by sunlight.

Method used

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  • Yellow green afterglow material and preparation method thereof
  • Yellow green afterglow material and preparation method thereof
  • Yellow green afterglow material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A yellow-green afterglow material, the chemical expression of the afterglow material is: Ca 1.985 MgSi 2 o 7 :0.005Eu 2+ 、0.01Dy 3+ , including the following preparation steps:

[0039] Step 1, weigh CaCO respectively according to the stoichiometric ratio 3 , MgCO 3 , SiO 2 、Eu 2 o 3 、Dy 2 o 3 ;

[0040] Step 2. Mix the weighed raw materials and place them in a ball mill tank, add absolute ethanol to three-quarters of the tank volume, close the lid tightly and place in a ball mill for 4-8 milling at a speed of 600 rpm. hours, take it out and place it in a drying oven, and air-dry it at 120°C for 6 hours to obtain a white precursor;

[0041] Step 3, place the precursor in a corundum crucible, 2 / H 2 Calcined at 1400°C for 6h in an atmosphere of 9 / 1;

[0042] Step 4. Put the calcined yellow-green sample in a ball mill jar and mill it in a ball mill at a speed of 600 rpm for 30 minutes to obtain a yellow-green long afterglow material. After being irradiated ...

Embodiment 2

[0046] A yellow-green afterglow material, the chemical expression of the afterglow material is: Ca 1.985 MgSi 2 o 7 :0.005Eu 2+ 、0.01Dy 3+ , including the following preparation steps:

[0047] Step 1, weigh CaCO respectively according to the stoichiometric ratio 3 , MgCO 3 , SiO 2 、Eu 2 o 3 、Dy 2 o 3 ;

[0048] Step 2. Mix the weighed raw materials and place them in a ball mill tank and add absolute ethanol to three-quarters of the tank volume. Close the lid and place it in a ball mill. Mill at a speed of 600 rpm for 4 -8 hours, take it out, place it in a drying oven, and air-dry it at 120°C for 6 hours to obtain a white precursor;

[0049] Step 3, place the precursor in a corundum crucible, 2 / H 2 Calcined at 1300°C for 8 hours in an atmosphere of 9 / 1;

[0050] Step 4. Put the calcined yellow-green sample in a ball mill jar and mill it in a ball mill for 30 min at a speed of 600 rpm to obtain a yellow-green long afterglow material. After being irradiated by sun...

Embodiment 3

[0053] A yellow-green afterglow material, the chemical expression of the afterglow material is: Ca 1.985 MgSi 2 o 7 :0.005Eu 2+ 、0.01Dy 3+ , including the following preparation steps:

[0054] Step 1, weigh CaCO respectively according to the stoichiometric ratio 3 , MgCO 3 , SiO 2 、Eu 2 o 3 、Dy 2 o 3 ;

[0055] Step 2. Mix the weighed raw materials and place them in a ball mill tank and add absolute ethanol to three-quarters of the tank volume. Close the lid and place it in a ball mill. Mill at a speed of 600 rpm for 4 -8 hours, take it out, place it in a drying oven, and air-dry it at 120°C for 6 hours to obtain a white precursor;

[0056] Step 3, place the precursor in a corundum crucible, 2 / H 2 Calcination at 1200°C for 12h in an atmosphere of 9 / 1;

[0057] Step 4. Put the calcined yellow-green sample in a ball mill jar and mill it in a ball mill at a speed of 600 rpm for 30 minutes to obtain a yellow-green long afterglow material. After being irradiated by ...

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Abstract

The invention discloses a yellow green afterglow material and a preparation method thereof, and relates to the field of inorganic functional materials. The general chemical formula of the yellow green afterglow material is Ca2-x-yMgSi2O7: xEu<2+>, yDy<3+>, x is equal to 0.005 to 0.015, and y is equal to 0.01 to 0.08; the preparation method comprises the following steps: weighing oxide or metal salt raw materials of corresponding elements according to the chemical composition in the chemical general formula of the afterglow material; mixing the weighed raw materials, carrying out ball milling treatment, and drying to obtain a precursor; and calcining the precursor in an atmosphere environment, and carrying out ball milling again to obtain the afterglow material. Rare earth ions Eu<2+> and Dy<3+> are used as luminescence centers and can be excited by sunlight, damage to a human body is avoided, so that large-scale application is met, and the yellow-green afterglow material is good in luminescence stability and long in afterglow luminescence time and can be applied to the aspects of coatings or commodity marks and the like.

Description

technical field [0001] The invention relates to the field of inorganic functional materials, in particular to a yellow-green afterglow material and a preparation method thereof. Background technique [0002] Long afterglow material, as an environmentally friendly energy storage material, has received extensive attention due to its diverse applications in various industries. Traditional long afterglow materials generally require excitation by a high-energy light source, such as ultraviolet light, X-rays or γ-rays, and then absorb and store energy. When the excitation light source is turned off, the energy is released in the form of light and lasts for a period of time (usually tens of minutes or even hours), so the afterglow properties of its long afterglow materials can be applied to some emergency warning signs, weak Lighting, building flaw detection, intracellular imaging in biomedicine and many other fields. But the biggest problem at present is that most of these high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
CPCC09K11/77922
Inventor 周永言孙东伟唐念黎晓淀张曼君
Owner GUANGDONG POWER GRID CO LTD
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