Color-adjustable long-afterglow material and preparation method thereof

A long afterglow material and color technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of short afterglow time and energy loss, and achieve the effects of long afterglow time, high afterglow brightness and good stability

Active Publication Date: 2018-06-01
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method often causes energy loss in the process of transmission, resulting in a shorter afterglow time

Method used

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  • Color-adjustable long-afterglow material and preparation method thereof
  • Color-adjustable long-afterglow material and preparation method thereof
  • Color-adjustable long-afterglow material and preparation method thereof

Examples

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preparation example Construction

[0043] The present invention also provides a preparation method of a long afterglow material with adjustable color, comprising the following steps:

[0044] A) grinding and mixing calcium-containing compounds, strontium-containing compounds, gallium-containing compounds, aluminum-containing compounds and manganese-containing compounds according to the stoichiometric ratio shown in formula I to obtain a mixture;

[0045] Ca x Sr 1-x Ga y Al 4-y o 7 :zMn 2+ Formula I;

[0046] Among them, 0≤x≤1, 0≤y≤4, 0

[0047] B) Calcining the mixture to obtain the long afterglow material with adjustable color shown in formula I.

[0048] In the present invention, the calcium-containing compound is preferably one or more of calcium carbonate, calcium nitrate and calcium oxalate; more preferably calcium carbonate;

[0049] The strontium-containing compound is preferably one or more of strontium carbonate, strontium nitrate and strontium oxalate; more preferably strontium carbo...

Embodiment 1

[0057] Accurately weigh the raw material CaCO according to the molar ratio 3 (analytical pure), Ga 2 o 3 (analytical pure) and MnO 2 (Analytical pure), the corresponding molar ratio is 2:4:0.004. After grinding and mixing the weighed raw materials evenly, put them in a corundum crucible, then put them into a high-temperature tube furnace, and keep them warm in the air at 1200°C After 4 hours, it was naturally cooled to room temperature to obtain a solid powder product. After testing its luminescence spectrum, under the excitation of 250nm light, it produces an orange broadband emission. The sample showed an orange afterglow for up to 11 hours after 250nm UV excitation was stopped. The emission spectrum of the product obtained in this example is as figure 1 As shown, the afterglow attenuation diagram of the obtained product is shown in figure 2 shown.

Embodiment 2

[0059] Accurately weigh the raw material CaCO according to the molar ratio 3 (analytical pure), Ga 2 o 3 (analytical pure) and MnO 2 (Analytical pure), the corresponding molar ratio is 2:4:0.01. After grinding and mixing the weighed raw materials evenly, put them in a corundum crucible, then put them into a high-temperature tube furnace, and keep them warm in the air at 1200°C After 4 hours, it was naturally cooled to room temperature to obtain a solid powder product. After testing its luminescence spectrum, under the excitation of 250nm light, it produces an orange broadband emission. The sample shows a long orange afterglow after the excitation of 250nm ultraviolet light is stopped, such as image 3 shown.

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Abstract

The invention provides a color-adjustable long-afterglow material. The long-afterglow material has the chemical formula shown in formula I: CaxSr(1-x)GayAl(4-y)O7:zMn<2+>, wherein x is larger than orequal to 0 and smaller than or equal to 1, y is larger than or equal to 0 and smaller than or equal to 4, and z is larger than 0 and smaller than or equal to 0.04. The long-afterglow material can realize color adjustment finally by changing part of components of single doping ions in single matrix. The long-afterglow material has higher afterglow brightness and long afterglow time. Afterglow in various colors can be obtained through blending of the matrix while doping elements are not changed in the experiment. Meanwhile, a preparation method of the long-afterglow material is simple, raw materials are cheap and easy to obtain, and the stability of the material is good. The invention also provides the preparation method of the color-adjustable long-afterglow material.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a long afterglow material with adjustable color and a preparation method thereof. Background technique [0002] Long afterglow luminescence is a photoluminescence phenomenon, which refers to the phenomenon that a substance can continue to emit light after the excitation light stops being irradiated. Long afterglow luminescent materials are referred to as long afterglow materials, also known as luminous materials. It is a kind of substance that absorbs the light produced by the sun or artificial light source and emits visible light, and can continue to emit light after the excitation stops. It has the characteristics of using sunlight or light to store light, and glowing at night or in the dark. It is a kind of energy storage and energy-saving luminescent material. Long afterglow materials do not consume electricity, but can store the absorbed natural l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62C09K11/64
CPCC09K11/625C09K11/643
Inventor 金亚洪郑伟鑫胡义华骆顾平吕洋
Owner GUANGDONG UNIV OF TECH
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