Manganese ion-activated red long-afterglow luminescent material and preparation method thereof

A technology of long afterglow luminescence and manganese ions, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effects of good performance, simple preparation method, and stable chemical properties of products

Inactive Publication Date: 2012-10-10
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a commonly used ceramic material, aluminum nitride (AlN) has good electrical insulation and thermal conductivity, and high c...

Method used

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  • Manganese ion-activated red long-afterglow luminescent material and preparation method thereof
  • Manganese ion-activated red long-afterglow luminescent material and preparation method thereof
  • Manganese ion-activated red long-afterglow luminescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 1.6231 g of analytically pure aluminum nitride (AlN), and analyze pure manganese carbonate (MnCO 3 )0.0460 g, where Mn 2+ The doping concentration of ions is 0.1% (molar percentage). After fully wet grinding in an agate mortar, put it into a boron nitride crucible, compact it, cover it, put the crucible into a high-temperature furnace, heat it to 1700°C, and keep the temperature constant for 1-3 hours. Cool to room temperature with the furnace to obtain a near-white powder. Through XRD identification, the product is aluminum nitride pure phase, figure 1 Shown is the XRD pattern of the obtained sample. The emission spectrum includes a broad band from 570nm to 700nm. After being irradiated with 254 nm ultraviolet light for 1 minute, the luminescent material exhibits obvious red long afterglow emission, and the afterglow time is about 0.5 hours.

Embodiment 2

[0022] Weigh 1.5985 g of analytically pure aluminum nitride (AlN), and analyze pure manganese carbonate (MnCO 3 ) 0.1150 g, where Mn 2+ The doping concentration of ions is 2.5% (molar percentage). After fully wet grinding in an agate mortar, put it into a boron nitride crucible, compact it, cover it, put the crucible into a high-temperature furnace, heat it to 1750°C, and keep the temperature constant for 3 hours. Cool to room temperature with the furnace to obtain a near-white powder. According to XRD identification, the product is a pure phase of aluminum nitride, the emission spectrum includes a wide band from 570 nm to 700 nm, and the half-peak width is 43 nm. After being irradiated with 254 nm ultraviolet light for 1 minute, the luminescent material exhibits strong red light with long afterglow emission, and the afterglow time is about 2 hours. figure 2 are the excitation and emission spectra of the sample. Under the irradiation of ultraviolet light, the measured lum...

Embodiment 3

[0024] Weigh 1.4756 g of analytically pure aluminum nitride (AlN), and analyze pure manganese carbonate (MnCO 3 ) 0.4598 g, where Mn 2+ The doping concentration of ions is 10%. After fully wet grinding in an agate mortar, put it into a boron nitride crucible, compact it, cover it, put the crucible into a high-temperature furnace, heat it to 1700°C, and keep the temperature constant for 3 hours. The body color of the obtained powder sample after cooling with the furnace is off-white. According to XRD identification, the main phase of the product is aluminum nitride, and contains a small amount of Al 2 o 3 , the emission spectrum includes a broad band from 570 nm to 700 nm. After being irradiated with 254 nm ultraviolet light for 1 minute, the luminescent material exhibits obvious long afterglow emission of red light, and the afterglow time is about 20 minutes.

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Abstract

The invention discloses a manganese ion-activated red long-afterglow luminescent material and a preparation method thereof, and belongs to the technical field of long-afterglow luminescent materials. The long-afterglow luminescent material comprises two components, namely AlN:Mn<2+>, wherein AlN is a matrix, and Mn<2+> is an activation ion. The preparation method of the material comprises the following steps of: based on aluminum nitride and manganese carbonate as raw materials, fully mixing the raw materials and placing into a boron nitride crucible; covering the boron nitride crucible; firing under the nitrogen atmosphere; and cooling to prepare the manganese ion-activated red long-afterglow luminescent material. The preparation method is simple to operate; and the prepared long-afterglow luminescent material is good in performance, and the afterglow time can continuously last for more than 2 hours in the dark environment. The long-afterglow luminescent material is low in production cost, stable in chemical property of the product, fluffy and easy to grind, and is free of radioactivity; and therefore, the harm to the environment can be avoided.

Description

technical field [0001] The invention relates to a long afterglow luminescent material, in particular to a novel red light emitting long afterglow luminescent material activated by manganese ions and a preparation method thereof. Background technique [0002] As an important low-light lighting material, long-lasting luminescent materials, that is, light-storing luminescent materials, have many advantages such as no special external field, environmental friendliness, no radioactivity, excellent weather resistance, and energy saving. They have great potential in solar energy conversion and utilization. Huge application potential. Since the discovery of Eu in 1996 2+ Since the activated alkaline earth aluminates have excellent long-lasting luminescent properties, scientists at home and abroad have done a lot of work on the research and application of this kind of materials, which has become a research hotspot. At present, the production process of blue and green long-lasting l...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 雷炳富张浩然刘应亮刘晓瑭郑明涛肖勇
Owner SOUTH CHINA AGRI UNIV
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