Orange-red long afterglow Luminescent Material

A long afterglow luminescence, orange-red technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of waste gas human body and environmental hazards, complex production process, difficult to meet needs and other problems, achieve non-radioactive, simple preparation method, reduce effect of miscellaneous

Inactive Publication Date: 2009-10-28
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the 1990s, people have successively invented rare earth ion-doped aluminate system and silicate system long-lasting luminescent materials. The long afterglow materials of the sulfide system have been improved, but the luminescent colors of these two types of luminescent materials are generally green, supercolor, blue-green, etc., which are difficult to meet the needs
Although the afterglow performance of this long afterglow material is good, the product and its preparation method have the following disadvantages and shortcomings: sulfur is used as a raw material, and the waste gas produced is very harmful to the human body and the environment; the production process is protected by a reducing atmosphere, The production process is complicated and the production cost is high; the flux used is Na 2 CO 3 and Li 2 CO 3 higher cost
Except these deficiencies, the raw material price of prior art is high, especially contains expensive rare earth europium, makes the cost height of product

Method used

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  • Orange-red long afterglow Luminescent Material
  • Orange-red long afterglow Luminescent Material
  • Orange-red long afterglow Luminescent Material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] According to the chemical formula Ca 2 SnO 4 :Sm 0.01 , accurately weigh the oxide or carbonate of the corresponding element and 2-3% H 3 BO 3 , pour the above raw materials into an agate mortar, then add absolute ethanol or acetone as a dispersant according to 3~6ml / (gram raw material), after fully grinding and mixing, transfer to a corundum crucible, in an air atmosphere, at 1100 ~ Sinter at 1300°C for 3-6 hours, cool to room temperature, take out the sample and grind it again, keep it at 800-1200°C for 1-4h, cool to room temperature, take out the sample and grind to obtain the example material. The material is white in appearance, and XRD test shows that the main phase is Ca 2 SnO 4 . The excitation spectrum of this material is composed of a series of peaks in the range of 320-575nm, the strongest peak is located at 408nm, and other peaks are located at 348, 364, 378, 478 and 560nm. figure 1 . The emission spectrum of this material has 3 strong peaks, the str...

Embodiment 2

[0043] According to the chemical formula Ca 2 SnO 4 :Sm 0.01 , accurately weigh the oxide or carbonate of the corresponding element and the weight of the raw material 0.5-3% H 3 BO 3 and 0.5-3% NH 4 Cl, pour the above materials into an agate mortar, then add absolute ethanol or acetone as a dispersant at 3 to 6ml / (gram of raw material), fully grind and mix, then transfer to a corundum crucible, and in an air atmosphere, at 1100 ~ Sinter at 1300°C for 3-6 hours, cool to room temperature, take out the sample and grind it again, keep it at 800-1200°C for 1-4h, cool to room temperature, take out the sample and grind to obtain the example material. attached Figure 4 The XRD patterns of the products prepared under different conditions are given. The material is white in appearance, and XRD test shows that the main phase is Ca 2 SnO 4 , see attached Figure 4-4 . The excitation spectrum of this material is composed of a series of peaks in the range of 320-575nm, the strong...

Embodiment 3

[0045] According to the chemical formula Ca 2 SnO 4 :Sm 0.01 , accurately weigh the oxide or carbonate of the corresponding element and the raw material weight 1~3%H 3 BO 3 and 0.5-3% NH 4 Cl, pour the above materials into an agate mortar, then add absolute ethanol or acetone as a dispersant at 3 to 6ml / (gram of raw material), fully grind and mix, then transfer to a corundum crucible, and in an air atmosphere, at 1100 ~ Sinter at 1300°C for 3-6 hours, cool to room temperature, take out the sample and grind it again, keep it at 800-1200°C for 1-4h, cool to room temperature, take out the sample and grind to obtain the example material. The material is white in appearance, and XRD test shows that the main phase is Ca 2 SnO 4 . The excitation spectrum of this material consists of a series of peaks in the range 320-575nm, with the strongest peak at 408nm and other peaks at 348, 364, 378, 478 and 560nm, see attached Figure 8 . The emission spectrum of this material has 3 s...

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PUM

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Abstract

The present invention relates to a luminescent Material which can send out orange-red light through the inspiration of ultraviolet light or sunlight and has long afterglow, and a method for preparing the material. The luminescent material of the invention is an orange-red long afterglow luminescent material with a general formula of Ca(2-x-y)SnO4:Smx,My, wherein M is zinc or cadmium or the combination of zinc and cadmium; x and y are the molar ratio coefficients of corresponding doped ions relatively to the Ca2SnO4, wherein, x=0.001-0.150, and y=0-0.150. The preparing method of the luminescent material according to the invention adopts a high-temperature solid phase method.

Description

technical field [0001] The invention relates to a luminescent material which can emit orange-red light and has a long afterglow after being excited by ultraviolet light or sunlight, and a preparation method of the material. Background technique [0002] Long-lasting luminescent material is a kind of photoluminescent material, which can absorb the energy of external light and store the energy. After the excitation light source is turned off, the stored energy is slowly released in the form of visible light at room temperature. It has the advantages of no pollution, safety, energy saving and economy. Since the 1990s, people have successively invented rare earth ion-doped aluminate system and silicate system long-lasting luminescent materials. The long afterglow materials of the sulfide system have been improved, but the luminescent colors of these two types of luminescent materials are generally green, chromatic, blue-green, etc., which are difficult to meet the needs. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
Inventor 刘伟生巨正花魏瑞平
Owner LANZHOU UNIVERSITY
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