A kind of silicate-based multicolor long afterglow luminescent material and preparation method thereof

A long afterglow luminescence, silicate technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of inconsistent afterglow brightness and decay rate, different physical and chemical properties of multi-substrates, influence of afterglow color, etc., and achieve long afterglow time , high afterglow brightness, simple preparation method

Active Publication Date: 2016-06-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies in the above-mentioned prior art and to solve the problem that the different physical and chemical properties of multi-substrates, the inconsistency of afterglow brightness and attenuation rate will affect the synthesized afterglow color, the purpose of the present invention is to provide a high-brightness, afterglow time Alkaline-earth silicate single-matrix multicolor long-lasting luminescent material with good long-lasting and chemical stability and preparation method thereof

Method used

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  • A kind of silicate-based multicolor long afterglow luminescent material and preparation method thereof
  • A kind of silicate-based multicolor long afterglow luminescent material and preparation method thereof
  • A kind of silicate-based multicolor long afterglow luminescent material and preparation method thereof

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Effect test

Embodiment 1

[0035] Accurately weigh the raw material CaCO according to the molar ratio 3 (analytical pure), SiO 2 (analytical pure) and CeO 2 (analytical pure), the corresponding molar ratio is 3:2:0.01, and then weigh the H with a mass fraction of 10%. 3 BO 3 (analytical pure), grind and mix the weighed raw materials evenly, put them in a corundum crucible, then put them into a high-temperature tube furnace, keep them warm in the air at 1300°C for 6 hours, cool naturally to room temperature, and re- Grind evenly, then put it into a high-temperature tube furnace, keep it warm for 6 hours in a reducing atmosphere (the reducing atmosphere is a mixture of hydrogen and nitrogen, wherein the volume ratio of hydrogen and nitrogen is 10:90) at 1300 ° C, and finally cool naturally to At room temperature, grind again to obtain a solid powder product. After testing its luminescence spectrum, under the excitation of 325nm light, it produces a blue broadband emission. The sample showed a long bl...

Embodiment 2

[0037] Accurately weigh the raw material CaCO according to the molar ratio 3 (analytical pure), SiO 2 (analytical pure) and CeO 2(analytical pure), the corresponding molar ratio is 3:2:0.02, and then weigh the H with a mass fraction of 10%. 3 BO 3 (analytical pure), grind and mix the weighed raw materials evenly, put them in a corundum crucible, put them into a high-temperature tube furnace, keep them warm in the air at 1300°C for 6 hours, cool them naturally to room temperature, and re- Grind it evenly, then put it into a high-temperature tube furnace, keep it in a reducing atmosphere (the volume ratio of hydrogen to nitrogen is 5:95) at 1300°C for 8 hours, and finally cool it naturally to room temperature, and grind it again to obtain a solid powder product. After testing its luminescence spectrum, under the excitation of 325nm light, it produces a blue broadband emission. The sample showed a long blue afterglow after the 254nm UV excitation stopped.

Embodiment 3

[0039] Accurately weigh the raw material CaCO according to the molar ratio 3 (analytical pure), SiO 2 (analytical pure) and CeO 2 (analytical pure), the corresponding molar ratio is 3:2:0.03, and then weigh the H with a mass fraction of 10%. 3 BO 3 (analytical pure), grind and mix the weighed raw materials evenly, put them in a corundum crucible, put them into a high-temperature tube furnace, keep them warm in the air at 1300°C for 6 hours, cool them naturally to room temperature, and re- Grind it evenly, then put it into a high-temperature tube furnace, keep it in a reducing atmosphere (the volume ratio of hydrogen to nitrogen is 8:92) at 1300°C for 6 hours, and finally cool it naturally to room temperature, and grind it again to obtain a solid powder product. After testing its luminescence spectrum, under the excitation of 325nm light, it produces a blue broadband emission, such as figure 1 shown. The sample showed a long blue afterglow after the 254nm UV excitation sto...

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Abstract

The invention discloses silicate-based multi-color long-afterglow luminescent materials and a preparation method thereof. The silicate-based multi-color long-afterglow luminescent materials have the chemical structural expression of Ca3-x-ySiO7:xCe<3+>,yM, wherein x is the doping amount of Ce<3+>, y is the doping amount of M, M is Tb<3+> or Mn<2+>, 0<x<=0.1, and 0<=y<=0.3; H3BO3 with the mass fraction of 5-10% is used as a fluxing agent. The preparation method comprises the steps: synthesizing by adopting a high temperature solid state method in a reducing atmosphere; accurately weighing the raw materials according to the stoichiometric ratio, then mixing and grinding evenly, pre-sintering in air, then grinding again, calcining under a high-temperature reducing atmosphere, and when naturally cooling to the room temperature, grinding to obtain the multi-color long-afterglow luminescent materials. Different samples are excited by ultraviolet light, and the samples emit bright afterglow with different colors. The silicate-based multi-color long-afterglow luminescent materials have the advantages that the silicate-based multi-color long-afterglow luminescent materials have the advantages of no radioactivity, high brightness, good stability, and longer afterglow time; multi-color long afterglow is achieved in a single matrix, the raw materials are cheap and easy to get, and the preparation method is simple and practicable and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a silicate-based multicolor long-lasting luminescent material and a preparation method thereof. technical background [0002] Long afterglow luminescent material is a kind of functional material that can absorb external light energy, store light energy and release it in the form of light after the excitation is stopped. It is also called luminous material or light storage material. It can be widely used in emergency signs and instructions, low-light lighting, decoration, luminous paint, instrumentation, high-energy detection, pharmacology, diagnostics and other fields. [0003] People's early research is mainly on sulfide long afterglow materials. The patent "Sulphide Long Afterglow Luminescent Materials and Manufacturing Method" (application number: 97111381.5) discloses a series of sulfide MS:Eu red long afterglow luminescent materials, but the afterglow brightness is not h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59
Inventor 胡义华金亚洪
Owner GUANGDONG UNIV OF TECH
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