Long-afterglow luminescent material and preparation method thereof

A technology of long afterglow luminescence and carbon monoxide, which is applied in the direction of luminescent materials, chemical instruments and methods, and can solve the problem of lack of long afterglow luminescent materials

Active Publication Date: 2016-07-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

[0004] At present, blue and green long-lasting luminescent materials have become mature (such as the Chinese patent with the publication number of CN104774609A) and have been used in actual production. However, with the expansion of the application field of long-lasting materials, especially for new applications such as AC LEDs The demand for yellow long-lasting luminescent materials that can be excited by blue light is still scarce

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  • Long-afterglow luminescent material and preparation method thereof
  • Long-afterglow luminescent material and preparation method thereof
  • Long-afterglow luminescent material and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a preparation method of the above-mentioned long-lasting luminescent material, comprising: S1) mixing Ln source compound, Re source compound, Al source compound and Ga source compound, and performing one-time roasting under a protective atmosphere to obtain the primary product: S2) The primary product is subjected to secondary firing under a protective atmosphere to obtain a long-lasting luminescent material; wherein, Ln is two of Gd, Y, Lu and La; Re is Tb, Eu, Ce, Nd, Er, One or more of Yb and Bi; the molar ratio of the Ln element in the Ln source compound, the Re element in the Re source compound, the Al element in the Al source compound to the Ga element in the Ga source compound is [(2-x) ×a]: (x×a): [(1-y)×b×2]: (y×b×2); 2≤a≤4, 3≤b≤8, 0.0001≤x≤0.5, 0.31≤ y≤0.99.

[0044] Wherein, the Ln, Re, a, b, x, and y are the same as those described above, and will not be repeated here.

[0045] The Ln source compound is a compound contai...

Embodiment 1

[0058] take Y 2 o 3 (99.9%), Gd 2 o 3 (99.9%), Al 2 o 3 (analytical pure), Ga 2 o 3 (analytical pure), CeO 2 (99.99%) were mixed according to the molar ratio of 1.5:1.461:2:3:0.078, fully ground to obtain a mixture.

[0059] Put the mixture into a corundum crucible, put the above-mentioned corundum crucible with the mixture into a high-temperature furnace, and bake it at 1550°C for 5 hours in the presence of nitrogen, cool it down to room temperature naturally, take it out, crush it and grind it evenly to obtain a powder Primary product: Put the primary product into a corundum crucible, then place it in a high-temperature furnace, and roast it at 900°C for 4 hours in the presence of hydrogen, cool it down to room temperature naturally, take it out, crush it and grind it evenly, and it is the long-lasting luminescent material 3[YGd 0.974 o 3 0.026Ce] 5[0.4Al 2 o 3 0.6Ga 2 o 3 ].

[0060] Carry out X-ray diffraction analysis to the long afterglow luminescent materi...

Embodiment 2

[0063] take Y 2 o 3 (99.9%), Lu 2 o 3 (99.9%), Al 2 o 3 (analytical pure), Ga 2 o 3 (analytical pure), CeO 2 (99.99%) were mixed according to the molar ratio of 1.5:1.461:2:3:0.078, fully ground to obtain a mixture.

[0064] Put the mixture into a corundum crucible, put the above-mentioned corundum crucible with the mixture into a high-temperature furnace, and bake it at 1550°C for 5 hours in the presence of nitrogen, cool it down to room temperature naturally, take it out, crush it and grind it evenly to obtain a powder The initial product: Put the initial product into a corundum crucible, then place it in a high-temperature furnace, and roast it at 900°C for 4 hours in the presence of hydrogen, cool it down to room temperature naturally, take it out, crush it and grind it evenly, and it is the long-lasting luminescent material 3[YLu 0.974 o 3 0.026Ce] 5[0.4Al 2 o 3 0.6Ga 2 o 3 ].

[0065] X-ray diffraction analysis was performed on the long-lasting luminescent ...

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Abstract

The invention provides a long-afterglow luminescent material and a preparation method thereof. The long-afterglow luminescent material is a[Ln[2-x]O3.xRe].b[(1-y)Al2O3.yGa2O3], wherein Ln is two of Gd, Y, Lu and La, and Re is one or more of Tb, Eu, Ce, Nd, Er, Yb and Bi. Compared with the prior art, the long-afterglow luminescent material uses Ln2O3, Al2O3 and Ga2O3 as matrixes and Re as the activator to obtain the long afterglow property; the mole coefficients of the components are changed, so that the luminescent material can be excited by blue light to obtain long afterglow, and the luminescent color of the long afterglow can vary between blue green and orange. The luminescent material has the advantages of long afterglow time, high brightness, high physicochemical stability, no toxicity or harm, no radioactivity and the like, and can not do harm to the human body and environment.

Description

technical field [0001] The invention belongs to the technical field of photoluminescent materials, and in particular relates to a long afterglow luminescent material and a preparation method thereof. Background technique [0002] Long-lasting luminescent material is a material that can store the energy of external light radiation such as ultraviolet light and visible light, and then slowly release the stored energy in the form of visible light at room temperature. The latest research results show that long afterglow materials have important application value in the field of living biological imaging and AC LED. [0003] The long afterglow phenomenon of long afterglow luminescent materials generally originates from crystal defects of the host material, which can be generated by doping. Crystal defects lead to localized energy levels in the forbidden band of the matrix. In the excitation phase, these localized energy levels can trap holes or electrons, and when the excitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7774C09K11/7792
Inventor 李成宇张粟马腾飞庞然姜丽宏
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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