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A long afterglow luminescent material and its preparation method

A long afterglow luminescence and selected technology, which is applied in the directions of luminescent materials, chemical instruments and methods, can solve the problems of no long afterglow luminescence in the base material, no patent application for afterglow materials, etc., and achieves high afterglow intensity, improved afterglow performance, Combining simple effects

Inactive Publication Date: 2018-12-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are no literature reports of long afterglow luminescence on matrix materials composed of Ca, Sc, and Zr cations, and there are no patent applications in the field of afterglow materials.

Method used

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  • A long afterglow luminescent material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: 0.99CaO·Sc 2 o 3 0.02ZrO 2 0.01CeO 2 Synthesis of Long Afterglow Materials

[0027] Weigh 1.1104g of CaO, 2.7584g of Sc 2 o 3 , 0.0493g of ZrO 2 and 0.0344 g of CeO 2 , after fully grinding in an agate mortar and mixing evenly, sintering in two steps: first, pre-sintering at a lower temperature of 500°C for 5 hours, cooling to room temperature, taking it out and grinding again and mixing evenly, and sintering at 1200°C for 8 hours under a carbon monoxide atmosphere . The sample is taken out and ground to finally obtain the sample. After being irradiated with ultraviolet light to blue light, the sample emits a strong long afterglow, and about 30 minutes after the excitation stops, the long afterglow luminescence phenomenon of the sample is still visible to the naked eye. The Ce produced in embodiment 1 3+ For the decay curve of afterglow luminescence over time of doped long-lasting luminescent materials figure 1 .

Embodiment 2

[0028] Example 2: 0.56CaO 1.2Sc 2 o 3 0.4ZrO 2 0.03CeO 2 0.02Dy2 o 3 0.002GeO 2 Synthesis of Long Afterglow Materials

[0029] Weigh 1.121g of CaCO 3 , 3.3101g of Sc 2 o 3 , 0.9858g of ZrO 2 , 0.0344g of CeO 2 , Dy of 0.1492g 2 o 3 and 0.0042g of GeO 2 , after fully grinding and mixing in an agate mortar, sintering in two steps: first, pre-sintering at a lower temperature of 800°C for 3h, cooling to room temperature, taking it out and grinding again and mixing evenly, and sintering at 1500°C for 8h under carbon reduction . The sample is taken out and ground, and the sample is finally obtained. After being irradiated with ultraviolet light to blue light, the sample emits a strong long afterglow.

Embodiment 3

[0030] Example 3: 0.5CaO 0.2MgO 0.6SrO 0.1BaO 1.1Sc 2 o 3 0.2ZrO 2 0.02CeO 2 0.01Dy 2 o 3 0.01Nd 2 o 3 0.01Pr 2 o 3 ·0.01Cr 2 o 3 0.01GeO 2 Synthesis of Long Afterglow Materials

[0031] Weigh 1.0009g of CaCO 3 , 0.1612g of MgO, 3.1639g of Sr(C 2 o 4 ) 2 , 0.5226g of Ba(NO 3 ) 2 , 3.0342g of Sc 2 o 3 , 0.4929g of ZrO 2 , 0.0688g of CeO 2 , 0.0746g of Dy 2 o 3 , 0.0673g of Nd 2 o 3 , 0.066g of Pr 2 o 3 , 0.0304g of Cr 2 o 3 and 0.0209 g of GeO 2 ,, after fully grinding and mixing in an agate mortar, sintering in two steps: first, pre-sintering at a lower temperature of 850°C for 2 hours, cooling to room temperature, taking out and grinding again and mixing evenly, in a mixed atmosphere of hydrogen and nitrogen Sinter at 1550°C for 9h. The sample is taken out and ground, and the sample is finally obtained. After being irradiated with ultraviolet light to blue light, the sample emits a strong long afterglow.

[0032] The long afterglow luminescent ...

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Abstract

The invention provides a long-lasting phosphor material and a preparation method thereof and relates to long-lasting phosphor materials. The chemical formula of the long-lasting phosphor material is aMIIO.bSc2O3.cZrO2.dCeO2.eMIII2O3.fMIVO2. MII is selected from at least one of Mg, Ca, Sr, Ba and Zn. MIII is selected from at least one of Y, Lu, La, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Mn, Ga, In, Sb, Bi and Cr. MIV is selected from at least one of Ge, Sn and Ti. A is larger than or equal to 0.5 and smaller than or equal to 1.5, b is larger than or equal to 0.5 and smaller than or equal to 1.2, c is larger than or equal to 0.001 and smaller than or equal to 0.5, d is larger than or equal to 0.001 and smaller than or equal to 0.2, e is larger than or equal to 0 and smaller than or equal to 0.5, and f is larger than or equal to 0 and smaller than or equal to 0.5. Oxides or corresponding salts of all the elements are weighed according to the mole number ratio of a, b, c and d, and grinding is carried out; grinding is carried out after presintering and cooling; after sintering and smashing are carried out, the long-lasting phosphor material is obtained.

Description

technical field [0001] The present invention relates to long afterglow luminescent material, especially relates to 3+ An activated long-lasting luminescent material and a preparation method thereof. Background technique [0002] Long afterglow materials can absorb the energy of external radiation and store it, and can continue to emit light after the irradiation is stopped, so they are widely used in emergency lighting and display, aviation, automotive instrument display panels and other fields. As far as the system of long afterglow materials is concerned, the early traditional long afterglow materials are mainly concentrated in sulfide systems such as ZnS and CaS. This system has disadvantages such as poor stability and easy decomposition, strong hygroscopicity, and weak afterglow luminescence performance. Then the aluminate system was extensively researched and developed, among which SrAl 2 o 4 :Eu 2+ , Dy 3+ Green light long afterglow materials have become the main ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/7766
Inventor 李烨陈继欣周天亮庄逸熙
Owner XIAMEN UNIV
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