Orange long-afterglow luminescent material and preparation method thereof

A long afterglow luminescence, orange technology, applied in the field of long afterglow luminescent materials and their preparation, high brightness long afterglow luminescent materials and their preparation, can solve problems such as hindering practical applications, long afterglow luminescence color changes, etc., and achieve great application value, The effect of long afterglow time and high brightness

Inactive Publication Date: 2016-04-06
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems will inevitably lead to a significant change in the color of the long-lasting luminescence after color mixing over time, hindering its practical application.

Method used

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  • Orange long-afterglow luminescent material and preparation method thereof
  • Orange long-afterglow luminescent material and preparation method thereof
  • Orange long-afterglow luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of orange long afterglow luminescent material (Ca 0.999 ) 4 Nb 2 O 9 : Pr 0.001 :

[0038] (1) Weigh the raw materials according to Table 1. The above raw materials are all analytically pure, put in an agate mortar, add 30g of absolute ethanol, grind for 3 hours, and then dry in an oven at 60°C;

[0039] (2) Place the dried mixed powder in an alumina crucible and pre-fire at 850°C for 4 hours in an air atmosphere;

[0040] (3) Calcining the ground calcined powder at 1300°C for 4 hours in an air atmosphere;

[0041] (4) Grind the cooled product into powder to obtain a chemical composition of (Ca 0.999 ) 4 Nb 2 O 9 : Pr 0.001 Orange long afterglow luminescent material.

[0042] The orange long afterglow luminescent material prepared in this example has a white appearance, and the X-ray powder diffraction (XRD) test results are as follows figure 1 As shown, the diffraction peak data of the obtained product is compared with Ca 4 Nb 2 O 9 The diffraction data of the powder...

Embodiment 2

[0044] Preparation of orange long afterglow luminescent material (Ca 0.998 ) 4 Nb 2 O 9 : Pr 0.002 :

[0045] (1) Weigh the raw materials according to Table 1. The above raw materials are all analytically pure, put in an agate mortar, add 30g of absolute ethanol, grind for 2 hours, and then dry in an oven at 60°C;

[0046] (2) Place the dried mixed powder in an alumina crucible and pre-fire at 900°C for 4 hours in an air atmosphere;

[0047] (3) Calcining the ground calcined powder at 1400°C for 4 hours in an air atmosphere;

[0048] (4) Grind the cooled product into powder to obtain a chemical composition of (Ca 0.998 ) 4 Nb 2 O 9 : Pr 0.002 Orange long afterglow luminescent material.

Embodiment 3

[0050] Preparation of orange long afterglow luminescent material (Ca 0.997 ) 4 Nb 2 O 9 : Pr 0.003 :

[0051] (1) Weigh the raw materials according to Table 1. The above raw materials are all analytically pure, put into an agate mortar, add 35g deionized water and grind for 2.5 hours, then dry in an oven at 70°C;

[0052] (2) Place the dried mixed powder in an alumina crucible and pre-fire at 950°C for 5 hours in an air atmosphere;

[0053] (3) Calcining the ground calcined powder at 1450°C for 5 hours in an air atmosphere;

[0054] (4) Grind the cooled product into powder to obtain a chemical composition of (Ca 0.997 ) 4 Nb 2 O 9 : Pr 0.003 Orange long afterglow luminescent material.

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Abstract

The invention relates to an orange long-afterglow luminescent material and a preparation method thereof. The material takes Ca4Nb2O9 as a matrix and takes Pr<3+> as an activating agent, the expression formula of the material is [(Ca(1-x)Mx)(1-z)]4Nb2O9:(Pr(1-y)Ry)z, x is larger than or equal to 0 and smaller than or equal to 0.2, y is larger than or equal to 0 and smaller than or equal to 0.5, z is larger than 0 and smaller than or equal to 0.1, and M represents a Ca-site substitute element and is one or more of Mg, Sr and Ba; R represents a rare earth or transition metal element and is one or more of La, Nd, Sm, Eu, Gd, Yb, Lu, Cr and Mn; x, y and z represent molar content. The material is synthesized in the air with a high-temperature solid phase method. After excitation by ultraviolet light or daily light, the material has a remarkable orange long-afterglow characteristic, and people can watch afterglow for more than 10 minutes with naked eyes in a dark place. The orange long-afterglow luminescent material and the preparation method have the advantages as follows: (1) the preparation method is simple and easy to operate, and the reducing atmosphere is not required; (2) the material has stable physicochemical properties, high brightness and long afterglow time; (3) the matrix elements of the material are all elements rich on the earth, no physical harm or environmental pollution is caused during production and use of the material, and the material belongs to an environment-friendly material.

Description

Technical field [0001] The invention relates to a long-lasting luminescent material and a preparation method thereof, in particular to a high-brightness long-lasting luminescent material that can emit orange light when excited by ultraviolet light or sunlight and a preparation method thereof, and belongs to the technical field of luminescent materials. Background technique [0002] Long afterglow luminescent material is a type of light-induced energy storage material, which can absorb and store external light energy and emit visible light in the dark. It has the advantages of safety, pollution-free, energy saving, and recyclable use. It is widely used in emergency instructions and low light. Related researches in lighting, architectural decoration, arts and crafts, information storage, high-energy ray detection and other fields have gradually attracted people's attention. [0003] The existing long-lasting luminescent materials in the visible light region are mainly divided into bl...

Claims

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Application Information

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IPC IPC(8): C09K11/67
CPCC09K11/7746C09K11/7768C09K11/7786
Inventor 张君诚龙云泽辛星范新华潘聪张红娣孙彬刘燕杰
Owner QINGDAO UNIV
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