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Praseodymium-doped laminated perovskite type red long-lasting phosphor material as well as preparation method and application thereof

A long-lasting luminescent, perovskite-type technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as unfavorable application promotion, easy deliquescent, harsh synthesis conditions, etc., achieve good physical and chemical stability, excellent red color Afterglow performance, the effect of simple preparation process

Inactive Publication Date: 2017-12-22
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents 200910026093.4 and 201210597523.X disclose a Y 2 o 2 S: Eu 3+ , Ti 4+ , Mg 2+ Red long afterglow luminescent material, its emission wavelength is around 625nm, and the afterglow time can reach 3.5 hours, but it is easy to volatilize S element that pollutes the environment during the synthesis process, and at the same time, its chemical stability is poor, it is very easy to deliquescence, and after decomposition Produces toxic gas, these disadvantages limit its wide application
The chemical stability of the nitrogen (oxygen) oxide system is good, and it is non-toxic, but its synthesis conditions are very harsh, and it needs to be synthesized in a high-vacuum and high-pressure environment. The cost is very expensive, and it is not conducive to its application and promotion.

Method used

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  • Praseodymium-doped laminated perovskite type red long-lasting phosphor material as well as preparation method and application thereof
  • Praseodymium-doped laminated perovskite type red long-lasting phosphor material as well as preparation method and application thereof
  • Praseodymium-doped laminated perovskite type red long-lasting phosphor material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a praseodymium-doped layered perovskite-type red long-lasting luminescent material, comprising the following steps:

[0033]1) The analytically pure powder raw materials CaO, TiO 2 、Pr 6 o 11 、Dy 2 o 3 、K 2 CO 3 Press Ca 2+ : Ti 4+ : Pr 3+ : Dy 3+ :K + = 3.975: 3: 0.005: 0.01: 0.01 molar ratio weighing and mixing, and placed in an agate mortar;

[0034] 2) Add 5ml of ethanol to the mixed raw materials in the agate mortar, and grind for 30 minutes;

[0035] 3) Put the ground mixed raw material in a square crucible, put it into a box furnace, heat it to 1300°C, and keep it warm for 2 hours to make it undergo a solid phase reaction;

[0036] 4) After the box-type furnace is cooled, grind the mixed raw materials and pass through a mesh sieve.

[0037] Such as figure 1 As shown, according to the X-ray analysis results, the obtained luminescent material is pure phase Ca 4 Ti 3 o 10 . Such as figure 2 As shown, the excitation and emis...

Embodiment 2

[0039] A method for preparing a praseodymium-doped layered perovskite-type red long-lasting luminescent material, comprising the following steps:

[0040] 1) The analytically pure powder raw materials SrO, TiO 2 、Pr 6 o 11 、Tm 2 o 3 , ZnO by Sr 2+ : Ti 4+ : Pr 3+ : Tm 3+ : Zn 2+ = 3.97: 3: 0.005: 0.01: 0.015 molar ratio weighing and mixing, and placed in an agate mortar;

[0041] 2) Add 6ml of ethanol to the mixed raw materials in the agate mortar, and grind for 60 minutes;

[0042] 3) Put the ground mixed raw material in a square crucible, put it into a box furnace, heat it to 1400°C, and keep it warm for 4 hours to make it undergo a solid phase reaction;

[0043] 4) After the box-type furnace is cooled, grind the mixed raw materials and pass through a mesh sieve.

[0044] According to the X-ray analysis results, the obtained luminescent material is pure phase Sr 4 Ti 3 o 10 . Under excitation at 330 nm, the sample showed bright red emission; after the excitati...

Embodiment 3

[0046] A method for preparing a praseodymium-doped layered perovskite-type red long-lasting luminescent material, comprising the following steps:

[0047] 1) The analytically pure powder raw materials MgO, TiO 2 、Pr 6 o 11 , Yb 2 o 3 , Ga 2 o 3 by Mg 2+ : Ti 4+ : Pr 3+ : Yb 3+ : Ga 3+ = 3.965: 3: 0.005: 0.01: 0.02 Weigh and mix in molar ratio, and place in agate mortar;

[0048] 2) Add 9ml of ethanol to the mixed raw materials in the agate mortar, and grind for 120 minutes;

[0049] 3) Put the ground mixed raw material in a square crucible, put it into a box furnace, heat it to 1500°C, and keep it warm for 6 hours to make it undergo a solid phase reaction;

[0050] 4) After the box-type furnace is cooled, grind the mixed raw materials and pass through a mesh sieve.

[0051] According to the X-ray analysis results, the obtained luminescent material is pure phase Mg 4 Ti 3 o 10 . Under excitation at 330 nm, the sample showed bright red emission; after the excita...

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Abstract

The invention discloses a praseodymium-doped laminated perovskite type red long-lasting phosphor material and relates to the field of solid light emitting materials. The chemical formula of the material is M4-x-y-zTi3O10:xPr<3+>, yRe<3+>, zA<3+>, in the formula, x is greater than or equal to 0.005 and less than or equal to 0.05, y is greater than or equal to 0 and less than or equal to 0.03, z is greater than or equal to 0 and less than or equal to 0.03, M is one or more elements of Mg, Ca, Sr and Ba, Re is one element of Y, Dy, Lu, Ho, Tm and Yb, and A is one or two elements of Li, Na, K, Zn, B, Al, Ge, Ga, Zr and In. The invention further provides a preparation method of the praseodymium-doped laminated perovskite type red long-lasting phosphor material. The invention further provides application of the praseodymium-doped laminated perovskite type red long-lasting phosphor material. The praseodymium-doped laminated perovskite type red long-lasting phosphor material is low in cost and stable in chemical property.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a praseodymium-doped layered perovskite type red long-lasting luminescent material, a preparation method and an application thereof. Background technique [0002] Long afterglow luminescent material is a new type of energy-saving and environmentally friendly material, which can store part of the energy absorbed by sunlight or fluorescent lamps, and slowly release the energy in the form of visible light. This feature makes this type of material widely used in the field of lighting, indication and decorative lamps. In recent years, its application has gradually expanded to high-tech fields such as information storage, radiation detection and imaging display. [0003] Since MatsuzawaT reported SrAl 2 o 4 : Eu 2+ , Dy 3+ After the phenomenon of ultra-long afterglow luminescence, rare earth doped long afterglow materials have aroused great interest. From the perspectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
CPCC09K11/7769
Inventor 王波李小双曾庆光
Owner WUYI UNIV
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