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Orange long-afterglow fluorescent powder with low color temperature, and preparation method thereof

A long-lasting phosphor and low color temperature technology, which is applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of low color temperature, easy deliquescence, low luminous brightness, etc.

Pending Publication Date: 2021-07-06
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main research of red long afterglow materials is Eu 2+ Sulfide system as an activator, but its luminous brightness is low, the afterglow time is short, and it is easy to deliquescence
There are reports of rare earth ion-activated alkaline earth metal titanates and sulfur oxide series red long-lasting luminescent materials, but orange long-lasting luminescent materials with low color temperature and wide spectrum have not been reported yet.

Method used

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  • Orange long-afterglow fluorescent powder with low color temperature, and preparation method thereof
  • Orange long-afterglow fluorescent powder with low color temperature, and preparation method thereof
  • Orange long-afterglow fluorescent powder with low color temperature, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the low color temperature orange long afterglow phosphor of the present embodiment, chemical formula is Ba 0.94 Sr 0.05 Ga 2 o 4 :0.01Bi 3+ ;

[0027] The preparation method of the orange long-lasting phosphor with low color temperature, the specific steps are as follows:

[0028] (1) Weigh Ba 2 CO 3 (Analytical pure) 0.6183g, SrCO 3 (Analytical pure) 0.0246g, Ga 2 o 3 (Analytical pure) 0.6248g, Bi 2 o 3 (99.99%) 0.0077g; then add 3g of ethanol, and fully grind for 0.3h with an agate mortar to obtain a mixed powder;

[0029] (2) Calcining the mixed powder in step (1) at a temperature of 1200° C. in an air atmosphere for 8 hours, cooling to room temperature, and grinding to obtain an orange long-lasting phosphor with a low color temperature;

[0030] In this embodiment BaGa 2 o 4 The crystal structure diagram of the matrix is ​​shown in figure 1 , Ba 0.94 Sr 0.05 Ga 2 o 4 :0.01Bi 3+ The XRD pattern of phosphor powder is shown in figure...

Embodiment 2

[0036] Embodiment 2: the low color temperature orange long afterglow phosphor of the present embodiment, chemical formula is Ba 0.95-x-y Sr 0.05 Ga 2 o 4 :xBi 3+ +yNd 3+ , where x=0.01, y=0.01;

[0037] The preparation method of the orange long-lasting phosphor with low color temperature, the specific steps are as follows:

[0038] (1) Weigh Ba 2 CO 3 (Analytical pure) 0.6118g, SrCO 3 (Analytical pure) 0.0246g, Ga 2 o 3 (Analytical pure) 0.6248g, Bi 2 o 3 (99.99%) 0.0077g, Nd 2 o 3 (99.99%) 0.0056g; then add 5g of ethanol, and fully grind for 0.5h with an agate mortar to obtain a mixed powder;

[0039] (2) Calcining the mixed powder in step (1) at a temperature of 1100° C. in an air atmosphere for 10 hours, cooling to room temperature, and grinding to obtain an orange long-lasting phosphor with a low color temperature;

[0040] The emission peaks of the fluorescent powder in this embodiment have strong emission at 500nm and 630nm, which comes from Bi 3+ Ionic ...

Embodiment 3

[0041] Embodiment 3: the low color temperature orange long afterglow phosphor of the present embodiment, chemical formula is Ba 0.95-x-y Sr 0.05 Ga 2 o 4 :xBi 3+ +yTm 3+ , where x=0.01, y=0.01;

[0042] The preparation method of the orange long-lasting phosphor with low color temperature, the specific steps are as follows:

[0043] (1) Weigh Ba 2 CO 3 (Analytical pure) 0.6118g, SrCO 3 (Analytical pure) 0.0246g, Ga 2 o 3 (Analytical pure) 0.6248g, Bi 2 o 3 (99.99%) 0.0077g, Tm 2 o 3 (99.99%) 0.0064g; then add 6g of ethanol, and fully grind for 0.8h with an agate mortar to obtain a mixed powder;

[0044] (2) Calcining the mixed powder in step (1) at a temperature of 1300° C. in an air atmosphere for 6 hours, cooling to room temperature, and grinding to obtain an orange long-lasting phosphor with a low color temperature;

[0045] The emission peaks of the fluorescent powder in this embodiment have strong emission at 500nm and 630nm, which comes from Bi 3+ Ionic 3...

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Abstract

The invention discloses an orange long-afterglow fluorescent powder with low color temperature, and a preparation method thereof, and belongs to the technical field of rare earth luminescent materials. The orange long afterglow fluorescent powder with low color temperature has a chemical formula of Ba0.95-x-ySr0. 05Ga2O4: xBi<3+>, yR<3+>, x is greater than 0 and less than or equal to 0.15, y is greater than or equal to 0 and less than or equal to 0.15, and R is one or more of Nd<3+>, Tm<3+> and Ho<3+>. The fluorescent powder disclosed by the invention is good in chemical stability and high in thermal stability, has orange long-afterglow luminescence capability, can be applied to the aspects of night emergency indication, optoelectronic devices, element or instrument display, luminescent ceramics, luminescent plastic plates or films, paints or coatings with various purposes and the like and can also be used in many high-tech fields such as optical recording, information storage, anti-counterfeiting systems and the like.

Description

technical field [0001] The invention relates to an orange long-lasting phosphor with low color temperature and a preparation method thereof, belonging to the technical field of rare earth luminescent materials. Background technique [0002] Long afterglow luminescent material is also called light storage material, which is a kind of photoluminescent material. Under the excitation of the light source, this material can emit visible light, store part of the obtained light energy, and release the energy slowly in the form of light after the excitation stops. Because it can use sunlight or light energy storage to emit light in the dark, it is widely used in night emergency instructions, optoelectronic devices or components, instrument displays, low-level lighting, home decoration, national defense and military, etc. It is more expected to be used in information processing, The fields of new energy, life science and cutting-edge science and technology will affect the development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62
CPCC09K11/74
Inventor 余雪王少卿王婷王清远冯威李子洋郭龙超赵峰
Owner CHENGDU UNIV
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