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Cu<2+>-doped BaAl2O4 fluorescent powder and preparation method thereof

A technology of phosphor powder and sol-gel method, which is applied in the field of luminescent material preparation and application, can solve the problems of unfavorable barium aluminate luminescence characteristics, etc., and achieve the requirements of less stringent preparation schedule, high output and yield, and simple preparation process Effect

Pending Publication Date: 2021-03-16
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of these ions, it is not conducive to broaden the luminescence characteristics of barium aluminate and apply them

Method used

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  • Cu&lt;2+&gt;-doped BaAl2O4 fluorescent powder and preparation method thereof
  • Cu&lt;2+&gt;-doped BaAl2O4 fluorescent powder and preparation method thereof
  • Cu&lt;2+&gt;-doped BaAl2O4 fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: BaAl 2 o 4 :1 mol% Cu 2+

[0016] Barium nitrate, aluminum nitrate and copper nitrate with a purity greater than 99.9% were weighed as raw materials according to the stoichiometric ratio. First, the raw materials are added to citric acid, the molar ratio of citric acid to metal ions is 1:0.5, and then deionized water with a volume fraction of citric acid of 50% is added to obtain a sol. Then the sol was placed on a magnetic stirrer and heated at 75° C. with constant stirring at 300 rpm to form a gel. Then, the gel was dried at room temperature for 8 hours. Finally, the gel was calcined at 1000° C. for 2 hours, and then ground to obtain the phosphor.

Embodiment 2

[0017] Example 2: BaAl 2 o 4 :0.7mol% Cu 2+

[0018] Barium nitrate, aluminum nitrate and copper nitrate with a purity greater than 99.9% were weighed as raw materials according to the stoichiometric ratio. First, the raw materials were added to citric acid, the molar ratio of citric acid to metal ions was 1:2, and then deionized water with a volume fraction of citric acid of 30% was added to obtain a sol. Then the sol was placed on a magnetic stirrer and heated at 90° C. with constant stirring at 200 rpm to form a gel. Then, the gel was dried at room temperature for 12 hours. Finally, the gel was calcined at 800° C. for 4 hours, and then ground to obtain the phosphor.

Embodiment 3

[0019] Example 3: BaAl 2 o 4 :0.5mol% Cu 2+

[0020] Barium nitrate, aluminum nitrate and copper nitrate with a purity greater than 99.9% were weighed as raw materials according to the stoichiometric ratio. First, the raw materials are added to citric acid, the molar ratio of citric acid to metal ions is 1:1, and then deionized water with a volume fraction of citric acid of 40% is added to obtain a sol. Then the sol was placed on a magnetic stirrer and heated at 80° C. with constant stirring at 250 rpm to form a gel. Then, the gel was dried at room temperature for 10 hours. Finally, the gel was calcined at 900° C. for 3 hours, and then ground to obtain the phosphor.

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Abstract

The invention discloses Cu<2+>-doped BaAl2O4 fluorescent powder and a preparation method thereof, and belongs to the technical field of preparation and application of luminescent materials. The invention provides fluorescent powder. The chemical formula of the fluorescent powder is BaAl2O4:x mol% Cu, wherein x is more than 0 and less than or equal to 1; pure fluorescent powder is prepared by adopting a sol-gel method, and shallow-layer and deep-layer traps exist at the same time due to introduction of Cu<2+>. The fluorescent powder prepared by the invention has blue light emission at 435nm under the excitation of 283nm. The preparation method provided by the invention is simple in process, stable in product performance and suitable for industrial production.

Description

technical field [0001] The invention provides a Cu 2+ Doped BaAl 2 o 4 A fluorescent powder and a preparation method thereof belong to the technical field of preparation and application of luminescent materials. Background technique [0002] Barium aluminate (BaAl 2 o 4 ) Equal long afterglow phosphor materials have attracted much attention due to their potential in light-emitting devices. Afterglow properties are often observed when this material is doped with some rare earth ions. The most common rare earth (RE) ion studied by many researchers is Eu 2+ / 3+ and Dy 3+ . Not just BaAl 2 o 4 Doped with Eu 3+ ion, divalent europium (Eu 2+ ) ions and several other RE ions such as trivalent neodymium (Nd 3+ ), dysprosium (Dy 3+ ) and cerium (Ce 3+ ) is also used as a dopant added to BaAl 2 o 4 in the system. However, due to the limitation of these ions, it is not conducive to broaden the luminescence characteristics of barium aluminate and apply it. Contents of...

Claims

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Application Information

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IPC IPC(8): C09K11/64
CPCC09K11/643
Inventor 张乐甄方正邵岑张永丽申冰磊陈东顺罗泽陈浩
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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