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Strontium aluminate luminescent material with hollow structure and preparation method

A technology of luminescent material and hollow structure, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of inconsistent powder particle size, inferior luminous intensity of fluorescent powder, high energy consumption in high temperature reaction, etc. The effect of low cost and few process steps

Active Publication Date: 2014-10-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Most of the current commercial luminescent materials are prepared by high-temperature solid-phase method. The high-temperature reaction consumes a lot of energy and the particle distribution is uneven. And the particle size of the powder is inconsistent, the shape is incomplete, resulting in uneven coating
People prepare phosphors by using sol-gel method, hydrothermal synthesis method, complex gel method and other methods. These methods can make up for the deficiency of high-temperature solid-phase synthesis method, but the luminous intensity of phosphor powder obtained by these methods is not as high as high temperature solid phase synthesis

Method used

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  • Strontium aluminate luminescent material with hollow structure and preparation method

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Effect test

Embodiment 1

[0027] Preparation of Hollow Spherical Sr by Precipitation Method 0.995 al 2 o 4 :Eu 0.005 :

[0028] Weigh 4g of glucose and dissolve it in absolute ethanol to make the solution volume 40mL, then transfer the solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover and tighten it, and react at 120°C for 36h to prepare carbon The bead solution was washed several times with deionized water and absolute ethanol, centrifuged, and dried at 60°C to obtain carbon bead C coated with metal nanoparticles for use;

[0029] Take by weighing 10.3619g SrO and dissolve in nitric acid to obtain 100mL1mol / L of Sr(NO 3 ) 2 solution; weigh 5.0980g Al 2 o 3 Dissolved in nitric acid to obtain 100mL1mol / L Al(NO 3 ) 3 solution; weigh 0.1760g Eu 2 o 3 Dissolved in nitric acid to obtain 100mL0.01mol / L Eu(NO 3 ) 3 solution. According to Sr 0.995 al 2 o 4 :Eu 0.005 The stoichiometric ratio pipettes 3.98mL1mol / L Sr(NO 3 ) 2 , 8mL1mol / L Al(NO 3 ) 3 and 2mL0.0...

Embodiment 2

[0032] Preparation of Hollow Spherical Sr by Precipitation Method 0.8 al 2 o 4 :Eu 0.2 :

[0033] Weigh 0.003g of glucose and dissolve it in absolute ethanol to obtain 40mL of glucitol solution, transfer this solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover and tighten it, and react at 150°C for 10h to prepare carbon The bead solution was centrifuged to obtain a solid phase, washed twice with deionized water and absolute ethanol, and dried at 70°C to obtain carbon bead C.

[0034] According to Sr 0.8 al 2 o 4 :Eu 0.2 The stoichiometric ratio pipettes 6.4mL0.5mol / L Sr(CH 3 COO) 2 solution, 16mL0.5mol / L Al(CH 3 COO) 3 solution and 1.6mL0.5mol / L Eu(CH 3 COO) 3 solution, placed in a 100mL beaker to form a mixed solution, then weighed 1.2 mg of carbon pellets C and added to the mixed solution, and stirred evenly. Under magnetic stirring, add the above mixed solution dropwise into 25mL precipitant oxalic acid solution (0.8mol / L), and the...

Embodiment 3

[0037] Preparation of Hollow Spherical Sr by Precipitation Method 0.99 al 2 o 4 :Eu 0.01 :

[0038] Weigh 5g of glucose and dissolve it in absolute ethanol to obtain 40mL of glucitol solution, transfer this solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover it and tighten it, and react at 180°C for 24h to prepare carbon small The solution of the spheres was centrifuged to obtain a solid phase, washed twice with deionized water and absolute ethanol, and dried at 60°C to obtain carbon spheres C.

[0039] According to Sr 0.99 al 2 o 4 :Eu 0.01 The stoichiometric ratio pipettes 3.96mL1mol / L Sr(NO 3 ) 2 solution, 8mL1mol / L Al(NO 3 ) 3 solution and 0.4mL0.1mol / L Eu(NO 3 ) 3 solution, placed in a 100mL beaker to form a nitric acid mixture, then weighed 240 mg of carbon pellets C and added to the mixture, and stirred evenly. Under magnetic stirring, the above mixed solution was added dropwise to 40mL precipitant oxalic acid solution (0.5mol / ...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a strontium aluminate luminescent material with a hollow structure and a preparation method. The chemical general formula of the luminescent material is Sr4-xAl2O4:Eux, wherein 0<x<=0.2. According to the strontium aluminate luminescent material with the hollow structure, dispersed carbon small spheres C are taken as a template, and the obtained strontium aluminate luminescent material has a spherical hollow structure, is controllable in morphology, is capable of effectively reducing usage amount of rare earth metals and reducing production cost, and helps to greatly save precious rare earth resource.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a hollow structure strontium aluminate luminescent material and a preparation method. Background technique [0002] Most of the current commercial luminescent materials are prepared by high-temperature solid-phase method. The high-temperature reaction consumes a lot of energy and the particle distribution is uneven. And the particle size of the powder is inconsistent, and the shape is incomplete, resulting in uneven coating. People prepare phosphors by using sol-gel method, hydrothermal synthesis method, complex gel method and other methods. These methods can make up for the deficiency of high-temperature solid-phase synthesis method, but the luminous intensity of phosphor powder obtained by these methods is not as high as high temperature Solid Phase Synthesis. Obtaining luminescent materials with controllable size and shape and good luminescent performance is the goal tha...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD