Method for improving luminescent property of aluminate long-lasting phosphor material

A technology with long afterglow luminescence and luminescence performance, applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effect of simple synthesis process, strong operability and low equipment requirements

Inactive Publication Date: 2018-11-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

to SiO 2 Coated SrAl 2 o 4 :Eu 2+ , Dy 3+ The surface modification of long-lasting luminescent materials by depositing noble metals can improve their luminescent performance, but there is no report on related research so far

Method used

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  • Method for improving luminescent property of aluminate long-lasting phosphor material
  • Method for improving luminescent property of aluminate long-lasting phosphor material
  • Method for improving luminescent property of aluminate long-lasting phosphor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1, the SrAl 2 o 4 : Eu 2+ , Dy 3+ Pour the luminescent powder into the alcohol, so that the alcohol submerges the luminescent powder, sonicate in the ultrasonic instrument for 5 minutes, filter after the ultrasonic is completed, and dry in an oven at 100°C for 15 minutes;

[0037] Step 2, weigh the luminescent powder obtained in step 1 into a beaker, put the luminescent powder in absolute ethanol and stir evenly, wherein the mass ratio of luminescent powder to absolute ethanol is 1:1; then add tetraethyl orthosilicate solution 2mL, add 0.2mL of 1mol / L dilute nitric acid dropwise, stir for 30min, slowly add ammonia diluted with absolute ethanol dropwise to adjust the pH to 7, and stir until the solution is in a gel state. The obtained gel was dried in an oven at 60°C for 14 hours, and ground to obtain a silica-coated luminescent material;

[0038] Step 3, silver nitrate is dissolved in alcohol to form a homogeneous solution, wherein the molar concentration of si...

Embodiment 2

[0046] Step 1, the SrAl 2 o 4 : Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in an ultrasonic instrument for 7 minutes, filter after the ultrasonic is completed, and dry in an oven at 115°C for 18 minutes;

[0047] Step 2, weigh the luminescent powder obtained in step 1 into a beaker, put the luminescent powder in absolute ethanol and stir evenly, wherein the mass ratio of luminescent powder to absolute ethanol is 1:1.5; then add tetraethyl orthosilicate solution 3mL, add 0.3mL of 1mol / L dilute nitric acid dropwise, stir for 35min, slowly add ammonia water diluted with absolute ethanol dropwise to adjust the pH value to 7.5 and stir until the solution is in a gel state. The obtained gel was dried in an oven at 70°C for 10 hours, and ground to obtain a silica-coated luminescent material;

[0048] Step 3, silver nitrate is dissolved in alcohol to form a uniform solution, wherein the molar concentration...

Embodiment 3

[0053] Step 1, the SrAl 2 o 4 : Eu 2+ , Dy 3+ Pour the luminescent powder into alcohol, so that the alcohol submerges the luminescent powder, sonicate in the ultrasonic instrument for 8 minutes, filter after the ultrasonic is completed, and dry in an oven at 100°C for 20 minutes;

[0054] Step 2, weigh the luminescent powder obtained in step 1 into a beaker, place the luminescent powder in absolute ethanol and stir evenly, wherein the mass ratio of the luminescent powder to absolute ethanol is 1:2.5; then add tetraethyl orthosilicate Solution 3mL, dropwise add 0.3mL of 1mol / L dilute nitric acid, stir for 45min, slowly add dropwise ammonia water diluted with absolute ethanol to adjust the pH value to 8, stir until the solution is in a gel state. The obtained gel was dried in an oven at 60°C for 13 hours, and ground to obtain a silica-coated luminescent material;

[0055] Step 3, silver nitrate is dissolved in alcohol to form a homogeneous solution, wherein the molar concent...

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Abstract

The invention discloses a method for improving the luminescent property of an aluminate long-lasting phosphor material. The method comprises the following steps: firstly, coating the surface of SrAl2O4: Eu<2+>, Dy3<+> luminescent powder with a layer of SiO2 by adopting a sol-gel method, then adsorbing a layer of silver particles on the surface to obtain a surface silver-loaded SiO2-coated SrAl2O4:Eu<2+>, Dy<3+> long-lasting phosphor material. The method improves the long-lasting phosphor luminescent property and is simple in synthesis process and convenient for industrial large-scale production, and the prepared material is relatively high in long-lasting phosphor luminescent property and expected to produce good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a method for improving the luminous performance of aluminate long-lasting luminescent materials. Background technique [0002] Long afterglow luminescent materials can store energy after absorbing natural light, lighting and other light sources, and continue to emit light, so as to realize electroless luminescence. It is an important energy-saving and environmentally friendly material. Vigorously developing long-lasting luminescent materials is a scientific and technological force for sustainable development in my country, and it is also an important direction for the development of new rare earth materials. New long-lasting luminescent materials will make outstanding contributions to today's energy-saving and environmental protection themes. [0003] SrAl 2 o 4 :Eu 2+ , Dy 3+ Long afterglow luminescent materials have the advantages of excellent lumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/64
CPCC09K11/025C09K11/7792
Inventor 海鸥陈铭慧武秀兰任强胡沁雪郭啸天
Owner SHAANXI UNIV OF SCI & TECH
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