Vacuum ultraviolet induced green emitting phosphor and preparation method thereof

A technology of green fluorescent powder and vacuum ultraviolet light, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of low luminous brightness, achieve high luminous intensity, easy industrialization, and low cost

Inactive Publication Date: 2014-01-29
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of Mn 2+ As an activator, this type of green phosphor still has a long afterglow time, and the luminous brightness of this type of phosphor is also low

Method used

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  • Vacuum ultraviolet induced green emitting phosphor and preparation method thereof
  • Vacuum ultraviolet induced green emitting phosphor and preparation method thereof
  • Vacuum ultraviolet induced green emitting phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: composition is Mg 2.96 BPO 7 :Tb 0.02 , Li 0.02 green phosphor

[0038] According to the chemical formula M 3-2x BPO 7 :Tb x , R x , carry out batching, wherein x=0.02, M is Mg, R is Li, weighs then by the stoichiometric ratio of above-mentioned chemical formula (NH 4 ) 2 HPO 4 、H 3 BO 3 , Li 2 CO 3 , MgO, Tb 4 o 7 The raw materials are ground and mixed thoroughly, and then sintered in an air atmosphere at 400°C for 24 hours, taken out and mixed evenly, and then sintered in a reducing atmosphere at 800°C (volume ratio N 2 / H 2 =95:5) and sintered for 24 hours, cooled naturally to room temperature, took out and ground, washed with deionized water, carried out liquid classification after centrifugal filtration, selected powder particles with a particle size of 8-10 microns, and finally baked at 60°C Dry to get green phosphor for PDP.

[0039] Such as figure 1 , figure 2 As shown, the green fluorescent powder of this embodiment has strong...

Embodiment 2

[0040] Embodiment 2: composition is Zn 2.9 BPO 7 :Tb 0.005 , Li 0.005 green phosphor

[0041] According to the chemical formula M 3-2x BPO 7 :Tb x , R x , carry out batching, wherein x=0.005, M is Zn, R is Li, weighs then by the stoichiometric ratio of above-mentioned chemical formula (NH 4 ) 2 HPO 4 、H 3 BO 3 , ZnO, Li 2 CO 3 , Tb 4 o 7 After the raw materials are ground and mixed thoroughly, they are first sintered in an air atmosphere at 600°C for 20 hours, taken out and mixed evenly, and then sintered in a reducing atmosphere at 700°C (volume ratio N 2 / H 2 =95:5) and sintered for 18 hours, naturally cooled to room temperature, took out and ground, washed with deionized water, carried out liquid classification after carrying out Buchner funnel suction filtration, and selected the powder particles with a particle size of 5-7 microns, finally at 100 The green fluorescent powder for PDP was obtained by drying at ℃.

Embodiment 3

[0042] Embodiment 3: composition is Ca 2.8 BPO 7 :Tb 0.1 , K 0.1 green phosphor

[0043] According to the chemical formula M 3-2x BPO 7 :Tb x , R x , carry out batching, wherein x=0.005, M is Ca, R is K, weighs then by the stoichiometric ratio of above-mentioned chemical formula (NH 4 ) 2 HPO 4 、H 3 BO 3 , CaCO 3 、K 2 CO 3 , Tb 4 o 7 The raw materials are ground and mixed thoroughly, and then sintered in an air atmosphere at 800°C for 18 hours, taken out and mixed evenly, and then sintered in a reducing atmosphere at 800°C (volume ratio N 2 / H 2 =95:5) and sintered for 15 hours, cooled naturally to room temperature, taken out and ground, washed with deionized water, carried out centrifugal filtration, and then carried out liquid classification, selected particles with a particle size of 4-6 microns, and finally baked at 120°C Dry to get green phosphor for PDP.

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Abstract

The invention provides vacuum ultraviolet induced green emitting phosphor which is characterized by having the following concrete chemical formula: M3 minus 2xBPO7: Tbx, Rx, wherein x is more than 0 and less than or equal to 0.3, R is one or several of Li, Na and K, and M is one or several of Mg, Zn, Ca, Sr and Ba. The invention also provides a method for preparing the green emitting phosphor, comprising the following steps: firstly, weighing corresponding raw materials according to the weight ratio expressed in the chemical formula; secondly, carrying out high-temperature roasting on the raw materials and rinsing coasted materials; and thirdly, carrying out separation, filtration, size grading and drying on the rinsed materials to obtain the vacuum ultraviolet induced green emitting phosphor having stable chemical property, short after time and excellent luminance.

Description

technical field [0001] The invention relates to a fluorescent powder excited by vacuum ultraviolet light and a preparation method thereof, in particular to a green fluorescent powder excited by vacuum ultraviolet light that can be used in light-emitting devices and a manufacturing method thereof. Background technique [0002] At present, in the fierce market competition, the traditional cathode ray tube display has gradually declined, and it has been replaced by the flat panel display which is famous for its thin and light body, no X-ray radiation, and low power consumption. Among them, the display effect of plasma flat panel display is particularly outstanding, with the advantages of high contrast, good color reproduction, rich gray scale and fast response speed, etc., occupying an absolute advantage in the global large-screen TV market. The light emitting principle of the plasma display panel is to use inert gas such as Xe or Xe-He to discharge into a plasma state, radiate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/70C09K11/71
Inventor 周明杰廖秋荣田梓峰刘军梁小芳
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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