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Green emitting phosphor for plasma display panel and preparation method thereof

A green fluorescent powder and display panel technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of low luminous brightness and achieve high luminous intensity, easy industrialization, and short afterglow time

Inactive Publication Date: 2011-07-27
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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  • Green emitting phosphor for plasma display panel and preparation method thereof
  • Green emitting phosphor for plasma display panel and preparation method thereof
  • Green emitting phosphor for plasma display panel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: composition is K 1.05 Sr 0.9 BP 2 o 8 :Tb0.05 green phosphor

[0038] According to the chemical formula M (1+x) M' (1-2x) BP 2 o 8 :Tb x Carry out batching, wherein x=0.05, M is K, and M ' is Li, then takes by weighing (NH 4 ) 2 HPO 4 、H 3 BO 3 , SrCO 3 、K 2 CO 3 , Tb 4 o 7 After the raw materials are fully ground and mixed, they are first 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 prepared in this embodiment has strong absorption at 147nm and...

Embodiment 2

[0040] Embodiment 2: composition is Na 1.002 Ba 0.996 BP 2 o 8 :Tb 0.002 green phosphor

[0041] According to the chemical formula M (1+x) M' (1-2x) BP 2 o 8 :Tb x Carry out batching, wherein x=0.002, M is Na, and M ' is Ba, weighs then by the stoichiometric ratio of above-mentioned chemical formula (NH 4 ) 2 HPO 4 、H 3 BO 3 、BaCO 3 、Na 2 CO 3 , Tb 4 o 7 After the raw materials are fully ground and mixed, 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 800°C (volume ratio N 2 / H 2 =95:5) and sintered for 18 hours, cooled naturally 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 60 The green fluorescent powder for PDP was obtained by drying at ℃.

Embodiment 3

[0042] Embodiment 3: composition is Li 1.3 Ca 0.4 BP 2 o 8 :Tb 0.3 green phosphor

[0043] According to the chemical formula M (1+x) M' (1-2x) BP 2 o 8 :Tb x Carry out batching, wherein x=0.3, M is Li, M ' is Ca, then weighs (NH 4 ) 2 HPO 4 、H 3 BO 3 , CaCO 3 , Li 2 CO 3 , Tb 4 o 7 After the raw materials are fully ground and mixed, they are first sintered in an air atmosphere at 800°C for 18 hours, taken out and mixed evenly, and then sintered in a reducing atmosphere at 850°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 100 ° C Dry to get green phosphor for PDP.

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Abstract

The invention provides green emitting phosphor for a plasma display panel. The concrete chemical formula of the green emitting phosphor is as follows: M (1plus x) M' (1 minus 2x) BP208: Tbx, wherein x is more than 0 and less than or equal to 0.3, M is one or several of Li, Na and K, and the M' is one or several of 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 greenemitting 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 among three primary color fluorescent powders used in a plasma display panel and a preparation 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 va...

Claims

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Application Information

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IPC IPC(8): C09K11/71
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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