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Vacuum ultraviolet induced high colour purity red phosphor and preparation method thereof

A red phosphor, vacuum ultraviolet technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as insufficient luminous efficiency, and achieve the effects of good chemical stability, low cost, and easy industrialization

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

In order to improve the color purity of red powder, people have made great efforts, such as someone using Y 2 o 3 :Eu 3+ Alternative to (Y,Gd)BO 3 :Eu 3+ , Y 2 o 3 :Eu 3+ The main emission peak is located at 611nm (corresponding to Eu 3+ of 5 D. 0 → 7 f 2 transition), the color purity is better, but its luminous efficiency is insufficient (Y, Gd)BO 3 :Eu 3+ 60% of

Method used

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  • Vacuum ultraviolet induced high colour purity red phosphor and preparation method thereof
  • Vacuum ultraviolet induced high colour purity red phosphor and preparation method thereof
  • Vacuum ultraviolet induced high colour purity red phosphor and preparation method thereof

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preparation example Construction

[0025] The preparation method of above-mentioned red fluorescent powder, comprises the following steps:

[0026] 1), the chemical formula M (1+x) M' (1-2x) BP 2 o 8 :Eu x The composition measurement ratio of the weighed raw materials is ground and mixed, that is, weighed according to the molar ratio of the corresponding elements in the above structural formula. Where 0<x≤0.3, M is one or more of Li, Na, K, and M' is one or more of Ba, Sr, Ca;

[0027] 2), roasting the above-mentioned mixed material at high temperature, and washing the sintered material;

[0028] 3) Separating and filtering the washed materials, and then classifying them according to their particle size;

[0029] 4) After drying the classified materials, red phosphor powder with high color purity can be obtained.

[0030] Wherein, the raw material of the step 1) is Li-containing compound or simple substance, Na-containing compound or simple substance, K-containing compound or simple substance, Ba-contain...

Embodiment 1

[0037] Embodiment 1: composition is Na 1.002 Ba 0.996 BP 2 o 8 :Eu 0.002 red phosphor

[0038] According to chemical formula M (1+x) M' (1-2x) BP 2 o 8 :Eu x Carry out batching, wherein: X=0.002, M is Na, M ' is Ba, then takes by weighing (NH 4 ) 2 HPO 4 、H 3 BO 3 , BaCO 3 、Na 2 CO 3 , Eu 2 o 3 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 centrifugal filtration, and carried out liquid classification, selected powder particles with a particle size of 8-10 microns, and finally baked at 60°C Dry to obtain red phosphor for PDP.

Embodiment 2

[0039] Embodiment 2: composition is K 1.05 Sr 0.9 BP 2 o 8 :Eu 0.05 red phosphor

[0040] According to the chemical formula M (1+x) M' (1-2x) BP 2 o 8 :Eu x Carry out batching, wherein: X=0.05, M is K, M ' is Sr, then takes by weighing (NH 4 ) 2 HPO 4 、H 3 BO 3 , SrCO 3 、K 2 CO 3 , Eu 2 o 3 The raw materials are ground and mixed thoroughly, and then 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, 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 particles with a particle size of 5-7 microns, finally in 100 Dry at ℃ to obtain the red phosphor for PDP.

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Abstract

The invention provides vacuum ultraviolet induced high colour purity red phosphor. The concrete chemical formula of phosphor is as follows: M (1plus x) M' (1 minus 2x) BP208: Eux, 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 Ba, Sr and Ca. The invention also provides a method for preparing the red 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 high colour purity red phosphor having good colour purity and stable chemical property.

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 red component in a three-primary-color fluorescent powder used in a plasma display panel. 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 vacuum ultraviolet rays of 147nm and 172nm, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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