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Method for preparing efficient red small-particle fluorescent powder

A fluorescent powder and small particle technology, applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of reduced luminous efficiency of phosphors, no particle shape, no way to control, etc., to improve the shape and size, Short afterglow time and excellent luminous performance

Inactive Publication Date: 2004-09-15
CHOW TAI SENG JEWELRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphors obtained by these methods exhibit greatly reduced luminous efficiencies with little or no control over particle morphology

Method used

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  • Method for preparing efficient red small-particle fluorescent powder
  • Method for preparing efficient red small-particle fluorescent powder
  • Method for preparing efficient red small-particle fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] (1) Accurately weigh 3.9748gY 2 o 3 (99.99%) and 0.6046gEu 2 o 3 (99.99%), the Y 2 o 3 and Eu 2 o 3 Put in a container, add 100ml 1:1 HNO to the container 3 , heating and stirring until boiling, and boiling for 5-10 minutes, so that the rare earth oxide is fully dissolved, and solution A is obtained;

[0029] (2) Accurately weigh 3.6977g diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 (A.R.), add 50ml of distilled water, stir with a glass rod at room temperature to fully dissolve, and obtain solution B;

[0030] (3) Accurately weigh 1.4038g ammonium metavanadate NH 4 VO 3 (A.R.), add 50ml of distilled water and 1.9264g of oxalic acid, stir with a glass rod at room temperature to fully dissolve, and obtain solution C;

[0031] (4) Accurately weigh the organic precursor ethylenediaminetetraacetic acid ([CH 2 N(CH 2 COOH) 2 ] 2 )32.732g, add 200ml distilled water and 50ml NH 3 .H 2 O, fully dissolved at room temperature to obtain a chelating agent.

[003...

Embodiment approach 2

[0040] (1) Accurately weigh 3.9748gY 2 o 3 (99.99%) and 0.6046gEu 2 o 3 (99.99%), the Y 2 o 3 and Eu 2 o 3 Put in a container, add 100ml 1:1 HNO to the container 3 , heating and stirring until boiling, and boiling for 5-10 minutes, so that the rare earth oxide is fully dissolved, and solution A is obtained;

[0041] (2) Accurately weigh 3.1694g diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 , add 50ml of distilled water, stir with a glass rod at room temperature to fully dissolve, and obtain solution B;

[0042] (3) Accurately weigh 1.8717g ammonium metavanadate NH 4 VO 3 , add 67ml of distilled water and 2.5685g of oxalic acid, stir with a glass rod at room temperature to fully dissolve, and obtain solution C;

[0043] Other steps are the same as Embodiment 1 of the present invention.

Embodiment approach 3

[0045] (1) Accurately weigh 3.9748gY 2 o 3 (99.99%) and 0.6046gEu 2 o 3 (99.99%), the Y 2 o 3 and Eu 2 o 3 Put in a container, add 100ml 1:1 HNO to the container 3 , heating and stirring until boiling, and boiling for 5-10 minutes, so that the rare earth oxide is fully dissolved, and solution A is obtained;

[0046] (2) Accurately weigh 2.1130g diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 , add 50ml of distilled water, stir with a glass rod at room temperature to fully dissolve, and obtain solution B;

[0047] (3) Accurately weigh 2.8075g ammonium metavanadate NH 4 VO 3 , add 100ml of distilled water and 3.8527g of oxalic acid, stir with a glass rod at room temperature to fully dissolve, and obtain solution C;

[0048] Other steps are the same as Embodiment 1 of the present invention.

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Abstract

The invention refers to a method for producing high efficient red small particles fluorescent powder, the fluorescent powder is Y1-xP1-yVyO4:xEu3+, x=0.06-0.15, y=0.2-0.8. The invention uses supersonic wave to combine with collosol-gelatum method to produce high efficiency red small particle fluorescent powder, the reaction temperature is lower than the temperature in SSR method greatly. The fluorescent powder particle is tiny and even, the shape of particle likes sphere, the purity is high, the quantum efficiency is high. It can be used in color plasma screen, impact energy saving light, mercury-less neon lamp, liquid crystal new background light house.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, that is, a method for preparing phosphors required for applications such as color plasma display screens (PDPs), compact energy-saving lamps, mercury-free neon lamps, and new background light sources for liquid crystal displays. Eu as a co-activator for the red phosphor approach. Background technique [0002] In the screen-making process of flat-panel display devices (such as PDPs, field emission displays (FED) and electroluminescent (EL) panels), phosphors are required to have high purity, fine particles (0.1-2 microns), uniformity, and high luminous efficiency. Short afterglow time, good thermal stability and long life. The phosphor with small particles can make the flat display device have better performance and higher efficiency, and the small particles can also provide higher packing density and less binder content. Therefore, the small-particle red phosphor is beneficial to ...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 袁曦明王红梅王永钱张继红庞明胡小华杨应国
Owner CHOW TAI SENG JEWELRY CO LTD
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