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Method for treating surface of phosphor

A phosphor, surface treatment technology, applied in thin material treatment, chemical instruments and methods, applications, etc., can solve problems such as uniform coating of protective materials

Inactive Publication Date: 2006-04-19
SAMSUNG CORNING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to uniformly coat the protective material on the surface of phosphor particles by these methods

Method used

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  • Method for treating surface of phosphor
  • Method for treating surface of phosphor
  • Method for treating surface of phosphor

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] With 1000ml diethylene glycol (DEG), 11.11g Y(NO 3 )6H 2 O and 9.6 g of polyvinylpyrrolidone (PVP) were put into a reactor and stirred at 100 °C to completely dissolve the precursor and PVP in DEG. 1000ml DEG and 100g white phosphor (BaMg 2 Al 10 o 18 :Eu, LaPO 4 :CeTb and Y 2 o 3 :Eu (a mixture of 42:26:22)) was put into another reactor, and ball milled at 100°C to obtain a uniform phosphor dispersion system. The resulting dispersion and precursor solution were mixed in a separate reactor and stirred at 160 °C for 4 h to 2 o 3 layer uniformly coats the surface of phosphor particles, which are treated at 600°C to obtain a layer coated with 10-50nm thick crystalline Y 2 o 3 layer of phosphor particles. Electron micrographs of the obtained particles are shown in Figure 2A shown.

example 2

[0028] The procedure of Example 1 was repeated except that the mixture of dispersion system and precursor solution was stirred at 160 °C for 2 h instead of 4 h to obtain crystals coated with Y 2 o 3 phosphor particles. Electron micrographs of the obtained particles are shown in Figure 2B shown.

example 3

[0030] In addition to using 25g Y(NO 3 )6H 2 O and 21.6g PVP instead of 11.11g Y (NO 3 )6H 2 In addition to O and 9.6gPVP, repeat the process of example 1 to obtain crystal Y coated with 2 o 3 phosphor particles. Electron micrographs of the obtained particles are shown in Figure 2C shown.

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Abstract

A method for treating surface of the phosphor particles, which comprises the steps of dispersing the phosphor particles in a solvent, separately dissolving a precursor of a surface-protecting material in a solvent, and combining the resulting dispersion and solution provides phosphor particles having an evenly coated layer of the surface-protecting material.

Description

technical field [0001] The present invention relates to a method for efficiently surface treating phosphor particles. Background technique [0002] Phosphors have been used in fluorescent lamps, mercury lamps, and display devices such as cathode ray tubes (CRTs), plasma displays, and field emission displays. The luminous efficiency of a phosphor depends on its surface structure, composition, and surface crystallinity, therefore, attempts have been made to coat phosphor particles with surface protective materials to protect the phosphor surface properties during preparation, application, heating, irradiation, and other processes . [0003] Typically, phosphors are coated by one of liquid coating methods including sol-gel methods and electrostatic adsorption in solution (see U.S. Pat. Korean Patent Publications). However, it is difficult to uniformly coat the protective material on the surface of phosphor particles by these methods. [0004] Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02
CPCC08K9/08Y10T428/2991C09K11/02Y10S428/917
Inventor 赵硕显文柱昊金东朝郑善镐郑京泽河海秀
Owner SAMSUNG CORNING CO LTD
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