Oxynitride phosphor powder, nitride phosphor powder and a production method therefor

A technology of nitrogen oxides and manufacturing methods, which is applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, cold cathode manufacturing, etc., can solve the problems of easy vitrification of precursors, formation of massive particles, and particle coarsening, etc., to achieve Effect of excellent temperature characteristics or luminous efficiency

Inactive Publication Date: 2012-08-01
RES & BUSINESS FOUND SUNGKYUNKWAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this also poses the problem that nano-sized silica-containing precursors are prone to vitrification, particle coarsening, and the formation of agglomerated particles.

Method used

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  • Oxynitride phosphor powder, nitride phosphor powder and a production method therefor
  • Oxynitride phosphor powder, nitride phosphor powder and a production method therefor
  • Oxynitride phosphor powder, nitride phosphor powder and a production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0195] Manufacture of CaAlSiN Nitride Using Second Precursor 3 :Eu 2+

[0196] As the metal source aqueous solution, in order to use Ca 0.92 Eu 0.08 AlSiN 3 Synthesize 5g of phosphors, using dissolved in deionized water (Deionized water, D.I water) to include 17.22gCa(NO 3 ) 2 30 (weight)% aqueous solution, 25.67gAl(NO 3 ) 3 9H 2 50 (weight)% aqueous solution of O, 10.00gSiO 2 (sol) of 20 (weight)% aqueous solution and 3.16gEuCl 3 ·6H 2 A solution of 30% by weight O in water. The solution was impregnated in 12.26g of crystalline cellulose powder to obtain the first precursor, and then fired at a temperature of 300°C in air to obtain a particle size of The second precursor of ( image 3 ). After cooling at normal temperature, it was placed in a horizontal tube electric furnace in which nitrogen flowed at 1 cm / s, and fired at a temperature of 1600° C. for 5 hours. Figure 4 It is the nitride phosphor CaAlSiN obtained by this example 3 :Eu 2+ The XRD pattern. T...

Embodiment 2

[0198] Manufacture of Oxynitride Ca-α-SiAlON:Eu Using the First Precursor 2+

[0199] Using the nitriding method of the first precursor, as a metal salt solution, in order to use Ca 0.8 Eu 0.05 al 2.4 Si 9.6 o 0.7 N 15.3 5g of phosphors were obtained, the metal salt was dissolved in deionized water (Deionized water, D.I water) and each metal salt solution was used: 3.65gCa(NO 3 ) 2 30 (weight)% metal salt solution, 15.02gAl (NO 3 ) 3 9H 2 50 (weight)% metal salt solution of O, 23.40gSiO 2 (sol) of 20 (weight)% metal salt solution and 0.48gEuCl 3 ·6H 2 O in a 30% by weight aqueous metal salt solution. The mixed solution was impregnated in 15.48 g of cellulose powder. Now, according to the following reaction formula, utilize the carbon contained in the cellulose powder to determine the usage amount of the cellulose:

[0200] Reaction formula: Ca 0.8 Eu 0.05 al 2.4 Si 9.6 o 23.675 +22.975C (required carbon) +7.65N 2

[0201] → Ca 0.8 Eu 0.05 al 2.4 Si 9....

Embodiment 3

[0204] Manufacture of Oxynitride β-SiAlON:Eu Using Second Precursor 2+

[0205] Synthesize 5gEu with the method identical with embodiment 2 0.05 Si 5 al 0.95 o 10.5 N 6.95 , using 12.38gAl(NO 3 ) 3 9H 2 50 (weight)% of O, 25.38g of SiO 2 (sol) of 20 (weight)% and 1.00g of EuCl 3 ·6H 2 30% by weight of O. The mixed solution was impregnated in 14.61 g of cellulose powder. The firing in the nitrogen-containing gas and the environment in which the gas flows at a fixed speed in the above-mentioned embodiment is firing at 1600° C. for 5 hours at a linear flow rate of 1 cm / s in a nitrogen atmosphere. Synthesized β-SiAlON:Eu 2+ By XRD analysis ( Figure 8 ) to confirm.

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Abstract

The present invention relates to a production method for oxynitride and nitride phosphor powders which can be used in displays such as vacuum fluorescent displays (VFDs), field emission displays (FEDs) and LED display devices, or in lighting devices such as cold cathode fluorescent lamps (CCFL) and LED lamps, or in light-emitting apparatuses such as backlights, wherein the production method for phosphor powders comprises the step of subjecting part or all of a metal oxide to nitriding by calcining in an atmosphere containing nitrogen, using a fine carbon substance.

Description

technical field [0001] The present application relates to a method for producing oxynitride phosphor powder and oxynitride phosphor powder produced by the production method, and a method for producing nitride phosphor powder and the nitride phosphor powder produced by the production method. Background technique [0002] Phosphors are used in vacuum fluorescent displays (VFDs), field emission displays (FEDs), light emitting diode (LED) display devices or LED backlights, and the like. In the application of any of these phosphors, excitation energy for exciting the phosphors is required, and the energy is excited by excitation light having high energy such as vacuum ultraviolet rays, ultraviolet rays, electron beams, or blue light to generate visible light. However, these phosphors have problems in that they are exposed to high-energy excitation light for a long period of time, resulting in a decrease in luminance or deterioration in color rendering index due to heat or moistur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/80H01J61/35H01L33/50H01L51/54
CPCH01J9/227H01J2329/20C09K11/7734C09K11/77347C09K11/77348
Inventor 尹大镐赵德洙正木孝树宋荣显林一志韩相赫
Owner RES & BUSINESS FOUND SUNGKYUNKWAN UNIV
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