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Preparation method of nitrogen oxide yellow fluorescent powder material

A yellow phosphor, nitrogen oxide technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of shortening product life, restricting product development, different attenuation of phosphors, etc., to prolong the service life and widen the process window. , the effect of low price of raw materials

Inactive Publication Date: 2011-01-19
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the nitrogen oxide yellow phosphor products on the market are mainly red powder and green powder, which can be used with YAG yellow phosphor to achieve high color rendering index lighting and backlight white LED. However, due to the attenuation of the two systems Due to the difference between different products, the service life of the product is shortened sharply; secondly, most of the main patents of YAG yellow phosphor are in the hands of foreign companies, especially Nichia almost monopolizes the patent of YAG yellow phosphor, which restricts the development of our domestic products. development, so for the above situation, the present invention proposes a nitrogen oxide yellow phosphor material and its preparation method

Method used

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  • Preparation method of nitrogen oxide yellow fluorescent powder material
  • Preparation method of nitrogen oxide yellow fluorescent powder material
  • Preparation method of nitrogen oxide yellow fluorescent powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The first step to synthesize the precursor Ca of nitrogen oxide yellow phosphor powder 0.3 Sr 1.66 SiO 4 :

[0019] 1) According to the stoichiometric ratio of each element of Ca0.3Sr1.66SiO4, take SrCO310g, CaCO30.123g, SiO20.245g, and account for 3% catalyst SrF2 of the total mass of SrCO3, CaCO3 and SiO2;

[0020] 2) Put the weighed SrCO3, CaCO3, SiO2 and SrF2 into an alumina crucible after mixing and fully grinding, place the crucible in a tube furnace, sinter in air at 1200°C for 5 hours, and then cool to obtain Ca0.3Sr1. 66SiO4.

[0021] The second step is to synthesize the nitrogen oxide yellow phosphor material Ca 0.15 Sr 0.83 Si 2 o 2 N 2 :0.02Eu:

[0022] 1) According to the stoichiometric ratio of each element in Ca0.15Sr0.83Si2O2N2:0.02Eu, grind and sieve the obtained precursor Ca0.3Sr1.66SiO4, weigh 5g, α-Si3N42.811g and Eu2O30.141g, and finally add The 5% SrF of the material gross mass that takes by weighing and BaF Mixing aid, wherein SrF2: BaF2...

Embodiment 2

[0026] The first step to synthesize the precursor Ba of nitrogen oxide yellow phosphor powder 0.2 Sr 1.8 SiO 4 :

[0027] 1) Weigh SrCO30.743g, BaCO35g, SiO21.13g according to Ba0.2Sr1.8SiO4, and account for 3% catalyst SrF2 of the total mass of SrCO3, BaCO3 and SiO23;

[0028] 2) After mixing and fully grinding, put it in an alumina crucible, place the crucible in a tube furnace, sinter in air at 1200°C for 5 hours, and then cool to obtain Ba0.2Sr1.8SiO4.

[0029] The second step is to synthesize the nitrogen oxide yellow phosphor material Ba 0.1 Sr 0.88 Si2 o 2 N 2 :0.02Eu:

[0030] 1) According to the stoichiometric ratio of Ba0.1Sr0.88Si2O2N2:0.02Eu elements, grind and sieve the obtained Ba0.2Sr1.8SiO4, weigh 5g, weigh 2.53g of α-Si3N4 and 0.127g of Eu2O3, and finally add Aforementioned 5% SrF2 and BaF2 of weighing material gross mass are mixed auxiliary agents, wherein SrF2: BaF2=1: 1;

[0031] 2) Put the above-mentioned ingredients into a molybdenum crucible aft...

Embodiment 3

[0035] The first step to synthesize the precursor Ba of nitrogen oxide yellow phosphor powder 1.33 Sr 0.67 SiO 4 :

[0036] 1) Weigh SrCO35.653g, BaCO315g, SiO23.434g according to Ba1.33Sr0.67SiO4, and catalyst SrF2 accounting for 3% of the total mass of the previously weighed substances;

[0037] 2) After mixing and fully grinding, put it in an alumina crucible, place the crucible in a tube furnace, sinter in air at 1200°C for 5 hours, and then cool to obtain Ba1.33Sr0.67SiO4.

[0038] The second step is to synthesize the nitrogen oxide yellow phosphor material Ba 0.635 Sr 0.327 Si 2 o 2 N 2 :0.02Eu:

[0039] 1) After grinding and sieving the obtained Ba1.33Sr0.67SiO4 according to the stoichiometric ratio of each element, weigh 5g, then weigh 2.147g of α-Si3N4 and 0.108g of Eu2O3, and finally add 5% of the total mass of the previously weighed substances The mixing aid of SrF2 and BaF2, wherein SrF2: BaF2=1: 1;

[0040] 2) Put the above-mentioned ingredients into a m...

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Abstract

The invention relates to a preparation method of a nitrogen oxide yellow fluorescent powder material, comprising the following two steps: synthesizing a precursor (A, B)2SiO4 of nitrogen oxide yellow fluorescent powder, wherein, A is an Sr element, B is a Ba or Ca element, and the precursor (A, B)2SiO4 supplies a stable crystal structure; and on the basis of a matrix structure supplied by the precursor, synthesizing the nitrogen oxide yellow fluorescent powder material (A, B)1-xSiyOzN2 / 3+4 / 3y-2 / 3z:xEu, and modulating the luminescent wavelength of the nitrogen oxide yellow fluorescent powder (A, B)1-xSiyOzN2 / 3+4 / 3y-2 / 3z:xEu by adjusting the proportion of element A to element B so that the peak of emission wavelength reaches 550-580nm.

Description

technical field [0001] The invention relates to a nitrogen oxide yellow phosphor material and a preparation method thereof, in particular to a new method for preparing the nitrogen oxide yellow phosphor material by using a common cheap compound as a raw material and adopting a two-step synthesis method. Background technique [0002] Japan’s Nichia’s patents cover a wide range of chemical compositions of garnet-type oxide phosphors, especially YAG yellow phosphor component Y 3 al 5 o 12 : Ce 3+ Make systematic adjustments, where Y 3+ in Tb 3+ or Gd 3+ be replaced or Al 3+ Take Ga 3+ Substituted and derived into multiple series (Y, Gd, Sm) 3 (Al, Ga) 5 o 12 : Ce 3+ It can be matched with yellow-orange phosphors with chips of different blue wavelengths (440-480nm). [0003] Nitride yellow phosphor due to its unique excitation spectrum (excitation range covers ultraviolet, near ultraviolet, blue light and even green light) and excellent luminescence characteristics (...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 赵莉
Owner IRICO
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