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rare earth ions 3+ adulterated 2 the si 4 no 6 The preparation method of c yellow fluorescent powder

A technology of yellow fluorescent powder and rare earth ions, which is applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., can solve problems such as poor performance and high manufacturing cost of C-based phosphors, and reduce calcination temperature and time, and reduce calcination. Effects of time and excitation wavelength width

Active Publication Date: 2017-07-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention aims to overcome the existing Y 2 Si 4 N 6 The disadvantages of high manufacturing cost and poor performance of C-based phosphors, the invention provides a rare earth ion Ce 3+ Doped Y 2 Si 4 N 6 Preparation method of C-based yellow fluorescent powder

Method used

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  • rare earth ions <sup>3+</sup> adulterated <sub>2</sub> the si <sub>4</sub> no <sub>6</sub> The preparation method of c yellow fluorescent powder
  • rare earth ions <sup>3+</sup> adulterated <sub>2</sub> the si <sub>4</sub> no <sub>6</sub> The preparation method of c yellow fluorescent powder
  • rare earth ions <sup>3+</sup> adulterated <sub>2</sub> the si <sub>4</sub> no <sub>6</sub> The preparation method of c yellow fluorescent powder

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preparation example Construction

[0022] For existing Y 2 Si 4 N 6 The present invention provides a new preparation scheme for the problems existing in the preparation method of C-based phosphor. In the optimization method of the present invention, the precursor is prepared by the sol-gel method, and the powder is calcined by the carbothermal reduction nitriding method. The prepared yellow fluorescent powder has the advantages of cheap raw materials, short calcination time, mild experimental conditions and uniform grain size distribution. Etc. The invention provides a rare earth ion Ce 3+ Doped Y 2 Si 4 N 6 The invention discloses a preparation method of C yellow fluorescent powder, which belongs to the technical field of luminescent material preparation. The preparation method of the fluorescent powder mainly includes the following steps: according to the stoichiometric composition Y 2(1-x) Si 4 N 6 C: 2xCe for ingredients to form Y 2 Si 4 N 6The precursor raw materials of C are yttrium nitrate a...

Embodiment 1

[0039] According to the mass ratio converted into oxides is Y 2 o 3 :SiO2 2 :CeO 2 :C=8.12:9.09:0.65:1 (equivalent to Ce 3+ Doping amount x=5mol%; The actual amount of carbon is 2.2 times of the theoretical amount of carbon) to measure yttrium nitrate (Y(NO 3 ) 3 ), tetraethyl orthosilicate (TEOS), cerium nitrate (Ce(NO 3 ) 3 ), sucrose (C 12 h 22 o 11 ) each raw material, all above-mentioned raw materials are dissolved in the mixed solvent that deionized water and absolute ethanol are formed, wherein the total mass of raw material: the mass of deionized water: the mass of absolute ethanol=1.9:3:1, stirring and dissolving, drop Concentrated sulfuric acid (H 2 SO 4 ), the mass ratio of sucrose to concentrated sulfuric acid was 10:1, stirred at room temperature until the sol was formed, then put it into an oven, firstly kept it at 100°C for 6h, then kept it at 160°C for 6h, took it out and ground it, put it into a tube type In the furnace, the temperature rises from ...

Embodiment example 2

[0041] On the basis of Example 1, increase the consumption of C. According to the mass ratio converted into oxides is Y 2 o 3 :SiO2 2 :CeO 2 :C=5.59:6.67:0.48:1 (equivalent to Ce 3+ Doping amount x=5mol%; The actual amount of carbon is 3.0 times of the theoretical amount of carbon) to measure yttrium nitrate ((Y(NO 3 ) 3 ), tetraethyl orthosilicate (TEOS), cerium nitrate (Ce(NO 3 ) 3 ), sucrose (C 12 h 22 o 11 ) each raw material, all above-mentioned raw materials are dissolved in the mixed solvent that deionized water and absolute ethanol are formed, wherein the total mass of raw material: the mass of deionized water: the mass of absolute ethanol=1.9:3:1, stirring and dissolving, drop Concentrated sulfuric acid (H 2 SO 4 ), the mass ratio of sucrose to concentrated sulfur was 10:1, stirred at room temperature until the sol was formed, then put it into an oven, firstly kept it at 100°C for 6h, then kept it at 160°C for 6h, took it out and ground it, put it into the...

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Abstract

The invention relates to a preparation method of a rare earth ion Ce<3+> doped Y2Si4N6C yellow fluorescent powder, wherein the method includes the steps: 1) weighing yttrium nitrate, ethyl orthosilicate, cerium nitrate as a doping agent, and saccharose as a carbon source to be used as precursor raw materials, evenly dissolving the precursor raw materials in a mixed solvent containing alcohol and water, then adding concentrated sulfuric acid, and stirring to obtain a mixed sol; 2) pre-carbonizing the mixed sol, grinding and crushing, placing in a nitrogen atmosphere and at the temperature of 700-900 DEG C, and carbonizing to obtain a first mixed powder; and 3) calcining the first mixed powder at the temperature of 1500-1700 DEG C and in a nitrogen atmosphere, to obtain the yellow fluorescent powder.

Description

technical field [0001] The invention belongs to the technical field of luminescent material preparation, in particular to a rare earth ion Ce 3+ Doped Y 2 Si 4 N 6 A preparation method of C-based yellow fluorescent powder. Background technique [0002] White light LED is an emerging product in the lighting market. Compared with traditional lighting methods, white light LED has the advantages of energy saving, environmental protection, long service life, low working voltage and fast response speed. White light LED lighting is generally realized by using phosphor powder coating light conversion method, that is, the light emitted by the LED chip is used to excite the phosphor powder, and the finally generated fluorescence is mixed with each other to form white light. There are three ways to realize white light emission, one is red, The green and blue three-color phosphors are combined with ultraviolet LED chips to effectively excite the three-primary-color phosphors by ultr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79H01L33/50
Inventor 刘茜万洁琼杨华魏钦华
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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