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A kind of micron silicate spherical phosphor and preparation method thereof

A phosphor and silicate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of polluted powder, incomplete reaction, complicated preparation process, etc., achieve excellent durability and weather resistance, and facilitate industrial production. , luminous colorful effect

Active Publication Date: 2020-05-19
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former spray combustion method can obtain micron-sized powder, but the particle size is small, usually several to ten microns, and in the preparation process, it is necessary to add organic reagents to prepare the slurry, and the volatilization of organic compounds will produce Hollow spheres, which will cause the spheres to break and form irregular particles; at the same time, the combustion gas is mostly acetylene and oxygen. When the gas reacts and burns, due to the incomplete reaction, there will usually be carbon residues, which will pollute the powder and affect the luminescence of the phosphor. Sex has a very serious impact
The latter liquid-phase precipitation method usually obtains nano-scale particles, and the preparation process is complicated, and the powder output is low, which is not conducive to industrial production.

Method used

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  • A kind of micron silicate spherical phosphor and preparation method thereof
  • A kind of micron silicate spherical phosphor and preparation method thereof
  • A kind of micron silicate spherical phosphor and preparation method thereof

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Embodiment 1

[0035] This embodiment provides a method for preparing a micron-sized silicate spherical phosphor, specifically providing a micron-sized Ca 3 Y 1.9 Si 3 o 12 :0.1Eu 3+ The preparation method of red spherical fluorescent powder comprises the following steps:

[0036] S1, with CaCO 3 , Y 2 o 3 , SiO 2 and Eu 2 o 3 As a raw material, the original fluorescent powder is prepared by a high-temperature solid phase method.

[0037] Specifically, step S1 includes the following sub-steps:

[0038] S11, take by weighing 25.5877g analytically pure (99.9%) CaCO respectively 3 , 18.4739g high-purity (99.99%) Y 2 o 3 , 1.5153g high-purity (99.99%) Eu 2 o 3 and 15.5229 g of analytically pure (99.9%) SiO 2 . Among them, CaCO 3 , Y 2 o 3 and SiO 2 Mainly used as a reactant for the synthesis of phosphors, Eu 2 o 3 It is mainly used as the activator raw material of phosphor powder.

[0039] S12. Mix all the raw materials weighed in step S11 together for grinding to form a ...

Embodiment 2

[0062] This embodiment provides a method for preparing a micron-sized silicate spherical phosphor, specifically providing a micron-sized Ca 3 Gd 1.9 Si 3 o 12 :0.1Eu 3+ The preparation method of red spherical fluorescent powder comprises the following steps:

[0063] S1, with CaCO 3 、Gd 2 o 3 , SiO 2 and Eu 2 o 3 As a raw material, the original fluorescent powder is prepared by a high-temperature solid phase method. Specifically, step S1 includes the following sub-steps:

[0064] S11. According to the stoichiometric ratio, weigh CaCO 3 、Gd 2 o 3 、Eu 2 o 3 and SiO 2 .

[0065] S12. Mix all the raw materials weighed in step S11 together for grinding to form a mixed material. Specifically, ball milling is used for grinding, and all the raw materials weighed are put into a ball mill jar, and ZrO is added at the same time 2 Grinding balls, anhydrous ethanol and ammonium polyacrylate, carry out wet mixing, the ball milling time is 6h, and the rotation speed is 100...

Embodiment 3

[0073] This embodiment provides a method for preparing a micron-sized silicate spherical phosphor, specifically providing a micron-sized Ca 3 Lu 1.9 Si 3 o 12 :0.1Eu 3+ The preparation method of red spherical fluorescent powder comprises the following steps:

[0074] S1, with CaCO 3 、Lu 2 o 3 , SiO 2 and Eu 2 o 3 As a raw material, the original fluorescent powder is prepared by a high-temperature solid phase method. Specifically, step S1 includes the following sub-steps:

[0075] S11. According to the stoichiometric ratio, weigh CaCO 3 、Lu 2 o 3 、Eu 2 o 3 and SiO 2 .

[0076] S12. Mix all the raw materials weighed in step S11 together for grinding to form a mixed material. Specifically, ball milling is used for grinding, and all the raw materials weighed are put into a ball mill jar, and ZrO is added at the same time 2 Grinding balls, absolute ethanol and ammonium polyacrylate are used for wet mixing, the ball milling time is 6 hours, and the rotation speed ...

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Abstract

The invention relates to a micro-sized spherical silicate phosphor and a preparation method thereof. The general chemical formula of the micro-sized spherical silicate phosphor is A3B2-xSi3O12:xRE, Ais Mg, Ca or Sr, B is Y, La, Gd or Lu, RE is one or a combination of Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb, x is 0.005-0.2, the micro-sized spherical silicate phosphor is a solid sphere having a particle size of 10-100 [mu]m, and the spheroidization rate is 100%. The micro-sized spherical silicate phosphor obtained in the invention has the advantages of good shape, large particle size, high luminous intensity, excellent durability, excellent weather resistance, rich luminescent colors and solid spherical shape, and the preparation method has the advantages of simplicity, and facilitation of industrial production.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a micron silicate spherical fluorescent powder and a preparation method thereof. Background technique [0002] Since the end of the last century, Japanese scientists have adopted blue LED (light-emitting diode) chips and yellow YAG phosphor [(Y,Gd) 3 al 5 o 12 : Ce 3+ ] Since the white-light-emitting LED solid-state light source was produced, white-light LEDs have gradually entered people's daily lives, opening up a new chapter in the history of human lighting. The fourth-generation new light source has very broad application prospects. [0003] Phosphor powder matrices currently on the market mainly include sulfides, nitrides, nitrogen oxides, aluminates, molybdates, silicates, and the like. Sulfide-based phosphors are limited in practical applications due to factors such as low luminance, poor chemical stability, and certain toxicity. Phosphor po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79
CPCC09K11/7774C09K11/7792
Inventor 孙旭东孟琦涵李继光李晓东霍地朱琦刘绍宏张牧李娜
Owner NORTHEASTERN UNIV LIAONING
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