Preparation methods of fluorosilicate red fluorescent powder and composition containing fluorescent powder, products and applications

A technology of red fluorescent powder and fluorosilicate, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of low absorption intensity of fluorescent materials, difficulty in research of fluorescent powder materials, and complicated production process, etc., to achieve luminescence Stable performance, easy long-term storage, and stable physical and chemical properties

Active Publication Date: 2016-03-23
烟台布莱特光电材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of phosphor needs to be doped with rare earth, and the raw material requirements are relatively special. It usually needs to be prepared under high temperature and high pressure, and the preparation conditions are harsh.
Not only high energy consumption, but also low yield, so its production cost is high and the price is very expensive
Other current methods of preparing phosphors, such as hydrothermal method, microwave method, high-temperature solid-phase method, etc., are s

Method used

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  • Preparation methods of fluorosilicate red fluorescent powder and composition containing fluorescent powder, products and applications
  • Preparation methods of fluorosilicate red fluorescent powder and composition containing fluorescent powder, products and applications
  • Preparation methods of fluorosilicate red fluorescent powder and composition containing fluorescent powder, products and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example is used to illustrate the preparation method of the fluorosilicate red phosphor powder provided by the present invention, and the red phosphor powder prepared by this method.

[0037] (1) 2.6gKMnO 4 (purchased from Yantai Sanhe Chemical Reagent Co., Ltd.) and 20.3g KF were added into 260ml (60vol%) hydrofluoric acid and stirred for 15min until uniformly mixed, then added H 2 o 2 Until the color of the solution changes, a mixed solution is obtained;

[0038] (2) Add 10 g of powdered quartz glass to the mixed solution obtained in step (1), heat to 60° C., keep warm for 2 hours, cool down to 20° C. in a water bath, continue stirring for 12 hours, and obtain a yellow solid after filtration;

[0039] (3) Wash the yellow solid obtained in step (2) with a small amount of deionized water and absolute ethanol, and dry at 150° C. to obtain 6 g of the red phosphor.

[0040] Measure the XRD pattern (see figure 1 ), indicating that it has the same K 2 SiF 6 corres...

Embodiment 2

[0045] This example is used to illustrate the preparation method of the fluorosilicate red phosphor powder provided by the present invention, and the red phosphor powder prepared by this method.

[0046] (1) 2.6gKMnO 4 (purchased from Yantai Sanhe Chemical Reagent Co., Ltd.) and 20.3g KF were added into 260ml (60vol%) hydrofluoric acid and stirred for 15min until uniformly mixed, then added H 2 o 2 Until the color of the solution changes, a mixed solution is obtained;

[0047] (2) Add 10 g of powdered borosilicate glass to the mixed solution obtained in step (1), heat to 50° C., keep warm for 3 hours, cool down to 30° C. in a water bath, continue stirring for 3 hours, and obtain a yellow solid after filtration;

[0048] (3) Wash the yellow solid obtained in step (2) with a small amount of deionized water and absolute ethanol, and dry at 150° C. to obtain 6 g of the red phosphor.

[0049] Measure the XRD figure of gained powder by X-ray powder diffractometer (model D8-ADVANC...

Embodiment 3

[0051] This example is used to illustrate the preparation method of the fluorosilicate red phosphor powder provided by the present invention, and the red phosphor powder prepared by this method.

[0052] (1) 2.6gKMnO 4 (purchased from Yantai Sanhe Chemical Reagent Co., Ltd.) and 20.3gKF were added into 52ml (60vol%) hydrofluoric acid and stirred for 15min until they were evenly mixed, and H 2 o 2 Until the color of the solution changes, a mixed solution is obtained;

[0053] (2) Add 10 g of powdered quartz glass to the mixed solution obtained in step (1), heat to 70° C., keep warm for 1 hour, cool down to 10° C. in a water bath, continue to stir for 8 hours, and obtain a yellow solid after filtration;

[0054] (3) Wash the yellow solid obtained in step (2) with a small amount of deionized water and absolute ethanol, and dry at 150° C. to obtain 6 g of the red phosphor.

[0055] Measure the XRD figure of gained powder by X-ray powder diffractometer (model D8-ADVANCE, purchas...

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Abstract

The invention provides a preparation method of fluorosilicate red fluorescent powder. The red fluorescent powder is shown by a general formula I: M2SiF6: Mn<4+> (I), wherein M is selected from one or two of K and Na. The preparation method of the fluorosilicate red fluorescent powder comprises the following steps: (1) adding MMnO4 and MF into hydrofluoric acid, carrying out stirring until the aforementioned three materials are uniformly mixed, and dropwise adding H2O2 into the mixture until the color of the solution is changed to obtain mixed liquor; (2) adding a powdery substance containing silicon oxide into the mixed liquor, heating the liquor with the substance at first for full reaction, then carrying out cooling to separate out a crystal, and carrying out filtration to obtain a yellow solid; and (3) washing the yellow solid obtained in the step (2) by separately using a small amount of pure water and an organic solvent, and carrying out drying treatment to obtain the red fluorescent powder. The invention also provides a preparation method of a composition containing the fluorescent powder, the red fluorescent powder or the composition containing the fluorescent powder prepared by using the method, and applications of the fluorescent powder or the composition containing the fluorescent powder in LED (Light-Emitting Diode) illumination or backlight elements or equipment.

Description

technical field [0001] The present invention relates to a preparation method of fluorescent powder, in particular to a preparation method of fluorosilicate red fluorescent powder, a preparation method of a composition containing the red fluorescent powder, and the red fluorescent powder prepared by the above preparation method or containing The composition of the red phosphor, and the use of the red phosphor or the composition containing it in LED lighting or LED backlight components or equipment. Background technique [0002] A light-emitting diode (Light-Emitting Diode, referred to as LED) is a semiconductor electronic component that converts electrical energy into light energy. This kind of electronic component appeared as early as 1962. In the early days, it could only emit low-level red light, and later developed other versions of monochromatic light. Today, the light that can be emitted has covered visible light, infrared rays, and ultraviolet rays, and the breadth has...

Claims

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Application Information

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IPC IPC(8): C09K11/61H01L33/50
CPCC09K11/616H01L33/502
Inventor 师琼周小平王相菲姜涛涛夏小勇豆帆朱洪维
Owner 烟台布莱特光电材料有限公司
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