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Nano fluorescent powder preparing method

A nano-phosphor, soluble technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of unfavorable display image dynamic display, imperfect color PDP performance, long luminescence afterglow time, etc., to improve quantum luminescence efficiency, Small particles and good thermal stability

Inactive Publication Date: 2006-11-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the PDP, the wavelength emitted by the inert gas is in the vacuum ultraviolet (VUV), which is 147nm. Therefore, phosphors with good performance under this condition are required to meet the needs of the PDP industry. However, most PDP manufacturers still use the traditional fluorescent lamps. Powder, resulting in imperfect performance of color PDP, for example: the current market sales of green phosphor used by PDP manufacturers, there are uneven particles, large particles, etc. can not well meet the needs of the development of industrial screen manufacturing technology; especially afterglow A series of problems such as long time and unfavorable dynamic display of screen images

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment approach 1

[0027] Preparation method embodiment 1 of the present invention, its steps are:

[0028] (1) Accurately weigh 7.94 grams of zinc oxide (ZnO) (analytical pure), 0.29 grams of manganese carbonate (MnCO 3 ) (analytically pure), 0.0045 grams of erbium oxide (Er 2 o 3 ) (99.99%), 11.5 mg tetraethyl orthosilicate ((C 2 h 5 ) 4 SiO 4 ) (analytically pure);

[0029] (2) zinc oxide (ZnO), manganese carbonate (MnCO 3 ), erbium oxide (Er 2 o 3 ) mixed into the beaker;

[0030] (3) Add 50 mg of 1:1 nitric acid (HNO 3 ) (analytical pure), heated and stirred to boiling, and fully dissolved the substance in the beaker;

[0031] (4) Add 50 milliliters of distilled water, and add 2 grams of cosolvents—boric acid (H 3 BO 3 ) (analytically pure), the mixed solution in the beaker is diluted; cooling;

[0032] (5) Slowly add 11.5 milliliters of tetraethyl orthosilicate ((C 2 h 5 ) 4 SiO 4 ), stir evenly and put it into a water bath device at 60-90°C to make it peptized until tran...

Embodiment approach 2

[0042] Preparation method embodiment 2 of the present invention, its steps are:

[0043] (1) Accurately weigh 7.94 grams of zinc oxide (ZnO) (analytical pure), 0.58 grams of manganese carbonate (MnCO 3 ) (analytically pure), 0.009 grams of erbium oxide (Er 2 o 3 ) (99.99%), 50 mg of 1:1 nitric acid (HNO 3 ) (analytically pure), 11.5 milligrams of ethyl orthosilicate ((C 2 h 5 ) 4 SiO 4 ) (analytically pure);

[0044] (2) zinc oxide (ZnO), manganese carbonate (MnCO 3 ), erbium oxide (Er 2 o 3 ) mixed into the beaker;

[0045] (3) Add nitric acid (HNO 3 ), heating and stirring until boiling, and fully dissolving the substance in the beaker;

[0046](4) First add 2 grams of boric acid to 50 milliliters of distilled water for dilution, then add boric acid and distilled water to the container to dilute the mixed solution in the beaker; cool;

[0047] Other steps are the same as the preparation method embodiment 1 of the present invention.

[0048] Such as figure 1 , ...

Embodiment approach 3

[0049] Preparation method embodiment 3 of the present invention, its steps are:

[0050] (1) Accurately weigh 7.94 grams of zinc oxide (ZnO) (analytical pure), 1.15 grams of manganese carbonate (MnCO 3 ) (analytically pure), 0.0023 grams of erbium oxide (Er 2 o 3 ) (99.99%), 50 mg of 1:1 nitric acid (HNO 3 ) (analytically pure), 11.5 milligrams of ethyl orthosilicate ((C 2 h 5 ) 4 SiO 4 ) (analytically pure);

[0051] (2) zinc oxide (ZnO), manganese carbonate (MnCO 3 ), erbium oxide (Er 2 o 3 ) mixed into the beaker;

[0052] (3) Add nitric acid (HNO 3 ), heating and stirring until boiling, and fully dissolving the substance in the beaker;

[0053] (4) Add 50 milliliters of distilled water, and add 4 grams of co-solvent---boric acid (H 3 BO 3 ) (analytically pure), the mixed solution in the beaker is diluted; cooling;

[0054] Other steps are the same as the preparation method embodiment 1 of the present invention.

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Abstract

The present invention relates to a kind of preparation method of nano fluorescent powder, nano fluorescent powder is a compound, and its chemical formula is composed of: Zn 2-x-y SiO 4 : xMn, yEr, where, 0.01≤x≤0.15, 0.0001≤y≤0.001. The inventive method adopts Mn 2+ 、Er 3+ As a co-activator, it can greatly improve the quantum luminous efficiency of phosphor products, has good thermal stability and long life, and meets the requirements of color PDP for the luminescence performance of phosphors; at the same time, it also plays a certain role in shortening the afterglow time of phosphors. . The nano fluorescent powder of the present invention has fine particles (particle diameter 30-100nm), good dispersibility and superior luminous performance. For the defect of long afterglow time of traditional green phosphor powder, the present invention adopts the method of increasing Mn 2+ The dosage and the use of Mn 2+ with Er 3+ Co-activation means to overcome, to meet the color PDP on the persistence time performance requirements.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a method for preparing fluorescent powder used in novel backlight sources such as color plasma display screens (PDPs), compact energy-saving lamps, mercury-free neon lights, and liquid crystal displays. technical background [0002] With the rapid development of science and technology and the continuous improvement of people's needs, a new type of flat panel display—color plasma flat panel display (PDP) has developed rapidly and has become the most promising large-screen high-definition flat panel display technology. PDP has the advantages of large size, light weight and planarization. The working principle of PDP is that the ultraviolet light generated by inert gas discharge excites the three-color phosphor to emit light. Therefore, in the PDP industry, in addition to the driving circuit, the most important thing is the luminescent material, that is, the phosphor. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79
Inventor 袁曦明王永钱王红梅张继红胡小华杨应国庞明
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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