Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for low temp synthesizing rareearth oxidate fluorescent powder

A rare earth oxide, solid-phase synthesis technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high energy consumption and high configuration requirements of heating equipment, reduce maintenance and maintenance costs, and facilitate the preparation of large-scale products. , the effect of prolonging the service life

Inactive Publication Date: 2005-11-16
SOUTH CHINA NORMAL UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above preparation process consumes a lot of energy, and the configuration requirements of heating equipment in production are relatively high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Y 1.96 o 3 :Eu 3+ 0.04 Preparation of red phosphor

[0022] The reactant is molar ratio Y 2 o 3 :Eu 2 o 3 =1.96∶0.04 Accurately weigh Y 2 o 3 、Eu 2 o 3 , mixed with 40% (weight percent, Wt%) template agent of the total amount of reactants, and at the same time adding ethanol as a grinding aid, and grinding in an agate mortar or ball mill. Dry the above-mentioned ground mixture, put it into a corundum crucible, compact it, put it into a heating container, heat it at 750°C for 4 hours, take it out while it is hot, cool it, and grind it. The template agent is washed off with deionized water and then dried to obtain the product.

[0023] In this example, the templating agent is magnesium chloride.

Embodiment 2

[0024] Example 2 Y 1.97 o 3 :Eu 3+ 0.03 Preparation of red phosphor

[0025] The reactant is molar ratio Y 2 o 3 :Eu 2 o 3 =1.97∶0.03 Accurately weigh Y 2 o 3 、Eu 2 o 3 , mixed with 20% ratio (weight percent, Wt%) template agent of the total amount of reactants, and at the same time adding ethanol as a grinding aid, and grinding in an agate mortar or ball mill. Dry the above-mentioned ground mixture, put it into a corundum crucible, compact it, put it into a heating container, heat it at 700°C for 2 hours, take it out while it is hot, cool it and grind it. The template agent is washed off with deionized water and then dried to obtain the product.

[0026] In this example, the templating agent is a mixture of calcium chloride and magnesium chloride in a molar ratio of 1:1.

Embodiment 3

[0027] Example 3 Y 1.95 o 3 :Eu 3+ 0.05 Preparation of red phosphor

[0028] Reactant molar ratio Y 2 o 3 :Eu 2 o 3 =1.95∶0.05 Accurately weigh Y 2 o 3 、Eu 2 o 3 , mixed with 10% (weight percent, Wt%) template agent of the total amount of reactants, and at the same time adding ethanol as a grinding aid, and grinding in an agate mortar or ball mill. Dry the above-mentioned ground mixture, put it into a corundum crucible, compact it, put it into a heating container, heat it at 800°C for 2 hours, take it out while it is hot, cool it and grind it. The product is obtained after post-processing.

[0029] In this example, the templating agent has a molar ratio of (NH 4 ) 2 HPO 4 (Diammonium hydrogen phosphate): Li 2 CO 3 (lithium carbonate): MgCl 2 (Magnesium chloride)=2:1:1 The mixture is heated and reacted.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a low-temp. solid phase synthesis method of rare earth oxide fluorescence powder. Said method is implemented under the condition of the presence of template, and said method includes the following steps: mixing materials, grinding, drying, sampling, ignition and post-treatment. Its reaction temp. can be controlled at 600-900 deg.C.

Description

(1) Technical field [0001] The invention relates to a low-temperature solid-phase synthesis method for rare earth oxide fluorescent powder, which belongs to the technical field of chemical synthesis. (2) Technical background [0002] The molecular formula of rare earth oxide phosphor is: Ln 2 o 3 :R 3+ (that is, rare earth oxide doped rare earth luminescent ion R 3+ ), Ln=one or two of La, Y and Gd (lanthanum, yttrium and gadolinium). R 3+ (other rare earth luminescent ions except La, Y and Gd) including Ge 3+ ,...,Eu 3+ , Tb 3+ One or two of them, etc. Rare earth oxide phosphors have a wide range of applications, such as red phosphor Y 2 o 3 :Eu 3+ (Eu 3+ Yttrium oxide), as ultraviolet (UV) or cathode ray (CRT) red phosphor, has been used in low-pressure mercury-ray fluorescent lamps and neon lamp manufacturing industries, as a red component in low-voltage tricolor energy-saving lamps or as a single-color advertisement in outdoor neon lamps display; it can also...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 铁绍龙钟萍申俊英
Owner SOUTH CHINA NORMAL UNIVERSITY