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Preparation method of fluorescent compound

A technology for fluorescent compounds and mixtures, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of irregular product morphology, uneven particle size distribution, material oxidation and deterioration, and achieve good particle consistency and high fluorescence conversion efficiency. , the effect of high brightness

Inactive Publication Date: 2017-07-07
XINXIANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different calcination temperatures may produce different phases. The calcination atmosphere may introduce impurity ions and oxidize and deteriorate the material. The solid phase method has high synthesis temperature, irregular product appearance, uneven composition, easy entrainment of impurities, and uneven particle size distribution. , Particle size is difficult to control and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a fluorescent compound includes the following steps:

[0028] S1. Weigh 0.01 parts of terbium soluble salt solution, 4 parts of lanthanum soluble salt and 3 parts of europium soluble salt and mix them in an Erlenmeyer flask, add 10 parts of deionized water, and stir evenly to obtain solution A;

[0029] S2. Weigh tetrabutyl titanate, dissolve it in alcohol solvent, add soluble acid dropwise, and mix well to obtain solution B;

[0030] S3. Weigh 0.5 part of chemical resistance modifier, 0.2 part of flame retardant synergist, and 0.5 part of brominated flame retardant, dissolve it in alcohol solvent, mix evenly, and obtain solution C;

[0031] S4. After mixing and stirring solution B and solution C evenly, slowly pour into solution A, stir for 1-2h, heat to 50-100℃, keep for 1-6h, and obtain gel D;

[0032] S5. Place the obtained gel D in a corundum crucible, and calcinate in a muffle furnace for 2-4 hours under an air atmosphere at a calcination temperature ...

Embodiment 2

[0034] A method for preparing a fluorescent compound includes the following steps:

[0035] S1. Weigh 0.09 parts of terbium soluble salt solution, 4 parts of lanthanum soluble salt and 3 parts of europium soluble salt and mix them in an Erlenmeyer flask, add 10 parts of deionized water, and stir evenly to obtain solution A;

[0036] S2. Weigh tetrabutyl titanate, dissolve it in alcohol solvent, add soluble acid dropwise, and mix well to obtain solution B;

[0037] S3. Weigh 2.5 parts of chemical resistance modifier, 0.6 part of flame retardant synergist, and 0.8 part of bromine-based flame retardant, dissolve in alcohol solvent, mix evenly to obtain solution C;

[0038] S4. After mixing and stirring solution B and solution C evenly, slowly pour into solution A, stir for 1-2h, heat to 50-100℃, keep for 1-6h, and obtain gel D;

[0039] S5. Place the obtained gel D in a corundum crucible, and calcinate in a muffle furnace for 2-4 hours under an air atmosphere at a calcination temperature o...

Embodiment 3

[0041] A method for preparing a fluorescent compound includes the following steps:

[0042] S1. Weigh 0.05 parts of terbium soluble salt solution, 4 parts of lanthanum soluble salt and 3 parts of europium soluble salt and mix them in an Erlenmeyer flask, add 10 parts of deionized water, and stir evenly to obtain solution A;

[0043] S2. Weigh tetrabutyl titanate, dissolve it in alcohol solvent, add soluble acid dropwise, and mix well to obtain solution B;

[0044] S3. Weigh 1.5 parts of chemical resistance modifier, 0.4 part of flame retardant synergist, and 0.65 part of bromine-based flame retardant, dissolve in alcohol solvent, mix evenly, and obtain solution C;

[0045] S4. After mixing and stirring solution B and solution C evenly, slowly pour into solution A, stir for 1-2h, heat to 50-100℃, keep for 1-6h, and obtain gel D;

[0046] S5. Place the obtained gel D in a corundum crucible, and calcinate in a muffle furnace for 2-4 hours under an air atmosphere at a calcination temperatur...

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Abstract

The invention discloses a preparation method of a fluorescent compound. The method comprises the following steps that a soluble salt solution, a soluble salt and a soluble salt are weighed according to the proportion and mixed and dissolved in deionized water, stirring is conducted to be uniform, and a solution A is obtained; tetrabutyl titanate is weighed and dissolved in an alcohol solvent, soluble acid is dropwise added, mixing is conducted to be uniform, and a solution B is obtained; a chemical resistant modifier, flame retardant synergist and brominated flame retardant are weighed according to a proportion and dissolved in an alcohol solvent, mixing is conducted to be uniform, and a solution C is obtained; after the solution B and the solution C are mixed and stirred to be uniform, the mixture is slowly poured into the solution A, stirring, heating and heat preservation are conducted, and gel D is obtained; the obtained gel D is put into a corundum crucible, in an air atmosphere, calcination and heat preservation are conducted, and the fluorescent compound is obtained. According to the preparation method, obtained fluorescent powder is high in brightness, uniform in powder particle size, uniform in dispersion, regular in particle shape, good in particle consistency and high in fluorescence conversion efficiency, and the obtained material has good flame retardance and corrosion resistance.

Description

Technical field [0001] The invention relates to the field of material preparation, in particular to a method for preparing a fluorescent compound. Background technique [0002] White LED has high efficiency, energy saving, long life, and environmental protection, but the price is relatively high, and the technology is not mature. In particular, white LED phosphors have imperfect aspects in terms of light conversion characteristics, thermal stability, and light decay characteristics. Especially for my country, there are very few phosphors with independent property rights, and the research of phosphors will be one of the focuses of the development of China's lighting industry. [0003] Among the three primary color white phosphors, green powder contributes the most to the luminous flux. At present, the green powder for the three primary colors is Tb 3+ As an activator, the maximum emission peak is located at 545nm, which belongs to Tb 3+ of 5 D 4 - 7 F 5 Jump. And the green phospho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86
CPCC09K11/7788
Inventor 刘丽霞黄倩倩靳平宁岳学静
Owner XINXIANG MEDICAL UNIV
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