White-light fluorescent powder and preparation method thereof

A fluorescent powder and white light technology, applied in chemical instruments and methods, luminescent materials, climate sustainability, etc., can solve the problems of grain damage, uneven mixing, etc., to ensure uniformity and grain integrity, white light The effect of high quality and avoiding agglomeration

Active Publication Date: 2020-12-18
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Early white phosphors are usually mixed with red powder (yttrium europium oxide), green powder (phosphate, aluminate and borate, etc.) and blue powder (phosphate, aluminate and borate, etc.), and The preparation of these materials requires high-temperature sintering, grinding, mixing, screening and other processes, and there are situations such as uneven mixing and grain damage.

Method used

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  • White-light fluorescent powder and preparation method thereof
  • White-light fluorescent powder and preparation method thereof
  • White-light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare KY 0.99 (CO 3 ) 2 :0.01Ce 3+ Blue Violet Phosphor Powder

[0027] 1) Will weigh 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0028] 2) Weigh a total of 1 mmol of Y(NO 3 ) 3 ·6H 2 O and Ce(NO 3 ) 3 ·6H 2 O raw material, dissolved in 5mL deionized water, set aside;

[0029] 3) Add the mixed aqueous solution prepared in step 2 dropwise into the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0030] 4) Adjust the pH value of the mixed solution to 9 with dilute nitric acid;

[0031] 5) Pour the stirred mixed solution into the reaction kettle and heat at 200°C for 12h.

[0032] 6) After the reaction kettle is naturally cooled, wash the precipitate with alcohol and deionized water, and place the obtained precipitate in 80 ℃ Dry in an oven for 5 hours until completely dry to obtain the target product.

Embodiment 2

[0034] On the basis of blue-violet light phosphor, prepare KY 0.982 (CO 3 ) 2 :0.01Ce 3+ ,0.008Tb 3+ White phosphor

[0035] 1) Will weigh 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0036] 2) Weigh a total of 1 mmol of Y(NO 3 ) 3 ·6H 2 O, Tb(NO 3 ) 3 ·6H 2 O and Ce(NO 3 ) 3 ·6H 2 O raw material, dissolved in 5mL deionized water, set aside;

[0037] 3) Add the mixed aqueous solution prepared in step 2 dropwise into the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0038] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0039] 5) Pour the stirred mixed solution into the reaction kettle and heat at 200°C for 12h.

[0040] 6) After the reaction kettle is naturally cooled, wash the precipitate with alcohol and deionized water, and place the obtained precipitate in 80 ℃ Dry in an oven for 5 hours until completely dry to obtain the target product.

Embodiment 3

[0042] Prepare KY 0.987 (CO 3 ) 2 :0.005Ce 3+ ,0.008Tb 3+ White phosphor

[0043] 1) Will weigh 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0044] 2) Weigh a total of 1 mmol of Y(NO 3 ) 3 ·6H 2 O, Tb(NO 3 ) 3 ·6H 2 O and Ce(NO 3 ) 3 ·6H 2 O raw material, dissolved in 5mL deionized water, set aside;

[0045]3) Add the mixed aqueous solution prepared in step 2 dropwise into the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0046] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0047] 5) Pour the stirred mixed solution into the reaction kettle and heat at 200°C for 12h.

[0048] 6) After the reaction kettle is naturally cooled, wash the precipitate with alcohol and deionized water, and place the obtained precipitate in 80 ℃ Dry in an oven for 5 hours until completely dry to obtain the target product.

[0049] The preparation method of the fluorescent powder ...

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Abstract

The invention discloses a white-light fluorescent powder and a preparation method thereof. The general chemical formula of the fluorescent powder is KY1-x-y(CO3)2:xCe<3+>, yTb<3+>. When the content of03+ is zero, blue-violet light is emitted under the irradiation of ultraviolet light; when Ce<3+> and Tb<3+> in the fluorescent powder meet a certain proportion, the fluorescent powder can emit whitelight under the excitation of ultraviolet light; the light emitting spectrum of the fluorescent powder contains rich spectral components such as purple light, blue light, green light, red light and the like, the light emitting quality of white light is high, and meanwhile, compared with combined emission of various fluorescent powder, the fluorescent powder can ensure the light emitting uniformitywithout a physical mixing process of multi-color fluorescent powder in the fluorescent powder for realizing white light emission, the technological process is greatly simplified, the particle size uniformity of the fluorescent powder can be guaranteed through one-time preparation, and the use convenience of the fluorescent powder is improved; the preparation method is simple, uniform in light emitting and rich in spectral components, and can be widely applied to the fields of decoration, counterfeiting prevention, illumination and the like.

Description

technical field [0001] The invention belongs to the technical field of rare earth ion luminescence, and relates to a white light phosphor and a preparation method thereof. Background technique [0002] In the research of white light phosphors, the emission spectrum usually takes the spectrum of sunlight as the reference object. The emission spectrum of high-quality phosphors needs to contain rich visible spectrum components such as violet, blue, green and red. These phosphors have high color rendering and high-quality emitted white light. [0003] Early white phosphors are usually mixed with red powder (yttrium europium oxide), green powder (phosphate, aluminate and borate, etc.) and blue powder (phosphate, aluminate and borate, etc.), and The preparation of these materials requires processes such as high-temperature sintering, grinding, mixing, and screening, and there are situations such as uneven mixing and grain damage. In order to solve such problems, the current rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
CPCC09K11/7766Y02B20/00
Inventor 李德川朱光平方振国赵雪莲
Owner HUAIBEI NORMAL UNIVERSITY
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