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Dy < 3 + > doped 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 problems such as uneven mixing of fluorescent materials, affecting the stability of fluorescent materials, and damage to crystal grains, to achieve luminescence High quality, uniform powder particle size, and small effect of temperature effect

Active Publication Date: 2020-12-29
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In common preparation methods, these fluorescent materials are usually sintered at high temperature, and phosphor materials with a certain particle size are obtained by mixing, grinding and screening, etc., but the mixing and grinding process is easy to make the mixing of fluorescent materials uneven and Damaged crystal grains affect the luminescence stability of fluorescent materials

Method used

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  • Dy &lt; 3 + &gt; doped white light fluorescent powder and preparation method thereof
  • Dy &lt; 3 + &gt; doped white light fluorescent powder and preparation method thereof
  • Dy &lt; 3 + &gt; doped white light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare KY 0.995 (CO 3 ) 2 :0.005Dy 3+ Phosphor powder

[0029] 1) Will weigh 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0030] 2) Weigh a total of 1 mmol of Y(NO 3 ) 3 ·6H 2 O and Dy(NO 3 ) 3 ·6H 2 O raw material, dissolved in 5mL deionized water, set aside;

[0031] 3) Add the mixed aqueous solution prepared in step 2 dropwise into the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0032] 4) Adjust the pH value of the mixed solution to 9 with dilute nitric acid;

[0033] 5) Pour the stirred mixed solution into the reaction kettle and heat at 200°C for 12h.

[0034] 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

[0036] Prepare KY 0.99 (CO 3 ) 2 :0.01Dy 3+ Phosphor powder

[0037] 1) Will weigh 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0038] 2) Weigh a total of 1 mmol of Y(NO 3 ) 3 ·6H 2 O and Dy(NO 3 ) 3 ·6H 2 O raw material, dissolved in 5mL deionized water, set aside;

[0039] 3) Add the mixed aqueous solution prepared in step 2 dropwise into the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0040] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0041] 5) Pour the stirred mixed solution into the reaction kettle and heat at 200°C for 12h.

[0042] 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

[0044] Prepare KY 0.9 (CO 3 ) 2 :0.1Dy 3+ Phosphor powder

[0045] 1) Will weigh 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0046] 2) Weigh a total of 1 mmol of Y(NO 3 ) 3 ·6H 2 O and Dy(NO 3 ) 3 ·6H 2 O raw material, dissolved in 5mL deionized water, set aside;

[0047] 3) Add the mixed aqueous solution prepared in step 2 dropwise into the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0048]4) Adjust the pH value of the mixed solution to 10 with dilute nitric acid;

[0049] 5) Pour the stirred mixed solution into the reaction kettle and heat at 200°C for 12h.

[0050] 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.

[0051] The preparation method of the fluorescent powder in comparative example 1,2 and 3, in embo...

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Abstract

The invention discloses Dy < 3 + > doped white light fluorescent powder and a preparation method thereof, the chemical general formula of the fluorescent powder is KY<1-x> (CO<3>)<2>: xDy<3+>, and 0<x< 0.3. When the content of Dy < 3 + > in KY<1-x> (CO<3>)<2>: xDy<3+> is 0, the substance KY (CO3) 2 does not emit light; when a luminescence center Dy < 3 + > is introduced into KY (CO3) 2, KY<1-x> (CO<3>)<2>: xDy<3+> emits white light under the irradiation of ultraviolet light; the effective excitation wavelengths of the white-light fluorescent powder are 325nm, 351nm, 365nm, 386nm and the like,and the optimal excitation wavelengths of the white-light fluorescent powder are 351nm and 368nm. When the fluorescent powder is excited, visible light components of blue light (peak wavelength 483 nm), yellow light (peak wavelength 578 nm) and red light (666 nm and 756 nm) exist in an emission spectrum of the fluorescent powder. Compared with white-light fluorescent powder with the synergistic effect of various light-emitting ions, Dy3 + ions in the matrix can absorb and emit photons at the same time, losses in the photon energy transfer process are reduced, and high energy utilization efficiency is achieved; the fluorescent powder is simple in preparation method 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 present invention relates to a Dy 3+ The doped white light fluorescent powder and its preparation method belong to the technical field of rare earth ion luminescence. Background technique [0002] In the research of white light phosphors, oxides, phosphates, aluminates and silicates doped with transition metal ions and rare earth ions are usually prepared by solid-state reaction method. Under the doping of two or more luminescent ions, the fluorescence emission spectra of these systems contain as many visible light spectrum components as possible, and the white light emission quality is high. [0003] In common preparation methods, these fluorescent materials are usually sintered at high temperature, and phosphor materials with a certain particle size are obtained by mixing, grinding and screening, etc., but the mixing and grinding process is easy to make the mixing of fluorescent materials uneven and The crystal grains are damaged, which affects...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7767H01L33/502Y02B20/00
Inventor 李德川朱光平方振国赵雪莲
Owner HUAIBEI NORMAL UNIVERSITY
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