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Synthesis of SrAl<2>O<4>:Dy<3+>/ Eu<2+> green steady persistence fluorescent material

A fluorescent material and long afterglow technology, applied in the direction of luminescent materials, chemical instruments and methods, etc.

Inactive Publication Date: 2019-11-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved in the present invention is to prepare a green long-lasting fluorescent material with a single emission peak by adjusting the doping concentration of Eu2+ and Dy3+ by using the ammonium bicarbonate co-precipitation method

Method used

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  • Synthesis of SrAl&lt;2&gt;O&lt;4&gt;:Dy&lt;3+&gt;/ Eu&lt;2+&gt; green steady persistence fluorescent material
  • Synthesis of SrAl&lt;2&gt;O&lt;4&gt;:Dy&lt;3+&gt;/ Eu&lt;2+&gt; green steady persistence fluorescent material

Examples

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example 1

[0017] a SrAl 2 o 4 : Dy 3+ / Eu 2+ The synthesis of green long afterglow fluorescent material, the preparation method comprises the following steps:

[0018] (1) The rare earth oxide (Dy 2 o 3 and Eu 2 o 3 ) is dissolved in hot nitric acid to form rare earth nitrate;

[0019] (2) Sr 2+ 、Al 3+ 、Dy 3+ and Eu 3+ Measure the rare earth nitrate with a molar ratio of 0.75:2:0.1:0.05, supplement it with deionized water to make the solution reach 100mL, mix well to obtain the mother salt;

[0020] (3) Take by weighing 23.88 g of ammonium bicarbonate, add deionized water to make the solution reach 200mL, and configure a certain concentration of ammonium bicarbonate solution;

[0021] (4) Add the mother salt of step 2 dropwise to the ammonium bicarbonate solution of step 3, after the dropwise addition, react at room temperature for 30 minutes;

[0022] (5) centrifuging, washing and drying the suspension after the reaction in step 4 to obtain a white precursor powder;

[00...

example 2

[0025] The difference between this implementation case and the implementation steps of Example 1 is that the Sr in step (2) 2+ 、Al 3+ 、Dy 3+ and Eu 3 + Molar ratio is changed into 0.7:2:0.2:0.1, and other conditions are all identical with example one.

example 3

[0027] The difference between this implementation case and the implementation steps of Example 1 is that the Sr in step (2) 2+ 、Al 3+ 、Dy 3+ and Eu 3 + Molar ratio is changed into 0.65:2:0.3:0.15, and other conditions are all identical with example one.

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Abstract

The invention discloses a synthesis method of a SrAl<2>O<4>:Dy<3+> / Eu<2+> green steady persistence fluorescent material. The chemical formula of the SrAl<2>O<4>:Dy<3+> / Eu<2+> green steady persistence fluorescent material is SrAl<2>O<4>:Dy<3+> / Eu<2+>; the steady persistence fluorescent powder is prepared through following steps: a mother salt is prepared through mixing of strontium nitrate, dysprosium nitrate, gadolinium nitrate, europium nitrate, and aluminum nitrate at a certain ratio, the mother salt is added drop by drop into a ammonium bicarbonate solution of a certain concentration, after adding, reaction is carried out for 30min, and then centrifugation, washing, and drying are carried out to obtain a precursor powder, and at last, calcining is carried out at reducing atmosphere to obtain the SrAl<2>O<4>:Dy<3+> / Eu<2+> green steady persistence fluorescent material. The SrAl<2>O<4>:Dy<3+> / Eu<2+> green steady persistence fluorescent material is excellent in fluorescent performance, and it is promising to achieve important effect in the field of illumination and cell display.

Description

technical field [0001] The invention relates to the preparation of a green long afterglow fluorescent material applied in the fields of illumination and display, which has a single fluorescent emission peak and has obvious afterglow phenomenon. Background technique [0002] Because long-lasting luminescent materials can release absorbed energy in the form of light, they are widely used in emergency lighting, instrument display, fire safety, architectural decoration, high-energy ray detection, non-destructive detection of engineering ceramics, fiber optic thermometers, and military facilities. Applications. With the development of science and technology, it is expected to be applied in new energy, life science, information processing and other scientific and technological fields in the near future. With the development of high technology, people put forward higher requirements on the luminous efficiency, stability and particle size of phosphors. Although aluminate-based lon...

Claims

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Application Information

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IPC IPC(8): C09K11/64
CPCC09K11/7792
Inventor 刘斌李金凯刘宗明
Owner UNIV OF JINAN
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