Eu<3+> ion activated aluminophosphate fluorescent ceramic, and preparation method and application thereof

A technology of fluorescent ceramics and aluminophosphates, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of complex steps, low luminous efficiency, impure chromaticity, etc., and achieves convenient operation, simple synthesis process, Effects with low equipment requirements

Active Publication Date: 2020-05-12
XUZHOU NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effective excitation range of existing red fluorescent ceramics is mostly in the short-wave UV region, and its luminous efficiency under ultraviolet light excitation is low, the chromaticity is not pure, and the preparation method is long, the steps are complicated, and the operation is difficult.

Method used

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  • Eu&lt;3+&gt; ion activated aluminophosphate fluorescent ceramic, and preparation method and application thereof
  • Eu&lt;3+&gt; ion activated aluminophosphate fluorescent ceramic, and preparation method and application thereof
  • Eu&lt;3+&gt; ion activated aluminophosphate fluorescent ceramic, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] According to Li 9 Al 2.7 Eu 0.3 P 8 o 29 The stoichiometric ratio of Li, Al, Eu, P in Li, Al, Eu, P, respectively weigh lithium carbonate Li 2 CO 3 : 3.321 g, aluminum oxide Al 2 o 3 : 1.377 g, europium oxide Eu 2 o 3 : 0.528 g and monoammonium phosphate NH 4 h 2 PO 4 : 9.2 g. Add acetone to the weighed raw materials for wet grinding, so as to mix evenly, and the obtained mixture is calcined for the first time under the air atmosphere, the calcining temperature is 750 ° C, and the calcining time is 1 hour; the calcined samples are ground evenly, and the calcined samples are Calcination for the second time, the calcination temperature is 850°C, and the calcination time is 4 hours to obtain a Eu 3+ Ion-activated red fluorescent ceramics.

[0025] See attached figure 1 , is the X-ray ceramic powder diffraction pattern of the sample prepared by the technical scheme of Example 1. The XRD test results show that the prepared sample has a good crystallinity and i...

Embodiment 2

[0031] According to Li 9 Al 2.55 Eu 0.45 P 8 o 29 The stoichiometric ratios of Li, Al, Eu, and P in Li, Al, Eu, and P are respectively weighed lithium hydroxide LiOH: 2.155 grams, aluminum hydroxide Al(OH) 3 : 1.989 g, europium oxide Eu 2 o 3: 0.792 g, phosphoric acid H 3 PO 4 : 7.838 grams. Mix the weighed raw materials and add acetone for wet grinding, so as to mix evenly, and the obtained mixture is calcined for the first time under the air atmosphere, the calcining temperature is 300 ° C, and the calcining time is 7.5 hours; The second calcination, the calcination temperature is 1150 ° C, the calcination time is 2 hours, to obtain Eu 3+ Ion-activated red fluorescent ceramics.

[0032] The structure, morphology, excitation spectrum and emission spectrum of the fluorescent ceramic sample prepared in this example are similar to those in Example 1.

Embodiment 3

[0034] According to Li 9 Al 2.997 Eu 0.003 P 8 o 29 The stoichiometric ratio of Li, Al, Eu, P in Li, Al, Eu, P, respectively weigh lithium sulfate Li 2 SO 4 : 5.758 grams, aluminum nitrate Al (NO 3 ) 3 ·6H 2 O: 9.620 grams, europium nitrate Eu (NO 3 ) 3 ·6H 2 O: 1.338 g, phosphoric acid H 3 PO 4 : 7.838 grams. After mixing the weighed raw materials, add acetone for wet grinding, so as to mix uniformly, and the obtained mixture is calcined for the first time under air atmosphere, the calcining temperature is 450 ° C, and the calcining time is 3.5 hours; the calcined samples are ground uniformly, and the The second calcination under air atmosphere, the calcination temperature is 750°C, and the calcination time is 8 hours, to obtain a Eu 3+ Ion-activated red fluorescent ceramics.

[0035] The structure, morphology, excitation spectrum and emission spectrum of the fluorescent ceramic sample prepared in this example are similar to those in Example 1.

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Abstract

The invention relates to Eu<3+> ion activated aluminophosphate fluorescent ceramic, and a preparation method and an application thereof, belonging to the technical field of inorganic fluorescent ceramic materials. The Eu<3+> ion activated aluminophosphate fluorescent ceramic has a chemical general formula of Li9Al<3-3x>Eu<3x>P8O29, wherein x is a molar ratio of Eu<3+> that dopes and substitutes Al<3+>, and x is no less than 0.001 and no more than 0.15. The preparation method provided by the invention comprises the following steps: according to the stoichiometric ratio of elements in the chemical formula of Li9Al<3-3x>Eu<3x>P8O29, weighing compounds containing ions of the elements, respectively carrying out wet grinding on the weighed raw materials by using acetone as a grinding auxiliary agent, carrying out uniform mixing, and carrying out calcining twice so as to complete preparation. The synthesis method provided by the invention is simple in process, convenient to operate, low in equipment requirement, energy-saving and environmentally-friendly; and the prepared powder is high in luminous efficiency and good in stability. The red fluorescent ceramic activated by the Eu<3+> ionscan be widely applied to lighting and display devices.

Description

technical field [0001] The invention relates to the technical field of inorganic fluorescent materials, in particular to a Eu 3+ Ion-activated aluminophosphate fluorescent ceramics and its preparation method and application. Background technique [0002] With the aggravation of global environmental problems and energy shortage, energy conservation and environmental protection have become an important issue that people are currently facing. In the field of general lighting, white LED products have become the focus of attention. It is a new type of green and environmental protection lighting product, which has the advantages of high electro-optic efficiency, small size, low power, long life, etc. It is considered as a new generation of lighting source and has a good development trend. [0003] There are two main ways for white light LED to produce white light: the first is to combine red, green and blue LEDs to produce white light; the second is to use LED to excite light an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/447C04B35/50C09K11/81H01L33/50C04B35/64
CPCC04B35/447C04B35/50C09K11/7737H01L33/502C04B35/64C04B2235/3217C04B2235/3218C04B2235/443C04B2235/9646C04B2235/448C04B2235/442C04B2235/3203
Inventor 乔学斌许臣臣王胜家邢进
Owner XUZHOU NORMAL UNIVERSITY
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