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Eu<2+> and Eu<3+> europium ion mixed activated fluorescent powder, preparation method and application

A europium ion and phosphor technology, applied in the field of inorganic light-emitting materials, can solve the problems of unreported multi-color light-emitting phosphors, and achieve the effects of good physical and chemical properties, thermal stability, good structural rigidity and low cost.

Active Publication Date: 2018-11-16
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But currently, in Eu 2+ and Eu 3+ Europium ion mixed activated with Na 2 Al 2 B 4 o 10 There is no report on the multi-color luminescent phosphor as the host material

Method used

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  • Eu&lt;2+&gt; and Eu&lt;3+&gt; europium ion mixed activated fluorescent powder, preparation method and application
  • Eu&lt;2+&gt; and Eu&lt;3+&gt; europium ion mixed activated fluorescent powder, preparation method and application
  • Eu&lt;2+&gt; and Eu&lt;3+&gt; europium ion mixed activated fluorescent powder, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the chemical formula Na 1.94 Eu 0.06 al 2 B 4 o 10 The stoichiometric ratio of each cationic element in the formula was weighed respectively for the reactant raw materials: sodium nitrate NaNO3: 1.65 grams, europium nitrate Eu(NO3)3 6H2O: 0.268 grams, aluminum nitrate Al(NO3) 3 9H2O: 7.5 grams, boric acid H3BO3: 2.48 grams, respectively dissolve them in dilute nitric acid, add appropriate amount of deionized water, weigh appropriate amount of complexing agent citric acid, add 1.19 grams of citric acid to each solution, and magnetically stir in a water bath at 70 °C Obtain a clear solution, then mix each reaction solution evenly, place in an oven, and dry to obtain a precursor; then place the precursor in a muffle furnace for calcination at a sintering temperature of 700°C for 10 hours and cool to room temperature , take out and fully grind to get the sample, its structural formula is Na 1.94 Eu 0.06 al 2 B 4 o 10 .

[0026] See attached figure 1 ...

Embodiment 2

[0031] According to the chemical formula Na 1.98 Eu 0.02 Al 2 B 4 o 10 The stoichiometric ratio of each cationic element in the medium is weighed respectively for sodium carbonate Na 2 CO 3 : 1.05 g, europium nitrate Eu (NO 3 ) 3 •6H 2 O: 0.01 g, aluminum nitrate Al(NO 3 ) 3 •9H 2 O: 7.5 g, boric acid H 3 BO 3 : 2.48 grams, take an appropriate amount of complexing agent citric acid, dissolve the above reagents in dilute nitric acid respectively, and add an appropriate amount of deionized water, then add 1.656 grams of citric acid, and magnetically stir in a water bath at 90 ° C to obtain a clear solution; Mix the obtained reaction solution and place it in an oven, dry it to obtain the precursor, put the precursor in a muffle furnace for calcination, the sintering temperature is 850°C, the calcination time is 3 hours, cool to room temperature, take it out and grind it thoroughly A sample is obtained. Its structural properties, excitation spectrum and embodiment 1 ...

Embodiment 3

[0034] According to the chemical formula Na 1.998 Eu 0.002 Al 2 B 4 o 10 The stoichiometric ratio of each cationic element in the medium, respectively weigh sodium nitrate NaNO 3 : 1.69 g, europium oxide Eu 2 o 3 : 0.004 g, aluminum hydroxide Al(OH) 3 : 1.56 g, boron trioxide B 2 o 3 : 1.4 grams, the above reagents were dissolved in dilute nitric acid, added appropriate amount of deionized water, and 1.6 grams of citric acid was added, magnetically stirred in a water bath at 80 ° C to obtain a clear solution; the reaction solutions were mixed and placed in an oven, The precursor was obtained by drying, and the precursor was calcined in a muffle furnace at a sintering temperature of 800°C for 5 hours, cooled to room temperature, taken out and fully ground to obtain a sample.

[0035] The structure, property and excitation spectrum of the sample prepared in this example are similar to Example 1.

[0036] See attached Figure 6 , is the fluorescence spectrum of the sam...

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Abstract

The invention discloses Eu<2+> and Eu<3+> europium ion mixed activated fluorescent powder, a preparation method and an application, and belongs to the technical field of luminescent materials. The chemical formula of the fluorescent powder is Na(2-2x)Eu2xAl2B4O10, wherein x is the doping mole number of europium ions, x is larger than or equal to 0.001 and smaller than or equal to 0.07, the matrixis Na2Al2B4O10, an activator is europium ions and is a coexistence mixture of Eu<2+> and Eu<3+>. The fluorescent powder is prepared with a chemical sol-gel synthesis method, and sintering is performedin an air atmosphere. Under excitation of ultraviolet light and near ultraviolet light, fluorescent powder can obtain different luminous colors from blue light to white light. The preparation processis simple, especially the requirement for the sealing property of preparation equipment is not high, production safety is good, the cost is low, no pollution is discharged, and the obtained fluorescent powder is polychromatic and luminous and the color is continuous and adjustable.

Description

technical field [0001] The present invention relates to a kind of Eu 2+ and Eu 3+ The invention relates to a fluorescent material activated by mixed europium ions, a preparation method and an application thereof, belonging to the technical field of inorganic luminescent materials. Background technique [0002] Luminescence is the most prominent function among the three major functions of light, electricity and magnetism of rare earth compounds, and has attracted great attention from people. Rare earth luminescent materials are mainly composed of matrix and rare earth ion activators. Rare earth luminescent materials have excellent properties, for example, the electronic lifetime of the excited state is much longer than that of ordinary atoms, the spectral line width is narrow, and the fluorescence emission wavelength can be tuned. [0003] Among rare earth ions, europium ion Eu is one of the most important activators, and has two valence states of +3 and +2 at the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/80
CPCC09K11/774
Inventor 黄彦林米龙庆魏东磊
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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