Blue-fluorescence luminescent material and method for making same

A luminescent material, blue fluorescent technology, applied in the field of fluorescent materials, can solve the problems of pollution and high cost, achieve the effect of cost reduction and large-scale application

Inactive Publication Date: 2008-01-30
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These halophosphate and borophosphate luminescent materials not only have the problem of high cost, but also due to the existence of halogen elements in the material matrix, there is a certain pollution in the process of material preparation and device use, and various display and lighting There are certain problems in the anti-aging performance, thermal stability and chemical stability of the luminescent powder of the device, and the quality, luminous efficiency and powder control process of the luminescent material need to be improved

Method used

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  • Blue-fluorescence luminescent material and method for making same
  • Blue-fluorescence luminescent material and method for making same

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh sodium carbonate Na 2 CO 3 :1.59g, strontium carbonate SrCO 3 :5.94g, barium carbonate BaCO 3 :7.89g, ammonia dihydrogen phosphate NH 4 H 2 (PO 4 ): 3.195g, after grinding and mixing uniformly, select air atmosphere for the first calcination, the temperature is 450℃, the calcination time is 1.5 hours, then cool to room temperature, and take out the sample.

[0035] Adding Europium Oxide (Eu) to the raw materials for the first calcination 2 O 3 :0.0528g, again mix and grind the mixture well, and sinter it for the second time at 700℃ in a reducing atmosphere such as hydrogen or nitrogen-hydrogen mixture. The sintering time is 5 hours, and it is cooled to room temperature to obtain a powder. A blue fluorescent luminescent material doped with rare earth ion europium strontium barium sodium phosphate.

[0036] The sample obtained in this embodiment is excited under vacuum ultraviolet light to obtain blue fluorescence.

[0037] Refer to Figure 1, which is a comparison betwe...

Embodiment 2

[0042] Weighing out sodium carbonate Na 2 CO 3 :1.590 grams, strontium carbonate SrCO 3 :3.100g, barium carbonate BaCO 3 :1.776 g, ammonia dihydrogen phosphate NH 4 H 2 (PO 4 ): 3.195g, after grinding and mixing uniformly, select the first calcination in air atmosphere, the temperature is 500℃, the pre-sintering time is 2 hours, and it is cooled to room temperature. Take out the sample and add Europium Oxide Eu at this time 2 O 3 :0.108g, again fully ground and mixed uniformly, the second calcination, in the reducing atmosphere of carbon monoxide gas, sintering at 720 ℃ for 6 hours, then the divalent rare earth Eu 2+ The activated blue luminescent powder, the main structural properties, excitation spectrum and luminescence spectrum are similar to those in Example 1.

Embodiment 3

[0044] According to the ratio of the elements in the expression, weigh the sodium carbonate Na 2 CO 3 :1.0812g, barium carbonate BaCO 3 :3.947g, ammonia dihydrogen phosphate NH 4 H 2 (PO 4 ): 2.3466 g, after grinding and mixing uniformly, calcination in air atmosphere, first pre-sintering at 480°C for 1 hour, cool to room temperature, take out the sample, add europium oxide at this time 2 O 3 :0.018g, fully grind again and mix evenly, in a reducing atmosphere such as nitrogen (add activated carbon), carbon monoxide gas, hydrogen or nitrogen-hydrogen mixture, sinter for the second time at 750℃, and the sintering time is 5 hours, you can get Rare Earth Eu 2+ Activated blue glowing luminescent powder. The main structural properties, excitation spectrum and luminescence spectrum are similar to those in Example 1.

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Abstract

The invention relates to a blue fluorescence luminescent material and a preparation method thereof, pertaining to the technical field of luminescent material. The technic proposal adopted by the invention is to prepare strontium phosphate barium stone, of which a chemical formula is M(Srx, Ba1-x)PO4:Eu, wherein, M is equal to Li+, Na+, K+, Rb+, x is equal to 0-1, doping content of rare earth element europium (Eu2+) is 0.0005-10 percent mol of the total amount of strontium and barium. An excitation field of the invention tallies closely with vacuum uv (VUV) generated by ionomer such as mixed gas of xenon and ne (Xe plus Ne) which is applied presently. Excited by vacuum uv less than 200nm, the invention emits blue fluorescence; the invention has high crystallinity, good luminescent quality, low cost, simple preparation technique and no pollution and is especially applicable to ionomer plate displaying technology and luminescent and displaying devices with vacuum uv as an excitation source, such as a noble gas discharge lamp, etc.

Description

Technical field [0001] The invention relates to a blue fluorescent light-emitting material and a preparation method thereof, in particular to a fluorescent powder that emits blue fluorescence under vacuum ultraviolet light excitation and a preparation method thereof, which can be applied to plasma flat panel display technology (PDP) , It belongs to the technical field of fluorescent materials. Background technique [0002] The use of rare gas discharge can obtain vacuum ultraviolet light (VUV) with a wavelength range of 100-200nm. In modern display technology, light-emitting devices using VUV as an excitation light source have received extensive attention and applications. For example, various rare gas discharge lamps, plasma flat panel display PDP devices, etc., using rare gas discharge to emit light, PDP display technology can display various information with high precision and high density, and can also prepare large screens and ultra-thin Display devices, with the advent and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81
Inventor 黄彦林王锡刚秦大可张英姜传芳
Owner SUZHOU UNIV
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