Fluorescent material capable of emitting strong red light and preparing method thereof

A fluorescent material and red light technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as low conversion efficiency, and achieve the effects of low production temperature, high emission intensity and uniform phase.

Inactive Publication Date: 2007-09-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention is aimed at the red fluorescent powder (Y 2 o 3 :Eu) the problem of low conversion efficiency, provide a fluorescent m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 100g lithium nitrate, 250.7g yttrium nitrate, 69.168g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), 0.38g of europium nitrate, 550.8g of urea and 964.5g of citric acid were dissolved in water, heated and stirred at 100°C for 40 minutes, and then sintered at 650°C for 40 minutes to obtain a white powdery fluorescent material.

Embodiment 2

[0022] Weigh 100g lithium nitrate, 250.7g yttrium nitrate, 69.168g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), 7.60g of europium nitrate, 5.96g of dysprosium nitrate, 561.6g of urea and 655.6g of citric acid were dissolved in water, heated at 120°C for 35 minutes, and then sintered at 750°C for 25 minutes to obtain a white powdery fluorescent material .

Embodiment 3

[0024] Weigh 100g lithium nitrate, 250.7 yttrium nitrate, 69.168g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O), 7.60g of europium nitrate, 5.39g of lanthanum nitrate, 599.0g of urea and 786.8g of citric acid were dissolved in water, heated at 150°C for 30 minutes, and then sintered at 850°C for 15 minutes to obtain a white powdery fluorescent material .

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PUM

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Abstract

The invention provides a fluorescent material of strong red light emission, and the chemical formula of the fluorescent material is LiYZrO:Eu3+, R3+, in which, R is representative of the mixture of one / two kinds of rare earth ions or one / two kinds of transition metal ions or any two kind of B (B3 +) or rare-earth ions, transition metal ions and B. The preparation of the fluorescent material is that it dissolves any one / two kinds of lithium nitrate, yttrium nitrate, zirconium nitrate, Eu nitrate, and rare metal nitrate, transition metal compounds and boric acid in the deionized water, and then it adds the related nitrate and citric acid, and then it stirs the dissolved solution and heats the solution to achieve the material.

Description

technical field [0001] The invention relates to a fluorescent material emitting strong red light and a preparation method thereof, belonging to the technical field of luminescent materials. technical background [0002] In 1993, Nichia took the lead in making a breakthrough in the blue GaN LED technology and industrialized it. In 1996, it developed a white LED. The specific method is to use yellow-emitting yttrium aluminum garnet (YAG) phosphor Combined with blue LEDs to obtain a high-efficiency white light source, it was launched on the market in 1998. Compared with traditional lighting sources, white LEDs have many advantages, such as: small size, low energy consumption, fast response, long life, no pollution, etc., so they are called the fourth generation of lighting sources. The many advantages of white LED make it have a huge future lighting market and significant energy-saving prospects. [0003] According to the principles of luminescence and colorimetry, there are ...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 吕孟凯邱子凤周媛媛张爱玉马谦
Owner SHANDONG UNIV
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