Method for preparing doped-cerium-terbium gamma-AlON radical luminous powder

A technology of luminescent powder and cerium terbium, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of insufficient reaction, excessive nitriding of powder, large grain size, etc., achieve excellent luminescence performance and avoid mixing of reactants The effect of uneven and uniform particle size distribution

Inactive Publication Date: 2011-04-20
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too high temperature during sintering will lead to excessive nitriding of the powder, too low temperature will cause incomplete nitriding reaction, too long holding time will cause large grains, too short reaction will not be sufficient

Method used

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  • Method for preparing doped-cerium-terbium gamma-AlON radical luminous powder
  • Method for preparing doped-cerium-terbium gamma-AlON radical luminous powder
  • Method for preparing doped-cerium-terbium gamma-AlON radical luminous powder

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: 45.455g Al(NO 3 ) 3 .H 2 O, 0.952mol / LTb(NO 3 ) 3 Solution 0.85ml, 5.4g urea CO(NH 2 ) 2 , and 4.5g PEG (molecular weight: 5000) were added into 300ml deionized water, and stirred at 80-90°C for 30min to obtain a transparent and uniform solution. 0.5g stearic acid (C 18 h 36 o 2 ), 6g ammonium bicarbonate (NH 4 HCO 3) and 0.384g (mass fraction: 5.9%) nano-carbon black (average particle size is about 18nm) were added to 200ml deionized water, and stirred at 150°C for 1h to obtain a stable suspension. Then slowly add the hydrolyzed solution of aluminum nitrate into the ammonium bicarbonate solution suspended with carbon black, and stir while adding. After all the drops are completed, continue to add ammonia water to adjust the pH value to 9, and continue to stir for half an hour. After that, the desired precursor precipitation can be obtained. After the precursor precipitate was aged at room temperature for 24 h, it was filtered, washed three time...

Embodiment 2

[0025] Example 2: 45.455g Al(NO 3 ) 3 .H 2 O, 0.952mol / LTb(NO 3 ) 3 Solution 0.85ml, 0.522mol / LCe(NO 3 ) 3 Solution 1.05ml, 5.4g urea CO(NH 2 ) 2 , and 4.5g PEG (molecular weight: 5000) were added into 300ml deionized water, and stirred at 80-90°C for 30min to obtain a transparent and uniform solution. Add 0.5g stearic acid, 6g ammonium bicarbonate and 0.384g (mass fraction: 5.9%) nano-carbon black (average particle size is about 18nm) into 200ml deionized water, stir at 150°C for 1h to obtain a stable suspension liquid. Then slowly add the hydrolyzed solution of aluminum nitrate into the ammonium bicarbonate solution suspended with carbon black, and stir while adding. After all the drops are completed, continue to add ammonia water to adjust the pH value to 9, and continue to stir for half an hour. After that, the desired precursor precipitation can be obtained. After the precursor precipitate was aged at room temperature for 24 h, it was filtered, washed three ti...

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Abstract

The invention relates to a method for preparing gamma-AlON radical ceramic luminous powder by using a co-precipitation method, belonging to the field of synthesis and preparation of phosphor powder materials. The method is characterized by comprising the following steps of: using aluminum nitrate, cerium nitrate, terbium nitrate, urea and nano carbon black as raw materials, using PEG as a dispersing agent, using ammonium bicarbonate and ammonia water as a precipitating agent, and precipitating and reacting to obtain a precursor; precipitating and washing the precursor, and grinding after drying; after processing for 2-4 hours under the nitrogen protection condition at 700 DEG C, keeping warm for 2-4 hours under the condition of nitrogen flow of 0.5L / min at 1750 DEG C; after naturally cooling in air, removing carbon under the condition of 700 DEG C, and finally obtaining AlON radical phosphor powder doped with Tb3+ / Ce3+luminous irons. The particle size of the powder is in the range of 1-2mu and is uniform. After the components are optimized, the AlON powder co-doped with Tb3+ / Ce3+ irons is excited to have good luminous properties under the condition of 275nm, and the luminous intensity is as ten times as that of AlON phosphor powder singly doped with Tb3.

Description

technical field [0001] The invention relates to a rapid preparation method of co-precipitation combined with carbothermal reduction of γ-AlON-based luminescent powder, which belongs to the technical field of phosphor material synthesis and preparation. Background technique [0002] In 1993, Nichia took the lead in using blue gallium nitride light-emitting diodes + yellow phosphor YAG:Ce to make white LED devices, and its power consumption was only 1 / 8 of incandescent lamps and 1 / 2 of fluorescent lamps. The service life can reach 100,000 hours (about 10 times that of fluorescent lamps). This new, energy-saving, long-life, all-solid-state white light source will become a research hotspot for a new generation of lighting sources in the early 21st century, and will gradually replace energy-consuming incandescent lamps and Fluorescent lamps polluted by mercury. Rare earth doping - Group nitrides AlN, GaN, InGaN and AlInGaN, because they can be better excited by blue light, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 施鹰邓莲芸林挺任玉英谢建军
Owner SHANGHAI UNIV
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