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Dy3+ doping enhanced Tb3+ emission fluorescence powder

A phosphor, 3al5o12 technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low theoretical density, low energy conversion efficiency, and uneven particle size distribution.

Active Publication Date: 2015-12-30
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the development of preparation technology and the advancement of science and technology, the traditional YAG-based fluorescent materials have gradually been unable to meet people's needs.
[0003] Currently used YAG-based fluorescent materials (such as YAG:Tb 3+ ) has many problems, such as low energy conversion efficiency, uneven particle size distribution, low theoretical density, etc.
Such problems limit the development of this type of phosphor in lighting display and other fields

Method used

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  • Dy3+ doping enhanced Tb3+ emission fluorescence powder
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0026] A Dy 3+ Doping enhanced Tb 3+ Emitting fluorescent powder, the preparation method is as follows:

[0027] Raw materials used: Gd 2 o 3 (99.99%), Tb 4 o 7 (99.99%), Dy 2 o 3 (99.99%), Al(NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0028] (1) Powdered Gd 2 o 3 , Tb 4 o 7 and Dy 2 o 3 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0029] (2) Press (Gd 0.9-x Tb 0.1 Dy x ) 3 Al 5 o 12 (x=0) The stoichiometric ratio measures rare earth nitrate, Al(NO 3 ) 3 Solution, add deionized water to make a solution with a volume of 100mL, stir for 30min, so that the mother salt solution is evenly mixed;

[0030] (3) Weigh an appropriate amount of NH 4 HCO 3 Dissolve in deionized water, place in a constant temperature water bath, adjust the temperature to 25°C and stir until NH 4 HCO 3 dissolve;

[0031] (4) Pour the mixture obtained in step (2) into a pear-shaped funne...

Embodiment 3

[0035] A Dy 3+ Doping enhanced Tb 3+ Emitting fluorescent powder, the preparation method is as follows:

[0036] Raw materials used: Gd 2 o 3 (99.99%), Tb 4 o 7 (99.99%), Dy 2 o 3 (99.99%), Al(NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0037] (1) Powdered Gd 2 o 3 , Tb 4 o 7 and Dy 2 o 3 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0038] (2) Press (Gd 0.9-x Tb 0.1 Dy x ) 3 Al 5 o 12 (x=0.01) stoichiometric ratio to measure rare earth nitrate, Al(NO 3 ) 3 Solution, add deionized water to make a solution with a volume of 100mL, stir for 30min, so that the mother salt solution is evenly mixed;

[0039] (3) Weigh an appropriate amount of NH 4 HCO 3 Dissolve in deionized water, place in a constant temperature water bath, adjust the temperature to 25°C and stir until NH 4 HCO 3 dissolve;

[0040] (4) Pour the mixture obtained in step (2) into a pear-shaped funn...

Embodiment 4

[0044] A Dy 3+ Doping enhanced Tb 3+ Emitting fluorescent powder, the preparation method is as follows:

[0045] Raw materials used: Gd 2 o 3 (99.99%), Tb 4 o 7 (99.99%), Dy 2 o 3 (99.99%), Al(NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0046] (1) Powdered Gd 2 o 3 , Tb 4 o 7 and Dy 2 o 3 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0047] (2) Press (Gd 0.9-x Tb 0.1 Dy x ) 3 Al 5 o 12 (x=0.02) stoichiometric ratio to measure rare earth nitrate, Al(NO 3 ) 3 Solution, add deionized water to make a solution with a volume of 100mL, stir for 30min, so that the mother salt solution is evenly mixed;

[0048] (3) Weigh an appropriate amount of NH 4 HCO 3 Dissolve in deionized water, place in a constant temperature water bath, adjust the temperature to 25°C and stir until NH 4 HCO 3 dissolve;

[0049] (4) Pour the mixture obtained in step (2) into a pear-shaped funn...

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Abstract

The invention discloses Dy3+ doping enhanced Tb3+ emission fluorescence powder. The chemical composition formula of the Dy3+ doping enhanced Tb3+ emission fluorescence powder is (Gd0.875Tb0.1Dy0.025)3Al5O12((Gd0.875Tb0.1Dy0.025)AG). A synthetic method of the fluorescence powder comprises the steps that rare earth nitrate and a Al(NO3)3 solution are mixed according to a stoichiometric ratio to form a mother salt solution, NH4HCO3 is used as a precipitator, and turbid liquid is obtained through a reverse homogeneous precipitation method. On the basis, white precursor powder is obtained through centrifugation, cleaning and drying, and finally (Gd0.875Tb0.1Dy0.025) AG pomegranate groundmass fluorescence particles are obtained through sintering. The obtained fluorescence powder is excellent in fluorescence performance, and is expected to become a novel fluorescence material to be widely applied in the fields of illumination display and the like.

Description

technical field [0001] The invention relates to a fluorescent powder used in the fields of illumination and display and a preparation method thereof. Background technique [0002] As an important branch of inorganic light-emitting materials, garnet-based fluorescent materials have made great progress in recent years, especially the fluorescent materials of the yttrium aluminum garnet (YAG) system have gradually matured, and are widely used in LED lighting and display, medical imaging and other fields . However, with the development of preparation technology and the advancement of science and technology, the traditional YAG-based fluorescent materials have gradually been unable to meet people's needs. [0003] Currently used YAG-based fluorescent materials (such as YAG:Tb 3+ ) has many problems, such as low energy conversion efficiency, uneven particle size distribution, and low theoretical density. Such problems limit the development of this type of phosphor in lighting d...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 滕鑫刘宗明李金凯段广彬侯青月
Owner UNIV OF JINAN
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