a tb 3+ A new type of phosphor doped with gadolinium aluminum garnet

A technology of gadolinium aluminum garnet and fluorescent powder, which is applied in the field of fluorescent powder and its preparation, can solve the problems of low energy conversion efficiency, uneven product particle size, and low luminous intensity

Inactive Publication Date: 2017-12-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the continuous update of photoluminescent materials and the popularization and development of LED technology, the traditional LED light source has gradually been unable to meet the growing needs of people.
[0003] Currently widely used YAG (Y 3 al 5 o 12 ) phosphor powder (such as YAG: Tb 3+ Phosphor powder), there are problems such as low energy conversion efficiency, low luminous intensity, uneven product particle size, etc., thus limiting the development of LED technology

Method used

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  • a tb <sup>3+</sup> A new type of phosphor doped with gadolinium aluminum garnet
  • a tb <sup>3+</sup> A new type of phosphor doped with gadolinium aluminum garnet

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Effect test

Embodiment 1

[0017] a Tb 3+ Doped gadolinium aluminum garnet novel fluorescent powder, the preparation method is as follows:

[0018] Raw materials used: Gd 2 o 3 (99.99%), Tb 4 o 7 (99.99%), Al(NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0019] (1) Powdered Gd 2 o 3 and Tb 4 o 7 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0020] (2) Press Gd 3+ :Tb 3+ :Al 3+ Molar ratio 2.7: 0.3: 5 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;

[0021] (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;

[0022] (4) Pour the mixture obtained in step (2) into a pear-shaped funnel, and drop the mother salt solution into NH at a r...

Embodiment 2

[0026] A novel garnet-based high-efficiency green fluorescent powder, the preparation method of which is as follows:

[0027] Raw materials used: Gd 2 o 3 (99.99%), Tb 4 o 7 (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 and Tb 4 o 7 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0029] (2) Press Gd 3+ :Tb 3+ :Al 3+ Molar ratio 2.7: 0.3: 5 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;

[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 funnel, and drop the mother salt solution into NH at...

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Abstract

The invention discloses a Tb 3+ A novel phosphor doped with gadolinium aluminum garnet, whose chemical composition formula is (Gd 0.9 Tb 0.1 ) 3 Al 5 o 12 (GdAG:Tb 3+ ). The synthesis method of this phosphor powder is based on rare earth nitrate and Al(NO 3 ) 3 The solution is mixed stoichiometrically as a mother salt solution, with NH 4 HCO 3 As a precipitating agent, the suspension is obtained by reverse homogeneous precipitation. On this basis, the white precursor powder was obtained by centrifugation, washing, and drying, and finally calcined to obtain GdAG:Tb 3+ New Phosphor. The fluorescent powder prepared by the invention has excellent fluorescence performance, and is expected to become a new generation of lighting display materials.

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 a new type of green cold light source, light-emitting diode (LED) has the advantages of small size, high luminous intensity, low power consumption and long life, and is widely used in many fields such as lighting, display and traffic lights. With the continuous update of photoluminescent materials and the popularization and development of LED technology, the traditional LED light source has gradually been unable to meet the growing needs of people. [0003] Currently widely used YAG (Y 3 Al 5 o 12 ) phosphor powder (such as YAG: Tb 3+ Phosphor powder), there are problems such as low energy conversion efficiency, low luminous intensity, uneven product particle size, etc., thus limiting the development of LED technology. Therefore, it is of great significance to develop a new type of high-qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 李金凯滕鑫刘宗明段广彬
Owner UNIV OF JINAN
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