Bi<3+>-doped fluorescent powder for enhancing Ce<3+> yellow luminescence

A fluorescent powder and yellow light technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc.

Inactive Publication Date: 2019-07-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of preparation technology and the advancement of science and technology, traditional fluorescent materials have gradually been unable to meet people's needs.

Method used

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  • Bi&lt;3+&gt;-doped fluorescent powder for enhancing Ce&lt;3+&gt; yellow luminescence
  • Bi&lt;3+&gt;-doped fluorescent powder for enhancing Ce&lt;3+&gt; yellow luminescence
  • Bi&lt;3+&gt;-doped fluorescent powder for enhancing Ce&lt;3+&gt; yellow luminescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] A Bi 3+ Doping enhanced Ce 3+ Phosphor powder emitting yellow light, the preparation method is as follows:

[0029] Raw materials used: Gd 2 o 3 (99.99%), Y 2 o 3 (99.99%), CeO 2 (99.99%), Bi(NO 3 ) 3 ·5H 2 O (99.0%), Al (NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0030] (1) Powdered Gd 2 o 3 , Y 2 o 3 and CeO 2respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0031] (2) Press (Gd 0.75-x Y 0.2 Bi 0.05 Ce x ) 3 Al 5 o 12 ( x =0.001) stoichiometric ratio to measure rare earth nitrate, Bi(NO 3 ) 3 solution and Al(NO 3 ) 3 solution, add deionized water to make a solution with a volume of 100 mL, stir for 10 min, and mix the mother salt solution evenly;

[0032] (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;

[0033...

Embodiment 3

[0037] A Bi 3+ Doping enhanced Ce 3+ Phosphor powder emitting yellow light, the preparation method is as follows:

[0038] Raw materials used: Gd 2 o 3 (99.99%), Y 2 o 3 (99.99%), CeO 2 (99.99%), Bi(NO 3 ) 3 ·5H 2 O (99.0%), Al (NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0039] (1) Powdered Gd 2 o 3 , Y 2 o 3 and CeO 2 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0040] (2) Press (Gd 0.75-x Y 0.2 Bi 0.05 Ce x ) 3 Al 5 o 12 ( x =0.003) stoichiometric ratio to measure rare earth nitrate, Bi(NO 3 ) 3 solution and Al(NO 3 ) 3 solution, add deionized water to make a solution with a volume of 100 mL, stir for 10 min, and mix the mother salt solution evenly;

[0041] (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;

[004...

Embodiment 4

[0046] A Bi 3+ Doping enhanced Ce 3+ Phosphor powder emitting yellow light, the preparation method is as follows:

[0047] Raw materials used: Gd 2 o 3 (99.99%), Y 2 o 3 (99.99%), CeO 2 (99.99%), Bi(NO 3 ) 3 ·5H 2 O (99.0%), Al (NO 3 ) 3 9H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0048] (1) Powdered Gd 2 o 3 , Y 2 o 3 and CeO 2 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0049] (2) Press (Gd 0.75-x Y 0.2 Bi 0.05 Ce x ) 3 Al 5 o 12 ( x =0.005) stoichiometric ratio to measure rare earth nitrate, Bi(NO 3 ) 3 solution and Al(NO 3 ) 3 solution, add deionized water to make a solution with a volume of 100 mL, stir for 10 min, and mix the mother salt solution evenly;

[0050] (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;

[005...

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Abstract

The invention relates to Bi<3+>-doped fluorescent powder for enhancing Ce<3+> yellow luminescence. The invention discloses the Bi<3+>-doped (Gd, Y)AG fluorescent powder for enhancing Ce<3+> yellow luminescence, and a chemical composition formula of the (Gd, Y)AG fluorescent powder is (Gd0.74Y0.2Bi0.05Ce0.01)3Al5O12((Gd0.74Y0.2Bi0.05Ce0.01)AG). A synthesis method of the series of fluorescent powderis characterized by comprising the following steps: mixing a lanthanide nitrate solution and an aluminum nitrate solution to prepare a mother salt solution according to a stoichiometric proportion, mixing with an ammonium hydrogen carbonate precipitant solution to obtain suspension, performing centrifugation, water washing and drying to obtain a white precursor, and finally calcining to obtain the (Gd0.74Y0.2Bi0.05Ce0.01)AG yellow fluorescent powder. The fluorescent powder prepared by the invention is simple in obtaining method, uniform in morphology, good in dispersibility and excellent in fluorescent performance.

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 luminescent materials, gadolinium aluminate-based fluorescent materials 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, traditional fluorescent materials have gradually been unable to meet people's needs. [0003] (Gd,Y)AG phosphor has a monodisperse and uniform microscopic morphology, and the Gd 3+ and Bi 3+ It is also a good sensitizer, which can enhance the Ce 3+ yellow light emission. Therefore, it is of great significance to develop this yellow phosphor. Contents of the invention [0004] The present invention aims to propose a Bi 3+ / C 3+ Co-doped (Gd,Y)AG new yellow phosphor. [0005] The technical problem to be so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7774
Inventor 陈奇李金凯
Owner UNIV OF JINAN
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