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Ca/Mn co-doped (Gd, Y) AG red fluorescent powder

A red phosphor, 20at.%y3 technology, used in luminescent materials, chemical instruments and methods, etc.

Pending Publication Date: 2019-07-26
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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  • Ca/Mn co-doped (Gd, Y) AG red fluorescent powder
  • Ca/Mn co-doped (Gd, Y) AG red fluorescent powder
  • Ca/Mn co-doped (Gd, Y) AG red fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0029] A Ca / Mn co-doped (Gd, Y)AG red fluorescent powder, the preparation method is as follows:

[0030] Raw materials used: Gd 2 o 3 (99.99%), Y 2 o 3 (99.99%), Ca(NO 3 ) 3 4H 2 O(99.0%)Al(NO 3 ) 3 9H 2 O (99.0%), MnCl 4H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO3 , 68%);

[0031] (1) Powdered Gd 2 o 3 and Y 2 o 3 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0032] (2) Ca(NO 3 ) 3 4H 2 O, Al(NO 3 ) 3 9H 2 O and MnCl 4H 2 O is dissolved in deionized water to form Ca(NO 3 ) 3 , Al(NO 3 ) 3 and MnCl solution;

[0033] (3) Press (Gd 0.8-5x / 3 Y 0.2 Ca 5x / 3 ) 3 (Al 1-x mn x ) 5 o 12 ( x =0.0001) Stoichiometric ratio Measure the salt solution, add deionized water to make a solution with a volume of 100 mL, stir for 10 min, so that the mother salt solution is evenly mixed;

[0034] (4) Weigh an appropriate amount of NH 4 HCO 3 Dissolve in deionized water, place in a constant tem...

Embodiment 3

[0039] A Ca / Mn co-doped (Gd, Y)AG red fluorescent powder, the preparation method is as follows:

[0040] Raw materials used: Gd 2 o 3 (99.99%), Y 2 o 3 (99.99%), Ca(NO 3 ) 3 4H 2 O(99.0%)Al(NO 3 ) 3 9H 2 O (99.0%), MnCl 4H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0041] (1) Powdered Gd 2 o 3 and Y 2 o 3 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0042] (2) Ca(NO 3 ) 3 4H 2 O, Al(NO 3 ) 3 9H 2 O and MnCl 4H 2 O is dissolved in deionized water to form Ca(NO 3 ) 3 , Al(NO 3 ) 3 and MnCl solution;

[0043] (3) Press (Gd 0.8-5x / 3 Y 0.2 Ca 5x / 3 ) 3 (Al 1-x mn x ) 5 o 12 ( x =0.0003) Stoichiometric ratio Measure the salt solution, add deionized water to make a solution with a volume of 100 mL, stir for 10 min, so that the mother salt solution is evenly mixed;

[0044] (4) Weigh an appropriate amount of NH 4 HCO 3 Dissolve in deionized water, place in a constant t...

Embodiment 4

[0049] A Ca / Mn co-doped (Gd, Y)AG red fluorescent powder, the preparation method is as follows:

[0050] Raw materials used: Gd 2 o 3 (99.99%), Y 2 o 3 (99.99%), Ca(NO 3 ) 3 4H 2 O(99.0%)Al(NO 3 ) 3 9H 2 O (99.0%), MnCl 4H 2 O (99.0%), NH 4 HCO 3 (99.0%), nitric acid (HNO 3 , 68%);

[0051] (1) Powdered Gd 2 o 3 and Y 2 o 3 respectively dissolved in hot nitric acid to remove excess HNO 3 Dubbed rare earth nitrate solution;

[0052] (2) Ca(NO 3 ) 3 4H 2 O, Al(NO 3 ) 3 9H 2 O and MnCl 4H 2 O is dissolved in deionized water to form Ca(NO 3 ) 3 , Al(NO 3 ) 3 and MnCl solution;

[0053] (3) Press (Gd 0.8-5x / 3 Y 0.2 Ca 5x / 3 ) 3 (Al 1-x mn x ) 5 o 12 ( x =0.0005) Stoichiometric ratio Measure the salt 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;

[0054] (4) Weigh an appropriate amount of NH 4 HCO 3 Dissolve in deionized water, place in a constant temperatur...

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Abstract

The invention discloses a Ca / Mn co-doped (Gd, Y) AG red fluorescent powder. A chemical formula of the Ca / Mn co-doped (Gd, Y) AG red fluorescent powder is (Gd0.8-5x / 3Y0.2Ca5x / 3)3(Al1-xMnx)5O12. A synthesis method of the fluorescent powder includes: mixing nitrate solution according to a stoichiometric ratio to obtain salt mother solution, mixing with an ammonium bicarbonate precipitant to obtain suspension, performing centrifuging, washing and drying to obtain a white precursor, and finally calcining to obtain (Gd0.8-5x / 3Y0.2Ca5x / 3)3(Al1-xMnx)5O12 red fluorescent powder. In the prepared fluorescent powder, Ca<2+> and Mn<4+> are co-doped according to a mole ratio of 1:1 to neutralize charge defects caused by replacement of Al<3+> with Mn<4+>, and accordingly the fluorescent powder has excellent fluorescent performances.

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, YAG-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] The phase formation temperature of GdAG phosphor is low, which can save energy in the production process, and Ca 2+ and Mn 4+ The required doping amount is low, the price is low, and the resource is abundant. It has great advantages in replacing rare earth elements as phosphor activators and sensitizers. Therefore, it is of great significance to develop this red phosphor. Contents of the invention [0004] The purpose of the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7768
Inventor 陈奇李金凯
Owner UNIV OF JINAN
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