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A kind of trichromatic fluorescent powder and preparation method thereof

A fluorescent powder and three-primary color technology, applied in the field of luminescence, can solve the problems of troublesome preparation and inflexible use environment, and achieve the effects of improved mechanical properties, wide applicability, and flexible color matching methods

Inactive Publication Date: 2016-06-15
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although people can prepare color-tunable phosphors by co-doping a variety of rare earths, this phosphor can only switch between two fixed colors, and there are problems such as relatively troublesome preparation and inflexible use environments.

Method used

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  • A kind of trichromatic fluorescent powder and preparation method thereof
  • A kind of trichromatic fluorescent powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the general chemical formula 0.1(Ca 0.99 Eu 0.01 CO 3 )+0.9(Ca 0.95 Tb 0.05 CO 3 ), weigh Na respectively 2 CO 3 Mass 105.99g, CaCl 2 Mass 110.95g, prepare Na in a 1000ml volumetric flask 2 CO 3 solution and CaCl 2 The concentration of the solution is 1.00mol / L; weigh Eu(NO 3 ) 3 Mass 4.46g, Tb(NO 3 ) 3 Quality 4.53g, prepare Eu(NO 3 ) 3 solution and Tb(NO 3 ) 3 The concentrations of the solutions are all 0.10mol / L. First measure the CaCl 2 Solution 10ml with Eu(NO 3 ) 3 Solution 1ml or Tb(NO 3 ) 3 5ml of the solution was placed in a beaker to form a mixed solution, and it was added dropwise to 12ml of Na 2 CO 3 Solution, carry out co-precipitation reaction (microwave-assisted), after filtering and drying, Ca 0.99 Eu 0.01 CO 3 Phosphor powder 0.5g and Ca 0.95 Tb 0.05 CO 3 Phosphor powder 4.5g. Finally, the two phosphor powders were evenly mixed to obtain color-tunable phosphor powder A.

Embodiment 2

[0020] According to the general chemical formula 0.2 (Ca 0.99 Eu 0.01 CO 3 )+0.8(Ca 0.95 Tb 0.05 CO 3 ), weigh Na respectively 2 CO 3 Mass 105.99g, CaCl2 Mass 110.95g, prepare Na in a 1000ml volumetric flask 2 CO 3 solution and CaCl 2 The concentration of the solution is 1.00mol / L; weigh Eu(NO 3 ) 3 Mass 4.46g, Tb(NO 3 ) 3 Quality 4.53g, prepare Eu(NO 3 ) 3 solution and Tb(NO 3 ) 3 The concentrations of the solutions are all 0.10mol / L. First measure the CaCl 2 Solution 10ml with Eu(NO 3 ) 3 Solution 1ml or Tb(NO 3 ) 3 5ml of the solution was placed in a beaker to form a mixed solution, and it was added dropwise to 12ml of Na 2 CO 3 Solution, carry out co-precipitation reaction (microwave-assisted), after filtering and drying, Ca 0.99 Eu 0.01 CO 3 Phosphor powder 1.0g and Ca 0.95 Tb 0.05 CO 3 Phosphor powder 4.0g. Finally, the two phosphor powders were evenly mixed to obtain color-tunable phosphor powder B.

Embodiment 3

[0022] According to the general chemical formula 0.3(Ca 0.99 Eu 0.01 CO 3 )+0.7(Ca 0.95 Tb 0.05 CO 3 ), weigh Na respectively 2 CO 3 Mass 105.99g, CaCl 2 Mass 110.95g, prepare Na in a 1000ml volumetric flask 2 CO 3 solution and CaCl 2 The concentration of the solution is 1.00mol / L; weigh Eu(NO 3 ) 3 Mass 4.46g, Tb(NO 3 ) 3 Quality 4.53g, prepare Eu(NO 3 ) 3 solution and Tb(NO 3 ) 3 The concentrations of the solutions are all 0.10mol / L. First measure the CaCl 2 Solution 10ml with Eu(NO 3 ) 3 Solution 1ml or Tb(NO 3 ) 3 5ml of the solution was placed in a beaker to form a mixed solution, and it was added dropwise to 12ml of Na 2 CO 3 Solution, carry out co-precipitation reaction (microwave-assisted), after filtering and drying, Ca 0.99 Eu 0.01 CO 3 Phosphor powder 1.5g and Ca 0.95 Tb 0.05 CO 3 Phosphor powder 3.5g. Finally, the two phosphor powders were evenly mixed to obtain color-tunable phosphor powder C.

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Abstract

The invention discloses a trichromatic phosphor and a color-modulation preparation method thereof. A general formula of the trichromatic phosphor is m(CaACO3)+n(Ca<x>M<y>CO3), wherein m and n are represented as mass fraction and satisfy following conditions: 0<=m<=1, 0<=n<=1, m+n=1, and the m and the n are not zero at the same time. The A and the M are any one of rare earth elements Eu, Tb and Ce and are not the same element. The a, the b, the x and the y are molecular fraction of the element and satisfy following conditions: 0.95<=a<=0.99, 0.01<=b<=0.05, a+b=1, the a and the b are not zero at the same time, 0.95<=x<=0.99, 0.01<=y<=0.05, x+y=1, and the x and the y are not zero at the same time. The preparation method includes following steps: (1) preparing a negative ion precursor solution and a positive ion precursor solution in certain concentrations; (2) performing a coprecipitation method reaction; (3) obtaining the trichromatic phosphor through filtration and drying; and (4) finally uniformly mixing the trichromatic phosphor according to different mass fractions to obtain a color-modulated trichromatic phosphor. The trichromatic phosphor, with calcium carbonate as a substrate, not only has a fluorescent falsification-preventing function, but also can enhance mechanical performance of a material and reduce product cost.

Description

technical field [0001] The invention relates to a three-primary-color fluorescent powder and a preparation method thereof, belonging to the technical field of light emission. Background technique [0002] In recent years, with the development of science and technology and the upgrading of products in daily life, the application range of rare earth phosphors has become wider and wider, and the requirements for rare earth phosphors have also become higher and higher. The development of new phosphors with different substrates and activators has attracted much attention. Among them, anti-counterfeit functional fluorescent materials have been widely used in people's daily life. At present, fluorescent anti-counterfeiting is mainly used in several aspects such as anti-counterfeiting ink and anti-counterfeiting ink, while polymer materials are an important part of daily life materials, and their anti-counterfeiting products are in short supply. [0003] At present, in order to de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 康明程淇俊孙蓉宋丽贤张平
Owner SOUTHWEAT UNIV OF SCI & TECH