A europium ion eu 3+ Activated aluminate red phosphor and preparation method thereof

A technology of red fluorescent powder and europium ions, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of unoptimistic application and weakened luminous brightness, etc., and achieves simple and easy preparation methods, good chromaticity, and good crystallinity Effect

Active Publication Date: 2021-06-08
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, red phosphor cannot effectively absorb in the range from near ultraviolet to blue light, which greatly reduces the brightness of light emission, so its application is still not optimistic

Method used

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  • A europium ion eu <sup>3+</sup> Activated aluminate red phosphor and preparation method thereof
  • A europium ion eu <sup>3+</sup> Activated aluminate red phosphor and preparation method thereof
  • A europium ion eu <sup>3+</sup> Activated aluminate red phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Zn 2.79 Eu 0.21 MgAl 22 o 37 : According to the chemical formula Zn 2.79 Eu 0.21 MgAl 22 o 37 The stoichiometric ratio of each element in the raw material is weighed respectively: zinc nitrate Zn(NO 3 ) 2 ·6H 2 O: 1.494g, europium nitrate Eu(NO 3 ) 3 ·6H 2 O: 0.149g, magnesium basic carbonate 4MgCO 3 ·Mg(OH) 2 ·5H 2 O: 0.1748g, aluminum nitrate Al(NO 3 ) 3 9H 2 O: 14.85g, each raw material weighed above was dissolved in nitric acid and diluted with deionized water, 0.91g oxalic acid was added to the zinc nitrate solution, 0.1g oxalic acid was added to the basic magnesium carbonate solution, and 0.1g oxalic acid was added to the europium nitrate solution Add 0.07g of oxalic acid, add 7.13g of oxalic acid to the aluminum nitrate solution, stir for a period of time until the oxalic acid dissolves to obtain each raw material solution; mix the above raw material solutions, and stir at 85°C, and dry to obtain the precursor sol ; The precursor ...

Embodiment 2

[0037] Preparation of Zn 2.7 Eu 0.3 MgAl 22 o 37 : According to the chemical formula Zn 2.7 Eu 0.3 MgAl 22 o 37 The stoichiometric ratio of each element in the formula is weighed respectively Raw materials: zinc oxide ZnO: 0.88g, europium oxide Eu 2 o 3 : 0.212g, magnesium nitrate Mg(NO 3 ) 2 : 0.6g, aluminum oxide Al 2 o 3 : 4.48g, each raw material weighed above is dissolved in nitric acid respectively and diluted with deionized water, 2.07g of citric acid is added in the zinc oxide solution, citric acid is added in the magnesium nitrate solution: 0.77g, in the europium oxide solution Add citric acid: 0.115g, add citric acid: 4.45g to the alumina solution, stir for a period of time until the citric acid dissolves to obtain each raw material solution; mix the above raw material solutions, stir at 50°C, and dry Finally, the precursor sol was obtained; the precursor sol was calcined at 350°C for 10h to obtain a precursor mixture, and then the precursor mixture was g...

Embodiment 3

[0040] Preparation of Zn 2.997 Eu 0.003 MgAl 22 o 37 : According to the chemical formula Zn 2.997 Eu 0.003 MgAl 22 o 37 The stoichiometric ratio of each element is weighed respectively Raw materials: zinc hydroxide Zn(OH) 2 : 2.68g, europium nitrate Eu(NO 3 ) 3 ·6H 2 O: 0.0129g, magnesium oxide MgO: 0.36g, aluminum hydroxide Al(OH) 3 : 15.44g, each raw material weighed above was dissolved in nitric acid and diluted with deionized water, 2.67g oxalic acid was added to the zinc hydroxide solution, oxalic acid was added to the magnesium oxide solution: 0.891g was added to the europium nitrate solution Oxalic acid: 0.01g, add oxalic acid: 19.6g to the aluminum hydroxide solution, stir for a period of time until the oxalic acid is dissolved to obtain each raw material solution; mix the above raw material solutions, stir at 80°C, and dry to obtain the precursor body sol; the precursor sol was calcined at 650°C for 7h to obtain a precursor mixture, then the precursor mixtu...

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Abstract

A europium ion Eu 3+ Activated aluminate red phosphor and preparation method thereof, chemical formula is Zn 3‑3x Eu 3x MgAl 22 o 37 , where x is Eu 3+ Doped with Zn 2+ The molar ratio of bits, 0.001≤x≤0.1. The fluorescent powder matrix prepared by the present invention is a kind of aluminate, and the crystal lattice has very strong rigidity, and thermal stability is high, is suitable for preparing the lighting device of high power; In Zn 3 MgAl 22 o 37 In the lattice, Eu 3+ Doped in Zn with smaller radius 2+ ion sites, and there are multiple divalent cation sites in the lattice, Eu 3+ The crystallographic environment of ions is fully disturbed, realizing a more pure red luminescence; its particles are small and evenly distributed, with good dispersion, good crystallinity, and high luminous efficiency; the chemical sol-gel method is used for preparation, and after dissolving by nitric acid Then calcining, the process is simple and easy, the cost of raw materials and preparation is low, the crystallinity of the powder is good, and there is no environmental pollution.

Description

technical field [0001] The invention relates to a fluorescent material and a preparation method thereof, in particular to a europium ion Eu 3+ An activated aluminate red fluorescent powder and a preparation method thereof belong to the technical field of luminescent materials. Background technique [0002] With the development of today's science and technology, the application of luminescent materials in many fields such as lighting, display, information transmission and storage is becoming more and more important, such as: lighting field (lighting source lamps), information field (photoelectric conversion), energy (sensitized solar components), biomedicine (biological imaging, drug release), security (explosives detection), high-energy physics (high-energy ion detectors), etc. Among various luminescent materials, phosphors activated by rare earth ions are the most important workhorse materials for lighting, display and information technology and detection devices. In parti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
Inventor 唐惠东杨蓉
Owner CHANGZHOU VOCATIONAL INST OF ENG
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