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Red phosphor activated by europium ions Eu3+, preparation method and application

A red phosphor, europium ion technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc.

Active Publication Date: 2019-05-21
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method is simple and easy, the production cost is low, there is no pollution, and the performance of the synthesized luminescent material is stable, and there is no report yet

Method used

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  • Red phosphor activated by europium ions Eu3+, preparation method and application
  • Red phosphor activated by europium ions Eu3+, preparation method and application
  • Red phosphor activated by europium ions Eu3+, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of CaBiLa 0.88 Eu 0.12 V 2 o 9

[0033] According to the chemical formula CaBiLa 0.88 Eu 0.12 V 2 o 9 The stoichiometric ratio of the elements Ca, Bi, La, Eu and V in the medium, respectively weighed calcium nitrate Ca(NO 3 ) 2 : 1.18 g, bismuth nitrate Bi (NO 3 ) 3 ·5H 2 O: 2.436 grams, lanthanum nitrate La (NO 3 ) 3 ·6H 2 O: 2.574 grams, europium nitrate Eu (NO 3 ) 3 ·6H 2 O: 0.268 g, ammonium vanadate NH 4 VO 3 : 1.17g. The above reagents were dissolved in dilute nitric acid solution. Then add oxalic acid: 0.9 g to the calcium nitrate solution, add 0.9 g oxalic acid to the bismuth nitrate solution, add 0.792 g oxalic acid to the lanthanum nitrate solution, add 0.11 g oxalic acid to the europium nitrate solution, add 0.11 g to the ammonium vanadate solution Added oxalic acid: 1.8 grams. Each solution was continuously stirred until clear and transparent.

[0034] Mix and stir the above solutions, place the obtained mixed sol in an ove...

Embodiment 2

[0040] Preparation of CaBiLa 0.999 Eu 0.001 V 2 o 9

[0041] According to the chemical formula CaBiLa 0.999 Eu 0.001 V 2 o 9 The stoichiometric ratio of the elements Ca, Bi, La, Eu and V in the medium, weigh calcium carbonate CaCO 3 : 0.9 g, bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O: 4.366 g, lanthanum oxide La 2 o 3 : 1.45 g, europium nitrate Eu (NO 3 ) 3 ·6H 2 O: 0.01 g, vanadium pentoxide V 2 o 5 : 1.638 g. Dissolve the above reagents in dilute nitric acid solution respectively, then add oxalic acid: 1.215 g to the calcium carbonate solution, add 1.215 g oxalic acid to the bismuth nitrate solution, add 0.6 g oxalic acid to the lanthanum oxide solution, and add 0.6 g to the europium nitrate solution Add oxalic acid: 0.01 g, add oxalic acid: 1.215 g in the vanadium pentoxide solution. Each solution was continuously stirred for a period of time until clear and transparent.

[0042] Mix and stir the above solutions, place the obtained mixed sol in an oven, set the...

Embodiment 3

[0045] Preparation of CaBiLa 0.85 Eu 0.15 V 2 o 9

[0046] According to the chemical formula CaBiLa 0.85 Eu 0.15 V 2 o 9 The stoichiometric ratio of the elements Ca, Bi, La, Eu and V in the medium, respectively weigh calcium oxide CaO: 0.504 g, bismuth carbonate (BiO) 2 CO 3 0.5H 2 O: 2.335 grams, lanthanum oxide La 2 o 3 : 1.464 g, europium oxide Eu 2 o 3 : 0.237 g, ammonium vanadate NH 4 VO 3 : 2.106 g. Dissolve the above reagents in dilute nitric acid solution respectively, then add oxalic acid: 1.215 grams in calcium oxide solution, add oxalic acid: 0.61 grams in bismuth carbonate solution, add oxalic acid: 0.61 grams in lanthanum oxide solution, add oxalic acid: 0.61 grams in europium oxide solution Add oxalic acid: 0.1 gram in the ammonium vanadate solution and add oxalic acid: 2.43 grams. Each solution is continuously stirred for a period of time until it is clear and transparent.

[0047] Mix and stir the above solutions, place the obtained mixed sol i...

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Abstract

The invention relates to vanadate red phosphor activated by europium ions Eu3+, a preparation method and application, and belongs to the technical field of inorganic light emitting materials. The chemical formula of the phosphor is CaBiLa1-xEuxV2O9, wherein x is a mole ratio of doped Eu3+ to substituted lanthanum ions La3+ and is greater than or equal to 0.001 and smaller than or equal to 0.15. The prepared phosphor is synthesized by a sol-gel method, the preparation method is simple and environmentally friendly, the raw material and the preparation cost is low, the powder purity is high, thecrystallinity is good, the performance is stable, the phosphor has a wide excitation band in a near-ultraviolet region, and the emission wavelength of a near-ultraviolet LED chip is well matched; under the excitation of the near-ultraviolet wavelength, an obtained red light spectrum is a sharp jump emission peak at 613 nm and has very pure chromaticity; the light emitting efficiency is high, and the stability is high.

Description

technical field [0001] The invention belongs to the technical field of inorganic luminescent materials, in particular to a europium ion Eu 3+ Preparation method and application of activated red fluorescent powder. Background technique [0002] The history of human lighting has experienced the development of torches, oil lamps and electric lamps. Traditional lighting is mainly incandescent lamps, fluorescent lamps, and various steam lamps. These lighting sources have disadvantages such as high energy consumption, short life, and certain pollution in the preparation process. With the development of the semiconductor industry and the continuous innovation of new semiconductor chips, a new lighting source has emerged in recent years, that is, the rapidly developing white LED lighting. So far, the new white LED has become a new green lighting source. It is a kind of all-solid-state lighting, which has a series of advantages such as energy saving, long life, and environmental pro...

Claims

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Application Information

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IPC IPC(8): C09K11/82H01L33/50
Inventor 唐惠东杨蓉
Owner CHANGZHOU VOCATIONAL INST OF ENG
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