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Er<3+>-doped vanadium germanate light conversion material and preparation method thereof

A light conversion material, germanate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of weak absorption and low resonance efficiency, and achieve the effects of no impurity phase, pure phase, and low production cost

Inactive Publication Date: 2017-12-29
NANTONG TEXTILE & SILK IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Er 3+ The ion itself has very low resonance efficiency in the ultraviolet and visible range, and the absorption is very weak

Method used

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  • Er&lt;3+&gt;-doped vanadium germanate light conversion material and preparation method thereof
  • Er&lt;3+&gt;-doped vanadium germanate light conversion material and preparation method thereof
  • Er&lt;3+&gt;-doped vanadium germanate light conversion material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] According to the chemical formula La 10.9989 Er 0.0011 GeV 3 O 26 The stoichiometric ratio of each element in the lanthanum nitrate La(NO 3 ) 3 ·6H 2 O: 7.9375 grams, Erbium Nitrate (NO 3 ) 3 ·5H 2 O: 0.0008 g, germanium chloride GeCl 4 :0.3573 grams, ammonium metavanadate NH 4 VO 3 : 0.5849 grams. Dissolve lanthanum nitrate and erbium nitrate in an appropriate amount of dilute nitric acid, add 5.2839 grams of citric acid weighed and stir magnetically at 70°C for a period of time to obtain a clear solution. Dissolve germanium chloride and ammonium metavanadate in a deionized aqueous solution. Add 1.9214 g of citric acid and stir at 70°C to obtain a clear solution.

[0038] The above-prepared solution was mixed and stirred at 50°C for 1.5 hours, and the obtained mixed solution was placed in an oven with a set temperature of 80°C. After drying for 12 hours, it was naturally cooled and the precursor was taken out. The precursor is placed in a muffle furnace, calcined in an ai...

Embodiment 2

[0044] According to the chemical formula La 6.05 Er 4.95 GeV 3 O 26 The stoichiometric ratio of each element in the lanthanum oxide La 2 O 3 :1.6428g, Erbium oxide 2 O 3 :1.5779 grams, germanium chloride GeCl 4 :0.3573 grams, vanadium pentoxide V 2 O 5 : 0.455 grams. Dissolve lanthanum oxide and erbium oxide in an appropriate amount of dilute nitric acid, and add weighed 3.287 g of oxalic acid and stir magnetically at 100°C for a period of time to obtain a clear solution. Dissolve germanium chloride and vanadium pentoxide in a deionized aqueous solution, and add 1.21 g of oxalic acid was stirred at 100°C to obtain a clear solution.

[0045] Finally, the above two solutions were mixed and stirred at 100°C for 1 hour. The obtained mixed solution was dried in an oven, cooled naturally, and the precursor was taken out. The precursor was placed in a muffle furnace and calcined in an air atmosphere. The sintering temperature was 1200℃, calcination time is 10 hours, cooled to room tempe...

Embodiment 3

[0048] According to the chemical formula La 10.45 Er 0.55 GeV 3 O 26 The stoichiometric ratio of each element in the lanthanum oxide La 2 O 3 :2.8375 grams, Erbium nitrate Er(NO 3 ) 3 ·5H 2 O: 0.4064 g, germanium chloride GeCl 4 :0.3573 grams, ammonium metavanadate NH 4 VO 3 :0.5849g; Dissolve lanthanum oxide in an appropriate amount of dilute nitric acid, and add 3.93g of oxalic acid weighed and stir at 80℃ to obtain a clear solution; Dissolve erbium nitrate in deionized water, add 0.5g of oxalic acid and stir at 85℃ Obtain a clear solution; dissolve germanium chloride and ammonium metavanadate in a deionized aqueous solution, add 1.5 g of oxalic acid and stir at 85°C to obtain a clear solution.

[0049] Finally, the above solution was mixed and stirred at 50°C for 5 hours. The obtained mixed solution was dried in an oven, cooled naturally, and the precursor was taken out. The precursor was placed in a muffle furnace and calcined in an air atmosphere. The sintering temperature was...

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Abstract

The invention discloses an Er<3+>-doped vanadium germanate light conversion material and a preparation method thereof. The chemical formula of vanadium germanate is La11GeV3O26; and after being doped with Er<3+>, the vanadium germanate becomes fluorescent powder which can realize near-infrared luminescence and a general chemical formula of the fluorescent powder is La11-11xEr11xGeV3O26, wherein x is the molar ratio of the Er<3+> doping and is greater than or equal to 0.0001 and is smaller than or equal to 0.45. According to the preparation method of the material disclosed by the invention, the material prepared by adopting a chemical synthesis sol-gel method or a co-precipitation synthesis method has the advantages that particles are small and uniform; the material can emit 1500 to 1600 nm near-infrared light under the excitation of ultraviolet or near ultraviolet light, so that down-conversion of light is effectively realized; and in addition, the Er<3+>-doped vanadium germanate light conversion material is high in luminous efficiency and high in stability, and can be applied to the fields of thermal conversion, laser output and information communication.

Description

Technical field [0001] The invention relates to an ultraviolet-near ultraviolet photosensitive Er 3+ A vanadium germanate light conversion material capable of ionizing and realizing near-infrared radiation and a preparation method thereof belong to the technical field of inorganic luminescent materials. Background technique [0002] Near-infrared light generally refers to electromagnetic waves with a wavelength range of 0.78 to 2.526 microns, that is, the emission band between visible light and mid-infrared light. The specific wavelength range of near-infrared light makes it have some unique characteristics and advantages. For example, on the one hand, near-infrared light has a depth of penetration, and natural materials have a relatively low absorption rate of near-infrared light. Therefore, in the propagation process of near-infrared light, interference caused by absorption of external substances can be avoided. ; On the other hand, near-infrared radiation has a good thermal e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/82
CPCC09K11/7776
Inventor 郑敏
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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