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Molybdate series two-mode luminescent material of alkali metal or alkaline earth metal and preparation method thereof

A technology of alkaline earth metals and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of narrow wavelength range of excitation light and single luminescent wavelength.

Inactive Publication Date: 2013-04-24
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rare earth-doped luminescent materials currently used in technical fields such as anti-counterfeiting and biomarking are mainly limited to various down-converting materials that display visible light under the excitation of a near-ultraviolet light source; or under the excitation of a near-infrared light source, display Up-conversion materials for visible light
Therefore, the current anti-counterfeiting generating materials have the problem of a single luminous wavelength, and the wavelength range of the excitation light is generally narrow.
Therefore, there are great limitations in the application of these luminescent materials

Method used

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  • Molybdate series two-mode luminescent material of alkali metal or alkaline earth metal and preparation method thereof
  • Molybdate series two-mode luminescent material of alkali metal or alkaline earth metal and preparation method thereof
  • Molybdate series two-mode luminescent material of alkali metal or alkaline earth metal and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0025] According to one embodiment of the present invention, an alkali metal or alkaline earth metal molybdate-based dual-mode luminescent material is provided, and its chemical composition formula is:

[0026] AB 2-x-y-z (MoO 4 ) 4 :xEu 3+ ,yYb 3+ , zEr 3+ / Tm 3+ (1)

[0027] Among them, A=Ba 2+ 、2Li + , 2Na+ or 2K + ;B=Gd 3+ or La 3+ , and x=0.1~1.0, y=0.1~0.3, z=0.02~0.06. The alkali metal or alkaline earth metal molybdate-based dual-mode luminescent material is a dual-mode luminescent material that realizes down-conversion excitation and up-conversion excitation under, for example, 395nm ultraviolet light and 980nm infrared laser light. Compared with the luminescent materials of the prior art, the molybdate-based luminescent material of the present invention exhibits a stable excitation light of about 614 nm under the ultraviolet light of 395 nm, and a stable excitation light in the range of 523-553 nm under the infrared excitation of 980 nm. Light.

[0028] ...

Embodiment 1

[0037] Embodiment 1: Preparation of BaGd 1.14 (MoO 4 ) 4 :0.6Eu 3+ , 0.2Yb 3+ , 0.06Er 3+

[0038] Weigh 1.97g of BaCO respectively 3 , 2.07g of Gd 2 o 3 , 5.76g of MoO 3 , 0.394g of Yb 2 o 3 , 0.115g of Er 2 o 3 and 1.06g of Eu 2 o 3 , the above raw materials were mixed in an agate mortar and ground evenly, then loaded into a corundum crucible, calcined at a temperature of 850°C for 6 hours, and kept at a constant temperature for 4 hours. Then, after cooling, grind again evenly, pulverize through a 200-mesh standard sieve, and finally obtain the molybdate-based dual-mode luminescent material BaGd of the present invention. 1.14 (MoO 4 ) 4 :0.6Eu 3+ , 0.2Yb 3+ , 0.06Er 3+ .

[0039] The prepared dual-mode luminescent material BaGd 1.14 (MoO 4 ) 4 :0.6Eu 3+ , 0.2Yb 3+ , 0.06Er 3+ Excited under 395nm ultraviolet light, it emits red light; excited under 980nm infrared light, it emits green light. For its room temperature excitation and emission spectra, ...

Embodiment 2

[0040] Embodiment 2: prepare Na 2 La 1.14 (MoO 4 ) 4 :0.6Eu 3+ , 0.2Yb 3+ , 0.06Er 3+

[0041] Weigh 1.06g of Na respectively 2 CO 3 , 1.860g La 2 o 3 , 5.76g of MoO 3 , 0.394g of Yb 2 o 3 , 0.115g of Er 2o 3 and 1.06g of Eu 2 o 3 , the above raw materials were mixed in an agate mortar and ground evenly, then loaded into a corundum crucible, sintered at a temperature of 850°C for 6 hours, and kept at a constant temperature for 4 hours. Then, after cooling, grind again evenly, crush through a 200-mesh standard sieve, and finally obtain the dual-mode luminescence case material Na 2 La 1.14 (MoO 4 ) 4 :0.6Eu 3+ , 0.2Yb 3+ , 0.06Er 3+ .

[0042] The dual-mode luminescent material Na 2 La 1.14 (MoO 4 ) 4 :0.6Eu 3+ , 0.2Yb 3+ , 0.06Er 3+ Excited under 395nm ultraviolet light, it emits red light; excited under 980nm infrared light, it emits green light. For its room temperature excitation and emission spectra, please refer to the appendix of the manual....

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Abstract

The invention provides a molybdate series two-mode luminescent material of alkali metal or alkaline earth metal and a preparation method thereof. The chemical component formula of the luminescent material is AB2-x-y-z(MoO4)4: xEu3+, yYb3+, zEr3+ / Tm3+, wherein A = Ba2+, 2Li+, 2Na+ or 2K+, B = Gd3+ or La3+, x = 0.1-1.0, y = 0.1-0.3, and z = 0.02-0.06. For example, the two-mode luminescent material can separately realize conversion excitation and upconversion excitation, namely the two-mode luminescence under 395nm of ultraviolet light and 980nm of infrared laser. The preparation method of the invention is that the raw material is calcined at 850 DEG C for 4-8 hours through the commonly used high-temperature synthesis method to prepare the molybdate series two-mode luminescent material of alkali metal or alkaline earth metal.

Description

technical field [0001] The invention relates to the technical field of inorganic luminescent materials. Specifically, the present invention relates to an alkali metal or alkaline earth metal molybdate-based dual-mode luminescent material and a preparation method thereof. Background technique [0002] At present, inorganic fluorescent materials have been widely used in lighting such as white light LEDs, anti-counterfeiting such as anti-counterfeiting inks, biomarkers such as bioprobes, electroluminescence, molecular electronics, lasers and scintillation counting technologies, and are an important class of functional materials. [0003] Anti-counterfeiting technology is inseparable from anti-counterfeiting materials, and a large branch of anti-counterfeiting materials is luminescent materials. The most common method of luminescent materials for anti-counterfeiting is to make these materials into ink or paint and print them on a certain substrate. This technology is widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 孙家跃杜海燕张玮航
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY