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Rare earth doping CaAl2O4 nano-luminescent material and manufacture method thereof

A nano-fluorescence, rare-earth doping technology is applied in the field of Eu-doped CaAl2O4 nano-fluorescent materials and their preparation

Inactive Publication Date: 2008-08-20
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the CaAl prepared by the above method 2 o 4 :Eu 2+ The grain size of the luminescent material is more than 1 μm, and the CaAl 2 o 4 :Eu 2+ The work on the synthesis and research of one-dimensional nanostructures has not been reported yet

Method used

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  • Rare earth doping CaAl2O4 nano-luminescent material and manufacture method thereof
  • Rare earth doping CaAl2O4 nano-luminescent material and manufacture method thereof
  • Rare earth doping CaAl2O4 nano-luminescent material and manufacture method thereof

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Experimental program
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Embodiment 1

[0036] Europium oxide: calcium oxide: aluminum oxide = 1: 10: 100, zirconium: (calcium oxide + europium oxide + aluminum oxide) = 1: 10, and the temperature of the receiver was 900°C. The argon flow rate was 50 sccm. The vacuum degree of the device is 2×10 -1 Torr. The furnace temperature is 1500°C, and the temperature is kept constant for 1 hour.

[0037] SEM observation found that there are a large number of one-dimensional nanomaterials, see figure 2 , including nanocones (see image 3 ), nanowires (see Figure 4 ), nanorods (see Figure 5 ) and its assembly structure (see Figure 6 ). There is a sphere at the top of the nanocone, the main component is Al, and the cone is in the shape of a polyhedron prism. At the same time, the sides of many nanocone prisms have branch structures, which are similar to the backbone, and are also polyhedral pyramids with aluminum balls on the top. The diameter and length of the nanocones vary greatly. The length of the main body is...

Embodiment 2

[0039] Europium oxide: calcium oxide: aluminum oxide = 1:10:100, aluminum: (europium oxide + calcium oxide + aluminum oxide) = 1:20, and the temperature of the receiver was 1000°C. The oxygen flow rate was 100 sccm. The vacuum degree of the device is 7×10 -1 Torr. The furnace temperature is 1450°C, and the temperature is kept constant for 1 hour. SEM observation (see Figure 12 ) found a large number of one-dimensional nanomaterials, photoluminescence spectra (see Figure 13 ) shows a broad emission band around 440nm.

Embodiment 3

[0041] Europium oxide: calcium oxide: aluminum oxide = 1: 10: 80:, zirconium: (europium oxide + calcium oxide + aluminum oxide) = 1: 15, and the temperature of the receiver was 1000°C. The argon flow rate was 80 sccm. The vacuum degree of the device is 5×10 -1 Torr. The furnace temperature is 1500°C, and the temperature is kept constant for 2 hours. SEM observation (see Figure 14 ) found a large number of one-dimensional nanomaterials, photoluminescence spectra (see Figure 15 ) shows a broad emission band around 440nm.

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Abstract

A rare-earth doped nanophase material CaAl2O4 has monocrystallines CaAl2O4:Eu<2+> with monocline structure, micro-morphology comprises a nano cone, a nano line, a nano stick and / or the related assembling structure, the nano cone is polyhedron pyramid with a ball on the top, the assembling structure is three-dimensional branched structure formed by the nano cone, the nano stick or lines, branch stems grow from certain crystal faces of main stem, and are single crystal extension of the main stem, the branch stem and the main stem are integrated into a whole, the nanophase material CaAl2O4:Eu<2+> shows broadband emission around 440nm, the excitation spectrum of which is also corresponding to a broad excitation band and has a excitation peak around 250nm and 320nm, the biggest creative point of the material is that the single-dimensional nano afterglow material with characteristics configuration is synthesized through chemical gas phase synthesizing method, in microelectronic industry, the material has wide application prospect in the aspects of luminescent paint, detectors, sensors and color plasma displays.

Description

Technical field: [0001] The present invention relates to aluminate doping of calcium, and in particular provides an Eu-doped CaAl 2 o 4 Nano fluorescent material and its preparation method. Background technique: [0002] Since the discovery of carbon nanotubes in 1991, the research on one-dimensional nanomaterials—such as nanotubes, nanowires, nanorods, and nanoribbons—has received extensive attention. It is generally believed that one-dimensional nanostructures provide a good system to study the influence of dimension and scale on electrical conduction, heat conduction, mechanical properties, etc., and to detect and understand some basic physical and chemical problems. Furthermore, one-dimensional nanomaterials can also be used as functional units or wires to prepare nanoscale electronic, optoelectronic, electrochemical and electromechanical devices, such as: nanoscale electronic devices and magnetic devices, functional materials, structural materials, light-emitting Mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 贺连龙梁加淼沈智奇
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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