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Ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal and preparation method thereof

A technology of dodecacalcium and heptaaluminum, which is applied in the field of dodecacalcium heptaaluminate polycrystal and its preparation, and can solve the problems of wide wavelength distribution of blue light, unfavorable application and the like

Inactive Publication Date: 2011-09-07
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the technical problem that the blue light wavelength distribution of the existing blue light material is wide, which is not conducive to the application, and provides ytterbium thulium double-doped heptaaluminate calcium dodecaaluminate polycrystal and its preparation method

Method used

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  • Ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal and preparation method thereof
  • Ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal and preparation method thereof
  • Ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal and preparation method thereof

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The ytterbium-thulium double-doped calcium dodecaaluminate polycrystal of this embodiment is made of calcium oxide, aluminum oxide, ytterbium oxide and thulium oxide, wherein the molar ratio of calcium oxide and aluminum oxide is 12:7 The amount of ytterbium oxide is 0.042%-0.42% of that of calcium oxide, and the amount of thulium oxide is 0.042%-0.21% of that of calcium oxide.

[0010] In this embodiment, the wide bandgap oxide dodecaaluminate heptaaluminate is used as the doped host material, and by doping ytterbium and thulium elements, and adjusting the doping concentration of the two elements, under the excitation of 980nm infrared light, a narrow wavelength can be realized. High-intensity up-conversion blue light emission with good monochromaticity in the range (460nm-490nm).

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the amount of ytterbium oxide is 0.06% to 0.35% of the amount of calcium oxide, and the amount of thulium oxide is 0.06% of the amount of calcium oxide. ~0.18%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment differs from Embodiment 1 in that the amount of ytterbium oxide is 0.15% of that of calcium oxide, and the amount of thulium oxide is 0.10% of that of calcium oxide. Others are the same as in the first embodiment.

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Abstract

The invention discloses an ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal and a preparation method thereof, relating to dodecacalcium heptaluminate polycrystal and a preparation method thereof, and solving the technical problem that the conventional blue material does not contribute to application due to wide blue wavelength distribution. The ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal is prepared from calcium oxide, aluminum oxide, ytterbium oxide and thulium oxide, wherein the molar ratio of the calcium oxide to the aluminum oxide is 12:7; the amount of substance of the ytterbium oxide is 0.042-0.42 percent of that of the calcium oxide; and the amount of substance of the thulium oxide is 0.042-0.21 percent of that of the calcium oxide. The method comprises the following steps of: grinding the calcium oxide, the aluminum oxide, the ytterbium oxide and the thulium oxide powder; sheeting; and sintering under an air atmosphere to obtain the ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal. Single blue light emission with wavelength of 460-490nm is obtained under excitation of light with wavelength of 980nm. The polycrystal can be used in the fields of light storage technology, optoelectronic technology, sensor technology and submarine optical cable communication.

Description

technical field [0001] The invention relates to dodecacalcium heptaaluminate polycrystal and a preparation method thereof. Background technique [0002] Up-conversion luminescence, also known as anti-Stokes luminescence, refers to the phenomenon of converting two or more low-energy photons into one high-energy photon. Up-conversion luminescence materials need to be doped with rare earth elements in the matrix. Rare earth luminescent materials have strong energy absorption capacity and high conversion efficiency; they can emit spectra from ultraviolet to infrared light, especially in the visible light region; they have stable physical and chemical properties and can withstand high-power electron beams, Advantages such as the effect of high-energy rays and strong ultraviolet light, such as the Chinese patent with the publication number CN101671561A discloses a blue long afterglow luminescence heptaaluminate dodecacalcium (chemical formula is 12CaO 7Al 2 o 3 , abbreviated as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 王锐刘亮徐衍岭孙金超张昱屾仇兆忠
Owner HARBIN INST OF TECH
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