Ytterbium erbium double-doped calcium tungstate polycrystal powder green ray up-conversion material and preparation method thereof

Abstract

The invention provides an ytterbium erbium double-doped calcium tungstate polycrystal powder green ray up-conversion material and a preparation method thereof, and relates to an rare-earth element doped calcium tungstate polycrystal powder green ray up-conversion material and a preparation method thereof. By the ytterbium erbium double-doped calcium tungstate polycrystal powder green ray up-conversion material and the preparation method thereof, the problem that emitted light with high singleness is difficult to obtain when the rare-earth elements are doped in a matrix material is solved. The chemical formula of the ytterbium erbium double-doped calcium tungstate polycrystal powder green ray up-conversion material is Ca0.99-xWO4:Yb0.01 / Erx, wherein x is more than or equal to 0.001 and less than or equal to 0.08. The preparation method comprises the following steps of: 1, weighing according to the stoichiometric ratio of the chemical formula; 2, grinding and tabletting; and 3, sintering at a high temperature. The ytterbium erbium double-doped calcium tungstate polycrystal powder green ray up-conversion material can emit bright up-conversion green ray uniformly under the conditions of laser pumping of 980 nm and laser power of 300 mW.

Description

technical field [0001] The invention relates to a rare earth element-doped calcium tungstate polycrystalline powder green light up-conversion material 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 a spectrum from ultraviolet light to infrared light, especially in the visible light region. The physical and chemical properties of rare earth elements are stable, and they can withstand the effects of high-power electron beams, high-energy rays and strong ultraviolet light. However, due to the complex energy level division of most rare earth elements, doping rare earth elements in the matri...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of doping rare earth elements in the matrix material, and it is difficult to obtain the emitted light with good uniformity, and to provide a kind of ytterbium-erbium doped calcium tungstate polycrystalline powder green light up-conversion material and its Preparation

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