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A kind of tungstate up-conversion luminescent material and its preparation method and application

A technology of luminescent materials and tungstate, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that up-conversion luminescent materials cannot realize the regulation of luminescence performance, and achieve the effect of high quenching concentration and good chemical stability

Active Publication Date: 2022-05-13
JIANGSU UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides a tungstate up-conversion luminescent material and its preparation method and application, which solves the problem that the existing up-conversion luminescent material cannot realize real-time and in-situ luminous performance regulation, and realizes the up-conversion luminescence through arbitrary temperature control The luminous intensity of the material

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  • A kind of tungstate up-conversion luminescent material and its preparation method and application
  • A kind of tungstate up-conversion luminescent material and its preparation method and application
  • A kind of tungstate up-conversion luminescent material and its preparation method and application

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preparation example Construction

[0041] The embodiment of the present application also provides a preparation method of the above-mentioned tungstate up-conversion luminescent material, including the following steps:

[0042] Mix the A-containing compound, Er-containing compound, Yb-containing compound and W-containing compound according to the element molar ratio of A: Er: Yb: W = (2-2x-2y): 2x: 2y: 3. After mixing evenly, carry out Pre-calcining, then grinding, calcining the ground powder, cooling and grinding again to obtain the tungstate up-conversion luminescent material; wherein A is the elements Al, Bi, Y, Lu, La, Gd and Dy One or more of them, 0<x+y<1.

[0043] Preferably, 0

[0044] The general chemical formula of the above-mentioned tungstate up-conversion luminescent material is A 2-2x-2y Er 2x Yb 2y W 3 o 12 .

[0045] Wherein the A-containing compound, the Er-containing compound, the Yb-containing compound and the W-containing compound are ...

Embodiment 1

[0053] (1) According to chemical formula Y 2-0.4 Er 0.04 Yb 0.36 W 3 o 12 The stoichiometric ratio of Y, Er, Yb and W in Y, weigh Y 2 o 3 , Yb 2 o 3 , WO 3 and Er 2 o 3 The corresponding quality, the purity of these raw materials is 99.99%, grind 2-3 times with absolute ethanol, make it mix evenly;

[0054] (2) Place the ground sample in an oven at 80°C for two hours to dry, then put it into a corundum boat, then put the corundum boat with the sample into a high-temperature furnace for pre-burning, and keep it warm at 500°C in an air atmosphere 6 hours, then naturally cool down to normal temperature;

[0055] (3) Take out the sample from the high-temperature furnace, grind it with alcohol for 2-3 times, and dry it;

[0056] (4) Put the dried sample into a corundum boat, put it into a high-temperature furnace for calcination, slowly raise the temperature to 1100°C in an air atmosphere, keep it warm for 6 hours, then cool naturally, and finally grind to obtain tungst...

Embodiment 2

[0065] (1) According to the chemical formula Lu 2-0.4 Er 0.04 Yb 0.36 W 3 o 12 The stoichiometric ratio of Lu, Er, Yb and W in Lu, weighed Lu 2 o 3 , Yb 2 o 3 , WO 3 and Er 2 o 3 The corresponding quality and the purity of these raw materials are all 99.99%, and they are ground 2-3 times with absolute ethanol to make them evenly mixed.

[0066] (2) Place the ground sample in an oven at 80°C for two hours to dry, then put it into a corundum boat, then put the corundum boat with the sample into a high-temperature furnace for pre-burning, and keep it warm at 500°C in an air atmosphere 6 hours, then cool down to normal temperature naturally.

[0067] (3) Take out the sample from the high-temperature furnace, grind it with alcohol for 2-3 times, and then dry it.

[0068] (4) Put the dried sample into a corundum boat, put it into a high-temperature furnace for calcination, slowly raise the temperature to 1150°C in an air atmosphere, keep it warm for 6 hours, then cool na...

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Abstract

This application discloses a tungstate up-conversion luminescent material and its preparation method and application, and relates to the technical field of luminescent materials. The general chemical formula of the tungstate up-conversion luminescent material is A 2‑2x‑ 2y Er 2x Yb 2y W 3 o 12 , where A is one or more of the elements Al, Bi, Y, Lu, La, Gd and Dy, 0

Description

technical field [0001] The application relates to the technical field of luminescent materials, in particular to a tungstate up-conversion luminescent material and its preparation method and application. Background technique [0002] Rare-earth doped up-conversion luminescent material is a photoluminescent material that can convert multiple photons with longer wavelengths (low energy) into photons with shorter wavelengths (high energy). This nonlinear optical characteristic makes it unique in many fields and has high value. Its applications mainly include high-performance blue-green lasers, optical imaging of biological cells, high-efficiency solar cells, temperature sensors, 3D imaging, etc. [0003] Generally, rare earth-doped up-conversion luminescent materials are generally composed of three parts: a host material that provides a suitable crystal field for the luminescent center; The dopant ions that improve the overall luminous efficiency are called sensitizers. In ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
CPCC09K11/7776
Inventor 邹华王锋陈冰胡益丰朱小芹
Owner JIANGSU UNIV OF TECH
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