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Near-infrared long-afterglow luminescent material as well as preparation method and application thereof

A technology of luminescent materials and external length, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high cost, and achieve the effect of low cost, not easy to absorb moisture, and easy to realize

Active Publication Date: 2020-01-21
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These materials have strong afterglow strength and long afterglow time, but these materials contain a lot of expensive gallium and germanium elements

Method used

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  • Near-infrared long-afterglow luminescent material as well as preparation method and application thereof
  • Near-infrared long-afterglow luminescent material as well as preparation method and application thereof
  • Near-infrared long-afterglow luminescent material as well as preparation method and application thereof

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preparation example Construction

[0034] In addition, the present application also provides a preparation method for the above-mentioned near-infrared long-lasting luminescent material, which includes the following steps:

[0035] S1. Weigh the raw materials.

[0036] Weigh the raw material according to the following chemical composition expression, Zn 2–x–y TiO 4–x :Cr y , where -0.6≤x≤0.6; 0<y≤0.1, the raw materials include zinc-containing compounds, titanium-containing compounds and chromium-containing compounds. Wherein, the zinc-containing compound includes one or both of zinc oxide and zinc carbonate; the titanium-containing compound includes titanium dioxide; the chromium-containing compound includes one or more of chromium trioxide, chromium nitrate nonahydrate and chromium sulfate hexahydrate .

[0037] Grind the accurately weighed raw materials evenly in an ethanol solvent, specifically, grind the raw materials in an agate mortar or ball mill for 15-30 min. Grinding can crush the raw materials a...

Embodiment 1

[0045] Weigh zinc oxide (ZnO) 1.6265g, titanium dioxide (TiO 2 ) 0.7987g, chromium trioxide (Cr 2 o 3 ) 0.0015g and 5% boric acid (H 3 BO 3 ) 0.12g as a flux, put it in an agate mortar and grind it in an ethanol solvent for 20 minutes, mix it evenly, put it into a corundum crucible, put the corundum crucible into a high-temperature furnace, and roast it at a high temperature in an air atmosphere. The specific heating procedure is as follows : It takes 5 hours to raise the temperature from room temperature to 1500°C, keep the temperature for 5 hours, and then naturally cool to room temperature. The sample is taken out and ground to obtain the product, and its chemical composition expression is: Zn 1.999 TiO 4 :Cr 0.001 .

Embodiment 2

[0047] Weigh zinc oxide (ZnO) 1.4637g, titanium dioxide (TiO 2 ) 0.7987g, chromium trioxide (Cr 2 o 3 ) 0.0015g and 5% boric acid (H 3 BO 3 ) 0.12g as a flux, put it in an agate mortar and grind it in an ethanol solvent for 20 minutes and mix it evenly, then put it into a corundum crucible, put the corundum crucible into a high-temperature furnace and roast it at a high temperature in an air atmosphere. The specific heating procedure is as follows : It takes 5 hours to raise the temperature from room temperature to 1500°C, keep the temperature for 5 hours, and then naturally cool to room temperature. The sample is taken out and ground to obtain the product, and its chemical composition expression is: Zn 1.799 TiO 3.8 :Cr 0.001 .

[0048] from figure 1 It can be seen that the XRD of the sample is consistent with that of Zn 2 TiO 4 The standard cards match, thus proving that the synthesized material has an inverse spinel structure, and the schematic diagram of the unit...

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Abstract

The invention discloses a near-infrared long-afterglow luminescent material as well as a preparation method and application thereof, and relates to the field of near-infrared luminescent materials. The chemical composition expression of the near-infrared long-afterglow luminescent material is Zn<2-x-y>TiO<4-x>:Cry, wherein x is greater than or equal to -0.6 and less than or equal to 0.6; 0<y<= 0.1. Expensive gallium and germanium elements do not need to be used, and the long-lasting phosphor performance can be achieved. By regulating and controlling the proportion of a zinc-containing compoundin raw materials, the luminescence and afterglow intensity of the near-infrared long-afterglow luminescent material can be obviously enhanced. The near-infrared long-afterglow luminescent material provided by the invention is not easy to absorb moisture, can be stable in air for a long time, has good biological tissue penetrability, and can be widely applied to the field of biological imaging. The preparation method disclosed by the invention includes mixing the raw materials and roasting the mixture to obtain the near-infrared long-afterglow luminescent material, and is simple and easy to implement.

Description

technical field [0001] The invention relates to the field of near-infrared luminescent materials, in particular to a near-infrared long-lasting luminescent material and its preparation method and application. Background technique [0002] The near-infrared long-lasting luminescent material refers to a kind of long-lasting inorganic luminescent material that can continuously emit near-infrared light after stopping the excitation of ultraviolet and visible light. Common near-infrared long-lasting luminescent materials mainly include transition metal Cr 3+ Activated gallium / germanate such as ZnGa 2 o 4 , LiGa 5 o 8 , Ca 3 Ga 2 Ge 3 o 12 , Zn 3 Ga 2 GeO 8 and CaZnGe 2 o 6 wait. These materials have strong afterglow strength and long afterglow time, but these materials contain a lot of expensive gallium and germanium elements. Therefore, it is of great practical significance to study new low-cost (excluding gallium and germanium) near-infrared long-lasting material...

Claims

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Application Information

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IPC IPC(8): C09K11/67
CPCC09K11/682
Inventor 林利添倪海勇谢伟张秋红丁建红姜伟李许波
Owner GUANGDONG INST OF RARE METALS
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