Cr < 3 + >-doped gallium aluminate near-infrared long-afterglow luminescent material and preparation method thereof

A luminescent material, aluminate technology, applied in luminescent materials, chemical instruments and methods, etc., to achieve the effect of simple and feasible operation, improving development space, and expanding selectivity

Active Publication Date: 2021-06-01
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is precisely because this antisite defect acts as a trap for storing carriers that the material has good afterglow intensity and afterglow time, but there is still a long way to go in practical applications.

Method used

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  • Cr &lt; 3 + &gt;-doped gallium aluminate near-infrared long-afterglow luminescent material and preparation method thereof
  • Cr &lt; 3 + &gt;-doped gallium aluminate near-infrared long-afterglow luminescent material and preparation method thereof
  • Cr &lt; 3 + &gt;-doped gallium aluminate near-infrared long-afterglow luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a Cr 3+ Doped galloaluminate near-infrared long afterglow material, the material is in powder form, and the molecular formula is as follows: Zn 3 Ga 2 Ge 2 o 10 : 0.5%Cr 3+ . The preparation method is as follows:

[0024] According to the ratio of the molecular formula, using zinc oxide, gallium oxide, germanium oxide, and chromium oxide with a purity of more than 99.9% as raw materials, the specific masses of zinc oxide, gallium oxide, germanium oxide, and chromium oxide are 19.0572g, 14.5534g, and 16.3302g respectively. g, 0.0593g. And add 0.05wt% NH 4 F flux, use an agate mortar to grind and mix evenly to obtain a precursor, add an appropriate amount of absolute ethanol to the above precursor in an agate mortar, grind evenly, put it into a corundum crucible, and in an air atmosphere, at 100 ° C / h The heating rate was raised to 950°C, kept warm and calcined for 2 hours, then cooled to room temperature with the furnace, the sample was placed in an agate mort...

Embodiment 2

[0026] a Cr 3+ Doped galloaluminate near-infrared long afterglow material, the material is in powder form, and the molecular formula is as follows: Zn 3Ga 1.5 Al 0.5 Ge 2 o 10 : 0.5%Cr 3+ . The preparation method is as follows:

[0027] According to the calculation ratio of the molecular formula, zinc oxide, gallium oxide, aluminum oxide, germanium oxide, and chromium oxide with a purity of more than 99.9% are used as raw materials, and the specific masses of zinc oxide, gallium oxide, aluminum oxide, germanium oxide, and chromium oxide are respectively 3.9423 g, 2.2579g, 0.4094g, 3.3780g, 0.0123g. And add 0.05wt% NH 4 F flux, use an agate mortar to grind and mix evenly to obtain a precursor, add an appropriate amount of absolute ethanol to the above precursor in an agate mortar, grind evenly, put it into a corundum crucible, and in an air atmosphere, at 100 ° C / h The heating rate was raised to 950°C, kept warm and calcined for 2 hours, then cooled to room temperat...

Embodiment 3

[0029] a Cr 3+ Doped gallium aluminate near-infrared long afterglow material, the material is in powder form, and the molecular formula is as follows: Zn 3 GaAlGe 2 o 10 : 0.5%Cr 3+ . The preparation method is as follows:

[0030] According to the calculation ratio of the molecular formula, zinc oxide, gallium oxide, aluminum oxide, germanium oxide, and chromium oxide with a purity of more than 99.9% are used as raw materials, and the specific masses of zinc oxide, gallium oxide, aluminum oxide, germanium oxide, and chromium oxide are respectively 4.0825 g, 1.5587g, 0.8480g, 3.4982g, 0.0126g. Will and add 0.05wt% NH 4 F flux, use an agate mortar to grind and mix evenly to obtain a precursor, add an appropriate amount of absolute ethanol to the above precursor in an agate mortar, grind evenly, put it into a corundum crucible, and in an air atmosphere, at 100 ° C / h The heating rate was raised to 950°C, kept warm and calcined for 2 hours, then cooled to room temperature...

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Abstract

The invention discloses a Cr < 3 + >-doped gallium aluminate near-infrared long-afterglow luminescent material and a preparation method thereof. The general chemical formula of the near-infrared long-afterglow luminescent material is Zn3GaxAl2-xGaeTibSn2-a-bO10: yCr < 3 + >. The preparation method comprises the following steps: weighing the raw materials according to the molar ratio of the substances in the equation, adding the fluxing agent, grinding in an agate mortar, and uniformly mixing to obtain a precursor; putting the precursor into an alumina crucible, and pre-sintering in an air or neutral atmosphere; and grinding and uniformly mixing a sample obtained by presintering, and calcining in air or neutral atmosphere to obtain the Cr < 3 + > gallium aluminate near-infrared long-afterglow luminescent material. The near-infrared long-afterglow fluorescent powder disclosed by the invention has the advantages of low raw material cost, simplicity and feasibility in operation, low requirements on equipment and the like. The long-afterglow luminescent material has the advantages that the emission range is located in a near-infrared region, and the long-afterglow luminescent material is long in afterglow time and the like.

Description

technical field [0001] The invention relates to a near-infrared long afterglow phosphor and a preparation method thereof, in particular to a phosphor for Cr 3+ The doped gallium aluminate near-infrared long-lasting luminescent material and a preparation method thereof can be used in the fields of indicating lighting and imaging detection, and belong to the technical field of long-lasting luminescent materials. Background technique [0002] Long afterglow luminescent material is a luminescent material that can absorb - store the energy of external light radiation and slowly release light. This feature is widely used in indicating lighting, such as emergency exit signs, fire exits, architectural decoration and other fields, and has recently been gradually extended to biological imaging, information storage and other application fields. The existing long afterglow materials in the visible light region are mainly divided into blue light, green light and red light materials, amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
CPCC09K11/682
Inventor 张彦刘家文王占勇徐家跃龚震黄礼武
Owner SHANGHAI INST OF TECH
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