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Cr<3+>-doped tin-containing mixed spinel near-infrared long-afterglow luminescent material and preparation method thereof

A luminescent material, spinel technology, applied in luminescent materials, chemical instruments and methods, etc., to achieve the effects of low equipment requirements, strong afterglow intensity, and extended selectivity

Inactive Publication Date: 2018-12-14
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is precisely because this anti-site defect acts as a trap for storing carriers that the modified material has better afterglow intensity and time, but there is still a long way to go from practical applications.

Method used

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  • Cr&lt;3+&gt;-doped tin-containing mixed spinel near-infrared long-afterglow luminescent material and preparation method thereof
  • Cr&lt;3+&gt;-doped tin-containing mixed spinel near-infrared long-afterglow luminescent material and preparation method thereof
  • Cr&lt;3+&gt;-doped tin-containing mixed spinel near-infrared long-afterglow luminescent material and preparation method thereof

Examples

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Embodiment 1

[0023] a Cr 3+ Doped tin-containing mixed spinel structure near-infrared long afterglow material, the material is in powder form, and the molecular formula is as follows: Zn 10 Ga 15.36 SnO 36 :0.08Cr 3+ . The preparation method is as follows: according to the molecular formula ratio, zinc oxide, gallium oxide, tin oxide, and chromium oxide with a purity of more than 99.9% are used as raw materials, and the specific masses are 1.0093g, 1.7851g, 0.1871g, and 0.0075g respectively. Grind the above raw material mixture evenly in an agate mortar, put it into a corundum crucible, raise the temperature to 1350°C at a rate of 10°C / min in an inert nitrogen atmosphere, keep it warm for 8 hours, and then cool it down to room temperature with the furnace . It can be seen from the XRD pattern that the material is a spinel phase, and its excitation and emission spectra are shown in figure 1 As shown in the figure, the solid line part is the excitation spectrum, and the dotted line is ...

Embodiment 2

[0025] a Cr 3+ Doped tin-containing mixed spinel structure near-infrared long afterglow material, the material is in powder form, and the molecular formula is as follows: Zn 12 Ga 19 SnO 44 :0.1Cr 3+ . The preparation method is as follows: according to the molecular formula ratio, zinc oxide, gallium oxide, tin oxide, and chromium oxide with a purity of more than 99.9% are used as raw materials, and the specific masses are 0.9768g, 1.7808g, 0.1509g, and 0.0076g respectively. Grind the above raw material mixture evenly in an agate mortar, put it into a corundum crucible, raise the temperature to 900°C at a heating rate of 10°C / min in an air atmosphere, keep it for 8 hours, and then cool it to room temperature with the furnace. The pre-fired sample was taken out and ground again, and then heated up to 1350°C at a rate of 10°C / min for calcination, kept for 8 hours and then cooled to room temperature with the furnace. The obtained material is a spinel phase, the emission wave...

Embodiment 3

[0027] a Cr 3+ Doped tin-containing mixed spinel structure near-infrared long afterglow material, the material is in powder form, and the molecular formula is as follows: Zn 8 Ga 11.64 SnO 28 :0.06Cr 3+ . The preparation method is as follows: according to the ratio of the molecular formula, zinc oxide, gallium oxide, tin oxide, and chromium oxide with a purity of more than 99.9% are used as raw materials, and the specific masses are 1.0158g, 1.7019g, 0.2353g, and 0.0071g respectively. Grind the above-mentioned raw material mixture evenly in an agate mortar, put it into a corundum crucible, raise the temperature to 1400°C at a rate of 15°C / min in an air atmosphere, keep it for 12 hours, and then cool it to room temperature with the furnace. The obtained material is a spinel phase, the emission wavelength range is between 600-850nm, the emission peak is at about 696nm, and the afterglow can last for more than 24h.

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Abstract

The invention discloses a Cr<3+>-doped tin-containing mixed spinel near-infrared long-afterglow luminescent material and a preparation method thereof, and belongs to the technical field of long-afterglow luminescent materials. The preparation method of the luminescent material comprises the following steps: uniformly mixing a zinc-containing compound, a gallium-containing compound, a tin-containing compound and a chromium-containing compound by grinding to obtain a precursor, then putting into a crucible, putting into a high-temperature furnace in an air or nitrogen atmosphere, raising the temperature to 1100-1400 DEG C, roasting for 1-3 times, and crushing and grinding an obtained roasted product to obtain the Cr<3+>-doped tin-containing mixed spinel matrix near-infrared long-afterglow luminescent material. Through adoption of a technology, the selectability of the long-afterglow material to a matrix is greatly expanded, the performance of a near-infrared red-afterglow material is improved, the raw material cost is low, simpleness and feasibility are achieved, an equipment requirement is low, and high-temperature sintering at 1400 DEG C does not cause melting vitrification. The long-afterglow luminescent material has an emission range in a near-infrared region, and has the excellent properties of strong afterglow intensity, long afterglow time and the like.

Description

technical field [0001] The invention belongs to the technical field of long-lasting luminescent materials, and relates to a near-infrared long-lasting phosphor and a preparation method thereof; in particular, a Cr 3+ The doped tin-containing mixed spinel near-infrared long-lasting luminescent material and its preparation method can be used in the fields of indicating lighting and imaging detection. Background technique [0002] Long afterglow luminescent material is a luminescent material that can absorb and store external light radiation energy 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, among which the opti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66
CPCC09K11/68
Inventor 潘再法王锴邵康严丽萍闻莹婷林静
Owner ZHEJIANG UNIV OF TECH
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