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A kind of near-infrared long afterglow material of gadolinium gallate co-doped with chromium and neodymium and its preparation method

A technology of gallic acid and foreign minister, which is applied in the fields of luminescent materials, material excitation analysis, chemical instruments and methods, etc., can solve the problems of less research on near-infrared luminescent long afterglow materials, and the luminous band of long afterglow materials stays in the visible region.

Active Publication Date: 2016-10-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, so far, most of the luminescent bands of long-lasting materials stay in the visible region, and there are relatively few studies on near-infrared luminescent long-lasting materials.

Method used

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  • A kind of near-infrared long afterglow material of gadolinium gallate co-doped with chromium and neodymium and its preparation method
  • A kind of near-infrared long afterglow material of gadolinium gallate co-doped with chromium and neodymium and its preparation method
  • A kind of near-infrared long afterglow material of gadolinium gallate co-doped with chromium and neodymium and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0025] According to the following composition: GdGa 3 o 6 : 0.001Cr, 0.001Nd, namely GdGa 3 o 6 Doped with 0.1mol% Cr and 0.1mol% Nd; weighed gadolinium oxide, gallium oxide, chromium oxide, and neodymium oxide respectively, ground and mixed them, pre-fired at 1000°C for 3 hours, took them out, and ground them again , fired at 1500°C for 3 hours.

[0026] The near-infrared fluorescence spectrum of the sample prepared in this embodiment is as follows: figure 1 As shown, under the excitation of 460nm, the luminescence of 1064nm is emitted, and this long afterglow is the luminescence of Nd3+. The luminescence at 1064nm corresponds to the excitation peak as figure 1 The excitation spectrum is shown on the left. figure 2 The near-infrared long afterglow spectrum of the long afterglow material is shown for 1 minute after being exposed to sunlight for 10 minutes, indicating that the material has long afterglow characteristics. image 3 The samples prepared for this example we...

Embodiment 2

[0028] Follow the ingredients below: Gd 3 Ga 5 o 12 : 0.005Cr, 0.02Nd, namely Gd 3 Ga 5 o 12 Doped with 0.5mol% Cr and 2mol% Nd, respectively weighed gadolinium nitrate, gallium oxide, chromium fluoride, and neodymium fluoride, ground and mixed them, pre-fired at 800°C for 4 hours, took them out, and ground them again After that, it was fired at 1450°C for 4 hours.

[0029] Figure 5 The sample prepared for this example was irradiated under sunlight for 10 minutes to monitor the afterglow decay spectrum at 1064nm, which shows that the material of this example has a long near-infrared afterglow for a certain period of time.

Embodiment 3

[0031] According to the following composition: GdGa 7 o 12 : 0.015Cr, 0.005Nd, namely GdGa 7 o 12 Doped with 1.5% mol of Cr and 0.5% mol of Nd; Weigh gallium nitrate, gallium oxide, chromium oxide, and neodymium oxide respectively, after grinding and mixing, pre-burn at 800°C for 5 hours, take out, and grind again , fired at 1500°C for 5 hours.

[0032] Image 6 The sample prepared for this example was irradiated under sunlight for 10 minutes to monitor the afterglow decay spectrum at 1064nm, which shows that the material of this example has a long near-infrared afterglow for a certain period of time.

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Abstract

The invention discloses a chromium and neodymium co-doped gadolinium gallate near-infrared long-afterglow material. The general structural formula is Gdx-mGay-nO(1.5x+1.5y):nCr, mNd, wherein x is more than or equal to 1 and less than or equal to 3, y is more than or equal to 1 and less than or equal to 7, n is more than or equal to 0.001 and less than or equal to 0.02, and m is more than or equal to 0.001 and less than or equal to 0.02. The invention also discloses a method for preparing the near-infrared long-afterglow material. The near-infrared long-afterglow material disclosed by the invention emits near-infrared long afterglow at the wave band of 650-1400nm, and the emission peaks are respectively positioned at 710nm and 1064nm and have a certain afterglow luminous time.

Description

technical field [0001] The invention relates to a near-infrared long afterglow luminescent material, in particular to a near-infrared long afterglow material of gadolinium gallate co-doped with chromium and neodymium and a preparation method thereof. Background technique [0002] Long afterglow luminescence phenomenon, commonly known as luminous phenomenon, is an optical phenomenon that is exposed to high-energy radiation, especially ultraviolet radiation, and can continue to emit light after the radiation stops. Since the discovery of long-lasting luminescence in the early 20th century, due to its special luminous effect, the development of long-lasting materials has made great progress. Especially in recent years, with the continuous discovery and performance improvement of new long-lasting luminescent materials, its application fields have become more and more extensive, and some breakthroughs have been made in the study of long-lasting luminescent materials and their lum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80G01N21/64
Inventor 邱建荣秦嬉嬉李杨
Owner SOUTH CHINA UNIV OF TECH
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