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Chromium and neodymium co-doped gadolinium gallate near-infrared long-afterglow material and preparation method thereof

A gallium acid and foreign long-term technology, which is applied in the direction of luminescent materials, material excitation analysis, chemical instruments and methods, etc., can solve the problems that the luminescent band of long-lasting materials stays in the visible region, and the research on near-infrared luminescent long-lasting materials is less

Active Publication Date: 2015-06-03
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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  • Chromium and neodymium co-doped gadolinium gallate near-infrared long-afterglow material and preparation method thereof
  • Chromium and neodymium co-doped gadolinium gallate near-infrared long-afterglow material and preparation method thereof
  • Chromium and neodymium co-doped gadolinium gallate near-infrared long-afterglow material and preparation method thereof

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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] According to the following ingredients: 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 Applications(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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