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Near-infrared fluorescent powder as well as preparation method and application thereof

A near-infrared and phosphor technology, applied in the field of near-infrared phosphors, can solve the problem that the emission spectrum cannot meet the requirements for use, and achieve the effects of being convenient for large-scale production and popularization and application, mature in structure, and short in preparation time.

Inactive Publication Date: 2021-06-25
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The new broadband infrared LED from OSRAM Opto Semiconductors applies phosphor technology to the infrared emitter for the first time, creating infrared spectroscopy technology suitable for the consumer market, and is used in the food industry, agriculture and other industries to measure moisture in food, Fat, carbohydrates, sugar or protein content, etc.; however, this technology relies on near-infrared phosphors that can emit a broad spectrum, and most of the emission spectra of near-infrared phosphors currently do not meet the requirements for their use. Therefore, research and development in the industry It is necessary for personnel to develop more near-infrared phosphors with a wide emission spectrum, to provide more material options for near-infrared phosphors required by OSRAM light beads, and to provide more near-infrared phosphors for food detection, biological detection, and biological imaging. multiple choice

Method used

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  • Near-infrared fluorescent powder as well as preparation method and application thereof
  • Near-infrared fluorescent powder as well as preparation method and application thereof
  • Near-infrared fluorescent powder as well as preparation method and application thereof

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preparation example Construction

[0046] The application provides a preparation method of near-infrared fluorescent powder, comprising the following steps:

[0047] mixing a compound containing La, a compound containing M, a compound containing Sc, a compound containing B and a compound containing Cr to obtain a mixture;

[0048] The mixture is sintered to obtain near-infrared fluorescent powder.

[0049] According to the above-mentioned method provided by the present invention, the preparation method of the near-infrared fluorescent powder of the present application is simple in process, low in cost, and easy to industrialized production.

[0050] According to the element composition of the obtained near-infrared fluorescent powder, the molar ratio of the compound containing La, the compound containing M, the compound containing Sc, the compound containing B and the compound containing Cr is (0.64~0.83): (0.24~ 0.648): (2.71-2.88): (4.00-4.10): (0.002-0.05).

[0051] For the selection of the above compounds...

Embodiment 1

[0064] La 2 o 3 (analytical pure), Y 2 o 3 (analytical pure), Sc 2 o 3 (analytical pure), H 3 BO 3 (analytical pure) and Cr 2 o 3 (99.99%) as raw materials, according to the molar ratio of 0.64:0.648:2.71:8:0.002, accurately weigh the above substances, and fully grind them evenly in an agate mortar, put them into a corundum crucible, and place them in a box furnace in an air atmosphere Roast at 1150°C for 10 hours, cool naturally to room temperature, and then grind to obtain a light green powder sample whose chemical composition is La 0.64 Y 0.648 sc 2.71 (BO 3 ) 4:0.002Cr 3+ . After testing, La 0.64 Y 0.648 sc 2.71 (BO 3 ) 4 :0.002Cr 3+ Its chemical properties are stable, non-radioactive, and will not cause harm to the environment; its excitation band is wide and can be effectively excited by light in the 250-650nm band; its emission spectrum has a broad peak of 650nm-1200nm, and the main emission peak is located near 850nm.

[0065] Carry out X-ray diffr...

Embodiment 2

[0067] La 2 o 3 (analytical pure), Gd 2 o 3 (analytical pure), Sc 2 o 3 (analytical pure), H 3 BO 3 (analytical pure) and Cr 2 o 3 (99.99%) as a raw material, according to the molar ratio of 0.64:0.43:2.88:8:0.05, accurately weigh the above substances, and fully grind them evenly in an agate mortar, put them into a corundum crucible, and place them in a box furnace in air Calcined at 1150°C for 10 hours in the atmosphere, cooled naturally to room temperature, and then ground to obtain a light green powder sample whose chemical composition is La 0.64 Gd 0.43 sc 2.88 (BO 3 ) 4 :0.05Cr 3+ . After testing, La 0.64 Gd 0.43 sc 2.88 (BO 3 ) 4 :0.05Cr 3+ Its chemical properties are stable, non-radioactive, and will not cause harm to the environment; its excitation band is wide and can be effectively excited by light in the 250-650nm band; its emission spectrum has a broad peak of 650nm-1200nm, and the main emission peak is located near 850nm.

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Abstract

The invention provides near-infrared fluorescent powder as shown in a formula of LaxM4-x-y-zScy(BO3)4Cl: zCr<3+>. The invention also provides a preparation method and an application of the near-infrared fluorescent powder. The near-infrared fluorescent powder provided by the invention takes borate as a matrix and Cr<3+> ions as active ions, is stable in chemical property, wide in excitation band and not easy to absorb by organisms; the emission spectrum is wide-spectrum emission, the wavelength covers 650-1200 nm, broadband near-infrared fluorescent powder is coated on the recognized most efficient blue light LED chip, and the near-infrared fluorescent powder is excited by blue light to realize broadband near-infrared emission. The near-infrared fluorescent powder provided by the invention is mature in structure, low in price and wide in spectrum band, more material choices are provided for the near-infrared fluorescent powder required by Oleans lamp beads, and more choices are provided for using the near-infrared fluorescent powder in food detection, biological detection and organism imaging.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a near-infrared fluorescent powder, its preparation method and its application. Background technique [0002] In recent years, scientific researchers have put forward the idea of ​​integrating near-infrared spectroscopy technology into portable devices such as mobile phones, so as to realize the detection of food nutrients and human body status at any time. This technology has the characteristics of rapid and non-destructive detection, and plays an important role in solving food safety problems, healthy diet problems, and early diagnosis of cancer. The basic principle of this technology is to use broadband near-infrared light to irradiate the measured object, and the substances contained in the measured object will absorb specific light bands, causing changes in the scattering spectrum, and then calculate the type and value of the specific substance according to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78G01N21/64A61K49/00
CPCA61K49/0019C09K11/778G01N21/6428
Inventor 李成宇武海燕姜丽宏庞然张粟李达刘贯宇
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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