Novel chromium-doped double-borate near-infrared fluorescent powder and light source prepared from novel chromium-doped double-borate near-infrared fluorescent powder

A bis-borate and near-infrared light technology, applied in the field of phosphors, can solve the problems of lack of miniaturization and achieve the effects of good thermal stability, feasible manufacturing method, and high thermal stability

Pending Publication Date: 2021-08-27
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This patent discloses a new type of Cr that has not been reported 3+ Doped bis-borate matrix broadband near-infrared phosphor and its prepared light source have the advantages of wide and adjustable emission wavelength, excellent thermal stability, and high luminous efficiency. Technical bottleneck of light source

Method used

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  • Novel chromium-doped double-borate near-infrared fluorescent powder and light source prepared from novel chromium-doped double-borate near-infrared fluorescent powder
  • Novel chromium-doped double-borate near-infrared fluorescent powder and light source prepared from novel chromium-doped double-borate near-infrared fluorescent powder
  • Novel chromium-doped double-borate near-infrared fluorescent powder and light source prepared from novel chromium-doped double-borate near-infrared fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] A new type of Cr 3+ Doped bis-borate structure broadband near-infrared phosphor, the material is solid powder, and the molecular formula is Y 0.99 Li 0.01 Ga 2.97 (BO 3 ) 4 :0.03Cr 3+ . The preparation method is as follows:

[0033] (1) Weigh Y according to the stoichiometric ratio 2 o 3 : 0.4201g, Li 2 CO 3 : 0.0013g, Ga 2 o 3 : 1.0463g, B 2 o 3 : 0.5234g, Cr 2 o 3 : 0.0085g. Mix the above raw materials thoroughly, add flux CaF 2 and P 2 o 5 0.1g each, grind evenly, and sieve.

[0034] (2) Put the mixture obtained above into a corundum crucible and move it into a resistance furnace, raise the temperature to 1000° C. for 5 hours at a heating rate of 5° C. / min, and then cool to room temperature with the furnace;

[0035] (3) After fully grinding the sintered product obtained in step (2), washing with absolute ethanol 3 times, drying and sieving, a new type of Cr 3+ Doped double borate structure broadband near-infrared phosphor.

[0036] The near-infr...

Embodiment approach 2

[0038] A new type of Cr 3+ Doped bis-borate structure broadband near-infrared phosphor, the material is solid powder, and the molecular formula is Y 0.99 Li 0.01 Ga 1.44 Al 1.5 (BO 3 ) 4 :0.06Cr 3+ . The preparation method is as follows:

[0039] (1) Weigh Y according to the stoichiometric ratio 2 o 3 : 0.2067g, Li 2 CO 3 : 0.0006g, Al(NO 3 ) 3 9H 2 O: 1.0409g, Ga 2 o 3 : 0.2496g, H 3 BO 3 : 0.4575g, Cr(NO 3 ) 3 9H 2 O: 0.0444g. Mix the above raw materials thoroughly, add flux CaF 2 and NH 4 F each 0.02g, grind evenly, and sieve.

[0040] (2) Put the mixture obtained above into a corundum crucible and move it into a resistance furnace, raise the temperature to 1200° C. for 6 hours at a heating rate of 5° C. / min, and then cool to room temperature with the furnace;

[0041] (3) After fully grinding the sintered product obtained in step (2), washing with absolute ethanol 4 times, drying and sieving, a new type of Cr 3+ Doped garnet structure broadband ne...

Embodiment approach 3

[0044] A new type of Cr 3+ Doped bis-borate structure broadband near-infrared phosphor, the material is solid powder, and the molecular formula is Y 0.99 Na 0.01 In 2.94 (BO 3 ) 4 :0.06Cr 3+ . The preparation method is as follows:

[0045] (1) Weigh Y according to the stoichiometric ratio 2 o 3 : 0.3366g, NaNO 3 : 0.0012g, In 2 o 3 : 1.2290g, B 2 o 3 : 0.4193g, Cr 2 o 3 : 0.0137g. Mix the above raw materials thoroughly, add flux P 2 o 5 : 0.0286g and NH 4 F: 0.05g, ground evenly, and sieved.

[0046] (2) Put the mixture obtained above into a corundum crucible and move it into a resistance furnace, raise the temperature to 1200° C. for 4 hours at a heating rate of 6° C. / min, and then cool to room temperature with the furnace;

[0047] (3) After fully grinding the sintered product obtained in step (2), washing with absolute ethanol 3 times, drying and sieving, a new type of Cr 3+ Doped double borate structure broadband near-infrared phosphor.

[0048] The n...

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Abstract

The invention discloses novel Cr < 3 + > doped double borate structure near-infrared fluorescent powder and a preparation method of a near-infrared light source. The general chemical formula of the fluorescent powder is Y1-x-bMx (NyAlz) 3-a (BO3) 4: aCr < 3 + >, bRE (0 < x < 1, 0 < = y < 1, 0 < = z < 1, y + z = 1, 0 < a < = 0.5, 0 < b < 0.2); wherein M is one or a combination of more of Li < + >, K < + >, Na < + > and the like; N is one or a combination of more of Lu, Ga, Gd, Sc, In and the like; RE is one or a combination of more of Yb < 3 + >, Nd < 3 + >, Dy < 3 + >, Er < 3 + > and Pr < 3 + >; and Cr < 3 + > is a luminous ion. The prepared fluorescent powder can be effectively excited by blue light or ultraviolet light, and a near-infrared light source obtained after packaging has strong broadband near-infrared emission, so that the fluorescent powder can be widely applied to the fields of plant illumination, food detection and the like.

Description

technical field [0001] The invention relates to a kind of fluorescent powder used in the field of luminescence, in particular to a near-infrared luminescent material converted from the fluorescent powder and its application in the fields of plant lighting and food detection. Background technique [0002] Near-infrared spectroscopy has been widely used in many fields such as military, food inspection, medical treatment, face recognition, security monitoring, unmanned driving and agriculture due to its advantages of fast and non-destructive detection. Recently, researchers have proposed an integrated, miniaturized, and efficient near-infrared light source to detect the freshness and safety of meat, fruits, and vegetables. This light source has the advantages of small size, energy saving, fast response, and high efficiency, and is expected to become a promising light source used in smartphones. At present, the common near-infrared light sources on the market mainly include inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80C09K11/78H01L33/50
CPCC09K11/778C09K11/7712H01L33/502
Inventor 叶信宇陈广韩磊聂文东王薇杨幼明廖臣兴赵玉磊钟奕晖
Owner JIANGXI UNIV OF SCI & TECH
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