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Blue-light fluorescent powder in LED device for treatment of neonatal jaundice, and synthetic method thereof

A synthesis method and technology for blue phosphors, which are applied in the field of rare earth doped phosphors, can solve the problems of great harm to newborns, are not environmentally friendly, unfavorable to health, etc., and achieve short synthesis time, simple synthesis method, and improved energy utilization and efficiency. safety effect

Active Publication Date: 2017-02-15
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, this wastes a certain amount of energy and is not environmentally friendly
Secondly, ultraviolet radiation is more harmful to newborns, which is not conducive to health.

Method used

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  • Blue-light fluorescent powder in LED device for treatment of neonatal jaundice, and synthetic method thereof
  • Blue-light fluorescent powder in LED device for treatment of neonatal jaundice, and synthetic method thereof
  • Blue-light fluorescent powder in LED device for treatment of neonatal jaundice, and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the preparation of blue fluorescent powder

[0018] 0.01mol of MgO, 0.02mol of NH 4 Cl, 0.03mol of SiO 2 and 1.2×10 —4 mol (0.3mol%) of Eu 2 o 3 Grind in an agate mortar for 1 hour until well mixed. Put it into a ceramic crucible, then heat it to 1000°C in a high-temperature furnace, keep it warm for 2 hours, and then cool it down naturally. After taking out the sample, put it into an agate mortar, and then add 0.02mol of NH 4 Cl, grind until thoroughly mixed. Then put it into a ceramic crucible, put it into a tubular reduction furnace, and 2 :N 2 In a reducing atmosphere with a volume ratio of 1:9, heat it to 1000°C, keep it warm for 2 hours, then cool it naturally, take it out and grind it for subsequent testing. The XRD diffraction peaks of the product are as figure 1 Shown; fluorescence excitation spectrum as figure 2 Shown; fluorescence emission spectrum as image 3 Shown; Fluorescence emission variable temperature spectrum as Figure 4 ...

Embodiment 2

[0019] Embodiment 2: the preparation of blue fluorescent powder

[0020] 0.01mol of MgO, 0.02mol of NH 4 Cl, 0.03mol of SiO 2 and 2.4×10 —4 mol (0.6mol%) of Eu 2 o 3 Grind in an agate mortar for 1 hour until well mixed. Put it into a ceramic crucible, then heat it to 1000°C in a high-temperature furnace, keep it warm for 2 hours, and then cool it down naturally. After taking out the sample, put it into an agate mortar, and then add 0.02mol of NH 4 Cl, grind until thoroughly mixed. Then put it into a ceramic crucible, put it into a tubular reduction furnace, and 2 :N 2 In a reducing atmosphere with a volume ratio of 1:9, heat it to 1000°C, keep it warm for 2 hours, then cool it down naturally, take it out and grind it for subsequent testing. The XRD diffraction peaks of the product are as figure 1 shown. Such as figure 1 As shown in the middle line 2, all the diffraction peaks can correspond to the standard peaks of the α-quartz structure at the bottom (JCPDS No.46-...

Embodiment 3

[0021] Embodiment 3: the preparation of blue fluorescent powder

[0022] 0.01mol of MgO, 0.02mol of NH 4 Cl, 0.03mol of SiO 2 and 1.2×10 —4 mol (0.3mol%) of Eu 2 o 3 Grind in an agate mortar for 1 hour until well mixed. Put it into a ceramic crucible, then heat it to 900°C in a high-temperature furnace, keep it warm for 2 hours, and then cool it down naturally. After taking out the sample, put it into an agate mortar, and then add 0.02mol of NH 4 Cl, grind until thoroughly mixed. Then put it into a ceramic crucible, put it into a tubular reduction furnace, and put it in the H 2 :N 2 In a reducing atmosphere with a volume ratio of 2:8, heat it to 900°C, keep it warm for 1.5 hours, then cool it naturally, take it out and grind it for subsequent testing. The XRD diffraction peaks of the product are as figure 1 shown. Such as figure 1 As shown in the middle line 3, all the diffraction peaks can correspond to the standard peak of the α-quartz structure at the bottom (JC...

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Abstract

The invention provides a blue-light fluorescent powder in an LED device for the treatment of neonatal jaundice, and a synthetic method thereof. The chemical composition formula of the blue-light fluorescent powder is SiO2-Mg1xCl2: Eu<2+>x, wherein 0.001<=x<=0.90. The synthetic method of the above blue-light fluorescent powder comprises the steps of calcinating MgO, SiO2 and Eu2O3 at 500-1000 DEG C in the air atmosphere for 1 to 5 hours to form a fluorescent powder A; grinding the fluorescent powder A, and calcinating the ground fluorescent powder A at 500-1000 DEG C in the reducing atmosphere for 1 to 5 hours to form the final blue-light fluorescent powder. The above reactions are conducted in a ceramic crucible and a tube-type reducing furnace. Firstly, the obtained fluorescent powder is of a quartz-type structure, and the raw materials of the fluorescent powder are non-toxic, cheap and easy to obtain. The synthetic method of the fluorescent powder is conducted based on the high-temperature solid-phase reaction, and has the advantages of simple synthetic method, short synthesis time and the like. Secondly, the ultraviolet content of a product of the invention accounts for less than a thousandth of the overall fluorescence emission quantity thereof. The radiation range required for the illumination treatment of neonatal jaundice is perfectly covered. Meanwhile, the energy utilization rate and the safety are improved.

Description

technical field [0001] The invention belongs to rare earth-doped fluorescent powder of inorganic materials, and in particular relates to a blue-light fluorescent powder used in LED devices for treating neonatal jaundice and a synthesis method thereof. Background technique [0002] Light therapy is a method in the treatment of neonatal jaundice. Because phototherapy is not as toxic to the newborn as drug therapy, nor is it as physically taxing on the newborn as exchange transfusion, it is the most commonly used method in the treatment of neonatal jaundice. Blue light is used in phototherapy. As a blue light source, the most commonly used LED device is a combination of blue phosphor powder and an excitation chip. Therefore, the development of blue phosphors has broad application prospects. [0003] The skin of newborns with jaundice first absorbs blue light, and then the blue light oxidizes the bilirubin in the skin, making it produce a more polar oxide that can be excreted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61H01L33/50A61N5/06
CPCA61N5/0621H01L33/502C09K11/7734A61N2005/0651Y02P20/10
Inventor 石建新郭振斌吴明娒
Owner SUN YAT SEN UNIV
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