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Preparation method of ultraviolet light source based on up-conversion fluorescent powder light conversion

A phosphor, light conversion technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as high cost and complex preparation process

Pending Publication Date: 2021-03-26
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the preparation process of ultraviolet light-emitting diode products is complicated and the cost is high. Therefore, the development of a new type of ultraviolet light source that is easy to obtain and low in cost can provide a new choice for the development of ultraviolet light technology.

Method used

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  • Preparation method of ultraviolet light source based on up-conversion fluorescent powder light conversion
  • Preparation method of ultraviolet light source based on up-conversion fluorescent powder light conversion
  • Preparation method of ultraviolet light source based on up-conversion fluorescent powder light conversion

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preparation example Construction

[0024] The invention provides a method for preparing an ultraviolet light source based on up-conversion phosphor photoconversion, comprising the following steps:

[0025] mixing the ultraviolet phosphor with the inorganic binder to obtain the ultraviolet phosphor slurry;

[0026] Coating the UV phosphor slurry on one side of the substrate, drying and firing in sequence to obtain a UV phosphor coating, the UV phosphor coating includes a substrate and a substrate attached to one side of the substrate UV phosphor ceramic film;

[0027] Using a blue light excitation source to irradiate the side of the ultraviolet phosphor smear attached with the ultraviolet phosphor ceramic film, and generate ultraviolet emission on the other side of the ultraviolet phosphor smear;

[0028] Wherein, the ultraviolet phosphor comprises Lu 1-x PR x BO 3 、Lu 2 Gd 1-y PR y Al 2 Ga 3 o 12 or La 1-z T m z MgAl 11 o 19 , the x, y and z are independently 0.001 to 0.1;

[0029] The wavelength...

Embodiment 1

[0051] Preparation of Lu 2 Gd 0.99 PR 0.01 Al 2 Ga 3 o 12 Powder, comprising the following steps:

[0052] Accurately weigh 1.1195g lutetium oxide (Lu 2 o 3 ), 0.7647g gallium oxide (Ga 2 o 3 ), 0.3073g alumina (Al 2 o 3 ), 0.0048g praseodymium oxide (Pr 6 o 11 ) and 0.5098g gadolinium oxide (Gd 2 o 3 ), each raw material was ground in an agate mortar for 1h to obtain a mixed raw material; the mixed raw material was poured into a mold with a diameter of 13mm, and pressed for 300s with a pressure of 8T with an electric press to obtain a compressed tablet; The chips were placed in a high-temperature sintering furnace and sintered at 1300 °C for 3 h to obtain Lu 2 Gd 0.99 PR 0.01 Al 2 Ga 3 o 12 Powder.

[0053] Based on the Lu 2 Gd 0.99 PR 0.01 Al 2 Ga 3 o 12 The powder preparation ultraviolet light source comprises the following steps:

[0054] the Lu 2 Gd 0.99 PR 0.01 Al 2 Ga 3 o 12 Powder and SiO 2 The sol is mixed evenly at a mass ratio of 5...

Embodiment 2

[0066] With reference to the method of embodiment 1, with Lu 2 o 3 、Pr 6 o 11 and B 2 o 3 As raw material, after grinding, pressing and sintering, Lu 0.99 PR 0.01 BO 3 powder; then based on the Lu 0.99 PR 0.01 BO 3 Powder preparation of UV phosphor smears;

[0067] A 450nm blue laser (output power of 1W) is used to irradiate the side of the ultraviolet phosphor smear attached with the ultraviolet phosphor ceramic film, and 255nm ultraviolet light is emitted on the other side of the ultraviolet phosphor smear.

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Abstract

The invention provides a preparation method of an ultraviolet light source based on up-conversion fluorescent powder light conversion, and belongs to the technical field of ultraviolet light source design. The preparation method comprises the following steps: mixing ultraviolet fluorescent powder with an inorganic binder to obtain ultraviolet fluorescent powder slurry; coating one side of a substrate with the ultraviolet fluorescent powder slurry, and drying and roasting to obtain an ultraviolet fluorescent powder smear which comprises the substrate and an ultraviolet fluorescent powder ceramic film attached to one side of the substrate; irradiating one surface of the ultraviolet fluorescent powder smear attached with the ultraviolet fluorescent powder ceramic film by adopting a blue lightexcitation source, and generating ultraviolet emission on the other surface of the ultraviolet fluorescent powder smear; wherein the ultraviolet fluorescent powder comprises Lu<1-x>Pr<x>BO<3>, Lu<2>Gd<1-y>Pr<y>Al<2>Ga<3>O<12> or La<1-z>Tm MgAl<11>O<19>, and x, y and z are independently in a range of 0.001 to 0.1; and the wavelength of the blue light excitation source is 440-490nm. The method is simple in process and low in cost.

Description

technical field [0001] The invention relates to the technical field of ultraviolet light source design, in particular to a preparation method of an ultraviolet light source based on up-conversion phosphor light conversion. Background technique [0002] Ultraviolet light technology has been practically applied in technical fields such as sterilization and disinfection. At present, the common light sources in the field of ultraviolet light application are mainly gas discharge lamps. This type of traditional light source has some disadvantages, for example, the light source is large in size, the lamp is overheated during use, and its service life is relatively short. These disadvantages limit the application of ultraviolet light technology for some special needs. The ultraviolet light-emitting diode products that have appeared in recent years have improved the shortcomings of traditional gas discharge light sources to some extent, and have shown huge market development potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/78C09K11/80
CPCC09K11/02C09K11/778C09K11/7774
Inventor 刘峰陈凤赵习宇郭彤李辰琳
Owner NORTHEAST NORMAL UNIVERSITY
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