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Blue light fluorescent powder for ultraviolet light excitation and preparation method thereof

A fluorescent powder and ultraviolet light technology, applied in the field of anti-counterfeiting, can solve the problems of poor controllability, affecting the peak emission and quantum efficiency of phosphor powder, weak afterglow performance, etc., and achieve the effect of enhancing performance and improving afterglow performance

Inactive Publication Date: 2022-01-28
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] Based on the poor controllability of the background technology, which affects the emission peak and quantum efficiency of the phosphor, resulting in weak afterglow performance, the present invention proposes a blue phosphor for ultraviolet light excitation and its preparation method

Method used

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  • Blue light fluorescent powder for ultraviolet light excitation and preparation method thereof
  • Blue light fluorescent powder for ultraviolet light excitation and preparation method thereof
  • Blue light fluorescent powder for ultraviolet light excitation and preparation method thereof

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Embodiment Construction

[0027] The present invention will be further explained below in conjunction with specific embodiments.

[0028] refer to Figure 1-5 , embodiment one

[0029] In this embodiment, a blue-light phosphor for ultraviolet light excitation is proposed, and the blue-light phosphor includes 60 parts of Ca 3 Ga 4 , 34 parts of maleic anhydride-vinyl acetate linear alternating copolymer, 34 parts of nitrate, 24 parts of melamine, 20 parts of glue, 10 parts of urotropine and an appropriate amount of ethoxy alcohol solution, glue For maleic anhydride modified rosin glyceride mixed glue, the preparation raw material of maleic anhydride-vinyl acetate linear alternating copolymer comprises reaction monomer maleic anhydride, vinyl acetate, butyl acetate and dibenzoyl peroxide, will After mixing the raw materials, put them into the reaction kettle, and react at a temperature of 75°C to 85°C for 4 hours to 6 hours. One or several kinds of epoxy resin adhesives are mixed. When preparing the ...

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Abstract

The invention belongs to the field of anti-counterfeiting, and particularly relates to blue light fluorescent powder for ultraviolet excitation and a preparation method thereof. In allusion to the problems of unstable emission peak value and quantum efficiency and weak afterglow performance in the prior art, the invention proposes the following scheme: the blue light fluorescent powder is prepared from the following components in parts by weight: 60 parts of Ca3Ga4, 30 to 34 parts of a maleic anhydride-vinyl acetate linear alternating copolymer, 30 to 34 parts of nitrate, 20 to 24 parts of melamine, 16 to 20 parts of glue, 6 to 10 parts of urotropin and a proper amount of an ethoxy alcohol solution, the glue is maleic anhydride modified rosin glyceride mixed glue, the performance of the fluorescent powder can be enhanced through the Ca3Ga4, the maleic anhydride-vinyl acetate linear alternating copolymer, the nitrate, the melamine, the glue, the urotropine and a proper amount of the ethoxy alcohol solution, the emission peak value and the quantum efficiency are properly matched, the requirements of the commercial anti-counterfeiting fluorescent powder are met, and the afterglow performance of the fluorescent powder is further improved.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting technology, in particular to a blue fluorescent powder for ultraviolet light excitation and a preparation method thereof. Background technique [0002] Blue light phosphor is a kind of phosphor that can emit blue light under the irradiation of ultraviolet light. It is often used in various anti-counterfeiting items. The patent application number CN201911125958.2 discloses a multi-emission multi-process long-term method suitable for security anti-counterfeiting. The afterglow fluorescent powder and its preparation method, the preparation process of the present invention is simple, can be mass-produced, and the product performance is excellent, the fluorescent powder can be effectively excited by ultraviolet light, different wavelengths of ultraviolet light can excite visible light of different colors, and at the same time, different modes of ultraviolet Photoexcitation also enables differentiated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62
CPCC09K11/625
Inventor 邱建备李锡正
Owner KUNMING UNIV OF SCI & TECH
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