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Fluorescent powder for displaying potential fingerprints and preparation method thereof

A phosphor and green phosphor technology, applied in the direction of chemical instruments and methods, applications, luminescent materials, etc., can solve the problems of complex production process and high cost of nano-phosphor powder, and achieve simple preparation process, stable physical and chemical properties, good thermal The effect of stability

Inactive Publication Date: 2021-08-24
SHENYANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of high cost and complex production process of the existing latent fingerprint display nano-phosphor, and provide a micron-sized Tb 3+ Ion-activated barium lutetate green fluorescent powder and preparation method thereof

Method used

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  • Fluorescent powder for displaying potential fingerprints and preparation method thereof
  • Fluorescent powder for displaying potential fingerprints and preparation method thereof

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Embodiment 1

[0027] Preparation of Ba 3 Lu 3.92 Tb 0.08 o 9 Phosphor powder, the specific steps are as follows:

[0028] with BaCO 3 、Lu 2 o 3 , Tb 4 o 7 As a raw material, according to the molar mass ratio of Ba:Lu:Tb is 3:3.92:0.08, weigh the raw material, place the above raw material in an agate mortar and grind it fully for 30 minutes, add volatile absolute ethanol solvent during the grinding process to improve Grind quality and promote particle refinement, which helps to fully react between raw materials during calcination. The fully ground and mixed raw materials were transferred to a corundum crucible, sintered at 1500°C for 6 hours in a carbothermal reduction atmosphere under normal pressure, and naturally cooled to room temperature to obtain a sintered product. The sintered product was crushed, ground and sieved in an agate mortar to obtain Ba 3 Lu 3.92 Tb 0.08 o 9 Phosphor.

[0029] The CIE chromatic coordinate diagram of the fluorescent powder prepared in this embo...

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Abstract

The invention discloses a preparation method of Tb<3+>-activated micron-sized barium lutecium acid green fluorescent powder for potential fingerprint development and the fluorescent powder prepared by the preparation method. The general chemical formula of the micron-sized fluorescent powder is Ba3Lu4(1-x)Tb4xO9, and the adopted preparation method is a high-temperature solid-phase method and comprises the steps: uniformly mixing raw materials according to a stoichiometric ratio, carrying out heat preservation sintering for 6 hours at the temperature of 1500 DEG C in a normal-pressure carbon thermal reduction atmosphere, and finally crushing, grinding and screening the sintered product to obtain the fluorescent powder material. The preparation process is simple, and toxic and harmful substances are not generated in the preparation process; the particle size of the fluorescent powder is micron-sized, the fluorescent powder can be excited by ultraviolet light, the emitted light is green, and the fluorescent powder has good thermal stability. The fluorescent powder has good application potential in the aspect of potential fingerprint development.

Description

technical field [0001] The present invention relates to a fluorescent powder for displaying latent fingerprints and a preparation method thereof, in particular to a micron-sized Tb 3+ The activated green fluorescent powder and its preparation method belong to the technical field of rare earth luminescent materials and its preparation. Background technique [0002] In recent years, the application advantages of phosphors in the field of latent fingerprint visualization have gradually emerged. Since latent fingerprints are usually difficult to identify by naked eyes, in previous experience, techniques such as powder method, iodine fumigation method, silver nitrate method, ninhydrin method and α-ethyl cyanoacrylate method have been used to assist in the observation of latent fingerprints . Although the traditional latent fingerprint display method is mature in technology, there are disadvantages such as limited working conditions, complicated process, low sensitivity, high eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78A61B5/1172
CPCC09K11/7786A61B5/1172
Inventor 王梓垚栾雪竹孙世能马国峰
Owner SHENYANG UNIV
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