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An ag/vo with laser protection properties 2 Preparation method of composite film

A composite thin film and laser protection technology, which is applied in the direction of superimposed layer plating, liquid chemical plating, vacuum evaporation plating, etc., can solve the problem of weakening the surface plasmon resonance effect of silver nanostructure, the thickness and shape of silver nanostructure layer It is difficult to choose, it is difficult to improve the laser damage threshold of the film, etc., to reduce the laser transmittance, shorten the phase change response time, and improve the laser protection performance.

Active Publication Date: 2019-07-23
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the surface plasmon resonance effect to enhance Ag / VO for laser protection 2 Composite thin films have not been reported, and the bottleneck of related technologies lies in the difficulty in choosing the thickness and morphology of the silver nanostructure layer.
Specifically, on the one hand, although the silver nanostructure layer is too thick, it can greatly reduce the VO 2 The laser transmittance of the film can increase the laser damage threshold of the film, but it will seriously weaken the surface plasmon resonance effect of the silver nanostructure and reduce the VO 2 The actual acceptable optical signal strength of the film
On the other hand, if the silver nanostructure layer is too thin, although the surface plasmon resonance effect of the silver nanostructure itself can be improved, the VO 2 The optical signal intensity that the thin film can receive, but cannot reduce VO 2 The laser transmittance of the film, and it is difficult to increase the laser damage threshold of the film
In the same way, the above-mentioned technical difficulties also exist in the shape selection of the silver nanostructure layer.

Method used

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  • An ag/vo with laser protection properties <sub>2</sub> Preparation method of composite film
  • An ag/vo with laser protection properties <sub>2</sub> Preparation method of composite film
  • An ag/vo with laser protection properties <sub>2</sub> Preparation method of composite film

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Effect test

Embodiment 1

[0025] 1) Using a metal vanadium target as a sputtering source, a 100nm thick metal vanadium film was sputtered on a clean quartz substrate under argon gas, and the substrate temperature was kept at 200°C;

[0026] 2) Raise the temperature of the tube annealing furnace with one end open, keep it warm at 500°C, and feed nitrogen from the non-open end of the furnace tube, and keep the nitrogen flow at 2L / min;

[0027] 3) Put the prepared metal vanadium film into a quartz crucible, and then push the crucible into the above-mentioned tubular annealing furnace for annealing. The annealing time is 10 minutes, and then pull out the crucible for rapid air cooling. get the desired VO 2 film.

[0028] 4) with AgNO 3 is the silver source, ethylene glycol is the reducing agent, polyvinylpyrrolidone is the stabilizer and dispersant, and HCl is the nucleation control agent. The silver nanowires are obtained by chemical reduction reaction, and the product is centrifuged and dispersed into ...

Embodiment 2

[0033] 1) Using a metal vanadium target as a sputtering source, a 100nm thick metal vanadium film was sputtered on a clean quartz substrate under argon gas, and the substrate temperature was kept at 200°C;

[0034] 2) Raise the temperature of the tube annealing furnace with one end open, keep it warm at 500°C, and feed nitrogen from the non-open end of the furnace tube, and keep the nitrogen flow at 2L / min;

[0035] 3) Put the prepared metal vanadium film into a quartz crucible, and then push the crucible into the above-mentioned tubular annealing furnace for annealing. The annealing time is 10 minutes, and then pull out the crucible for rapid air cooling. get the desired VO 2 film.

[0036] 4) with AgNO 3 Silver source, ethylene glycol as reducing agent, polyvinylpyrrolidone as stabilizer and dispersant, use chemical reduction reaction to obtain silver nanoparticles, centrifuge the product and disperse it in ethanol to obtain a silver nanoparticle dispersion with a concentr...

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Abstract

The invention belongs to the technical field of functional films, and in particular, relates to a preparation method of an Ag / VO2 composite film with laser protection performance. A silver nanowire or silver nanoparticle structure layer with surface plasmon resonance characteristics is coated on the surface of a VO2 polycrystalline film. The method can effectively improve the laser response degree and the laser radiation resistance of the film, is simple and controllable in preparation process, needs no expensive equipment, meanwhile, has no special requirements on the size and the morphology of the VO2 film, and provides a high-efficiency, short-period and industrial-implementation new technology to a VO2 base laser protection film.

Description

technical field [0001] The invention belongs to the technical field of functional thin films, in particular to an Ag / VO film with laser protection performance 2 Preparation method of composite film. Background technique [0002] With the rapid development of laser interference and blinding weapons, it has become an important problem to be solved urgently to find a new type of material suitable for laser protection to protect military personnel and various photoelectric detection systems from attack. As a thermally induced phase change material, VO 2 Reversible transitions between metal-insulators can be achieved at different temperatures. With the occurrence of phase transition, the photoelectric properties of the material change suddenly, so as to achieve low transmittance under strong light irradiation and protect the detector from damage, and high transmittance under weak light irradiation without affecting the signal received by the detector. Compared with other laser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/34C23C14/18C23C14/58C23C18/44C23C28/00
CPCC23C14/185C23C14/34C23C14/5853C23C18/44C23C28/322C23C28/3455
Inventor 田野罗飞刘大博祁洪飞罗炳威
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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