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A core-shell structure vanadium dioxide/zinc sulfide composite powder and its preparation method

A technology of vanadium dioxide and core-shell structure, applied in the direction of vanadium oxide, etc., can solve problems such as deep color tone, difficult multi-spectrum camouflage, and incompatibility of visible light bands, and achieve improved stability, broad application prospects, and excellent camouflage protection performance and thermal stability effects

Active Publication Date: 2017-03-15
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color of vanadium dioxide powder is blue-black, with a darker tone. There is a problem of incompatibility with visible light bands in camouflage applications, and it is difficult to apply multi-spectral camouflage.

Method used

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  • A core-shell structure vanadium dioxide/zinc sulfide composite powder and its preparation method
  • A core-shell structure vanadium dioxide/zinc sulfide composite powder and its preparation method
  • A core-shell structure vanadium dioxide/zinc sulfide composite powder and its preparation method

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Embodiment 1

[0038] A core-shell structure vanadium dioxide / zinc sulfide composite powder, the core of which is monoclinic phase vanadium dioxide powder, the outer shell is zinc sulfide, and the mass ratio of vanadium dioxide powder to zinc sulfide is 0.79:1; the The preparation method of core-shell structure vanadium dioxide / zinc sulfide composite powder comprises the following steps:

[0039] (1) Add 1.82 g of vanadium pentoxide and 2.52 g of oxalic acid dihydrate into 70 ml of deionized water, and stir magnetically for 30 min; transfer the resulting solution into a 100 ml hydrothermal kettle, and react at 285°C for 32 h. After the completion, the product was taken out after the hydrothermal kettle was naturally cooled, and the obtained suspension was centrifuged, washed, and vacuum-dried to obtain monoclinic VO 2 Powder;

[0040] (2) Prepare a zinc acetate / acetic acid / sodium acetate mixed buffer solution with pH=5, wherein the concentration of zinc acetate is 0.2mol / L, the concentratio...

Embodiment 2

[0048] A core-shell structure vanadium dioxide / zinc sulfide composite powder, the core of which is vanadium dioxide powder, the outer shell is zinc sulfide, the mass ratio of vanadium dioxide powder and zinc sulfide is 0.79:1; the core-shell structure The preparation method of vanadium dioxide / zinc sulfide composite powder comprises the following steps:

[0049] (1) Add 1.82 g of vanadium pentoxide and 3.15 g of citric acid into 70 ml of deionized water, and stir magnetically for 30 min; transfer the resulting solution into a 100 ml hydrothermal kettle, and react at 285°C for 16 h; the reaction is complete Finally, after the hydrothermal kettle is naturally cooled, the product is taken out, and the resulting suspension is centrifuged, washed, and vacuum-dried to obtain monoclinic VO 2 Powder;

[0050] (2) Prepare a zinc acetate / acetic acid / sodium acetate mixed buffer solution with pH=5, wherein the concentration of zinc acetate is 0.1mol / L, the concentration of acetic acid is...

Embodiment 3

[0056] A core-shell structure vanadium dioxide / zinc sulfide composite powder, the core of which is vanadium dioxide powder, the outer shell is zinc sulfide, the mass ratio of vanadium dioxide powder and zinc sulfide is 0.79:1; the core-shell structure The preparation method of vanadium dioxide / zinc sulfide composite powder comprises the following steps:

[0057] (1) Add 1.82 g of vanadium pentoxide and 2.52 g of oxalic acid dihydrate into 70 ml of deionized water, and stir magnetically for 30 min; transfer the resulting solution into a 100 ml hydrothermal kettle, and react at 285°C for 16 h; After the completion, the product was taken out after the hydrothermal kettle was naturally cooled, and the obtained suspension was centrifuged, washed, and vacuum-dried to obtain monoclinic VO 2 Powder;

[0058] (2) Prepare a zinc acetate / acetic acid / sodium acetate mixed buffer solution with pH=5, wherein the concentration of zinc acetate is 0.3mol / L, the concentration of acetic acid is ...

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Abstract

The invention discloses vanadium dioxide / zinc sulfide composite powder with a core-shell structure and a preparation method of the composite powder. A core of the composite powder is of vanadium dioxide powder, and a shell of the composite powder is of zinc sulfide. The preparation method of the vanadium dioxide / zinc sulfide composite powder with the core-shell structure comprises the steps of (1) synthesizing monoclinic phase vanadium dioxide powder through one step hydro thermal method; (2) preparing a mixed buffer solution of zinc acetate / acetic acid / sodium acetate; (3) adding a surfactant and the vanadium dioxide powder into the buffer solution, then stirring, adding mercaptoethylamine, heating, and cooling, so as to obtain a product, namely turbid liquid; (4) performing centrifugation, washing and vacuum drying on the product. The obtained vanadium dioxide / zinc sulfide powder can maintain infrared adaptive feature, compatible adaptive camouflage of visible light / infrared is realized, more excellent camouflage protective property and heat stability are achieved, which enable the vanadium dioxide / zinc sulfide composite powder with the core-shell structure has wide application prospect in the field of camouflage and protection.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and relates to a core-shell structure composite powder and a preparation method thereof, in particular to a core-shell structure vanadium dioxide / zinc sulfide composite powder and a preparation method thereof. Background technique [0002] With the development of reconnaissance and detection technology, the camouflage protection of military targets is particularly important. Camouflaging military targets is an effective way to reduce their detection probability and improve their survivability. In modern combat operations, the region changes frequently, and the environment in different regions varies greatly. It is hoped that the camouflage protective equipment has the ability to adapt to the environment and can dynamically integrate with the background as the region and time change. However, traditional camouflage protection technologies are static. When the environment changes, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
CPCC01G31/02C01P2002/70C01P2002/88C01P2004/03C01P2006/60
Inventor 刘东青嵇海宁程海峰张朝阳郑文伟
Owner NAT UNIV OF DEFENSE TECH
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