A kind of vanadium dioxide multilayer film system and its preparation method and application

Abstract

The invention belongs to the field of physics and particularly relates to a vanadium dioxide multilayer membrane system and a preparation method and application thereof. The vanadium dioxide multilayer membrane system comprises a metal thin membrane layer, a gradient refraction index material thin membrane layer and a vanadium dioxide thin membrane layer which are arranged from bottom to top in sequence. A vanadium dioxide material with a gradient refraction index function is used for the vanadium dioxide multilayer membrane system, so that the membrane layer number required in the vanadium dioxide multilayer membrane system is greatly reduced.

Description

technical field [0001] The invention belongs to the field of physics, and in particular relates to a vanadium dioxide multilayer film system and a preparation method and application thereof. Background technique [0002] With the vigorous development of my country's aerospace industry, the number of spacecraft such as various deep space probes, artificial satellites, space laboratories, and space telescopes has increased year by year. Due to the complexity of the internal equipment of the spacecraft, the power consumption and heat flux of the instrument continue to increase, and at the same time, the changes in the space environment faced by the spacecraft are becoming more and more complex. In general, the external temperature of the spacecraft fluctuates in the range of 150°C to 150°C, and in special environments it can reach 100°C to 400°C. Therefore, the importance of research on heat flow control of spacecraft for the development of aerospace technology is self-evident...

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Problems solved by technology

However, in the multilayer film system of the existing vanadium dioxide multilayer film element, due to the large variety of vanadium oxides and their properties and growth conditions are close to each other, the vanadium dioxide film actually prepared by the researchers (that is, vanadium dioxide Multilayer film) is a thin film material mainly composed of vanadium dioxide and accompanied by a small amount of other impurity phases such as V 2 o 5 、VO 2 , V 2 o 3 , VO and other 13 different phases, and there are V n o 2n-1 (3≤n≤9) and V n o 2n+1 (3≤n≤6) intermediate phase, the phase lattice structure of vanadium in different valence states is different, and the lattice structure, electrical, optical and other physical properties of each phase are quite different, which greatly affects the final film material phase change properties

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