Glass fiber/Bi2Te3 thermoelectric thin-film composite material and preparation method thereof

Abstract

The invention relates to the field of composite materials, in particular to a glass fiber/Bi2Te3 thermoelectric thin-film composite material and a preparation method thereof. The composite material can be applied to the aspects of a flexible energy device, a miniature sensor and the like. The composite material comprises a glass fiber substrate and a Bi2Te3 thermoelectric thin-film layer, wherein the Bi2Te3 thermoelectric thin-film layer is evenly deposited on the surface of the cellulose paper substrate to form a core-shell structure; the diameters of glass fibers are 5-10 microns; the thickness of the Bi2Te3 thermoelectric thin-film layer is 1-2 microns; and the film layer is compact in structure and good in combination with the surfaces of the glass fibers. The glass fiber/Bi2Te3 thermoelectric thin-film composite material is prepared by an unbalanced magnetron deposition technology; a Bi2Te3 deposited layer has a compact structure of nanoscale grains and is uniform and adjustable in thickness; and the thermoelectric properties are close to those of a commercial block material. Due to the scale effect of the thin-film material, the fiber/thermoelectric composite material demonstrates good bending resistance and can be applied to the fields of the flexible energy device, the miniature sensor and the like.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a glass fiber / Bi 2 Te 3 A thermoelectric thin film composite material and a preparation method thereof, the composite material can be used as a flexible energy device, a micro sensor and the like. Background technique [0002] In recent years, as the imbalance between energy supply and economic development has become prominent, the energy crisis and environmental pollution have become increasingly serious worldwide. "Energy saving and carbon reduction" and the search for clean energy technologies are issues of concern to all countries today. Thermoelectric material is an advanced functional semiconductor material that can convert heat and electricity into two different forms of energy without the assistance of other specific external forces or devices. It can make full use of waste heat in daily production and life to generate electricity. It is an important research content i...

AI Technical Summary

Problems solved by technology

However, thermoelectric materials are generally covalently bonded semiconductor materials, which have intrinsic brittleness, low melting point, and easy-to-change components. It is difficult to prepare thermoelectric materials with micron scale and good elastic deformation properties by ordinary physical and chemical methods.

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