Miniaturized Heat-Flux Sensor Based on a Glass-Insulated Bi–Sn Microwire


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Thermoelectric-energy conversion based on a single element made of an anisotropic material is considered. In such materials, the heat flux generates a transverse electric field. We fabricate an experimental heat-flux sensor (HFS) sample consisting of a 10-m-long glass-insulated single-crystal tin-doped bismuth microwire (outer diameter D = 18 μm, microwire diameter d = 4 μm). The microwire is wound into a flat spiral after recrystallization in a strong electric field, during which the main crystallographic axis C3 is oriented at the optimum angle with respect to the microwire axis. The sensor sensitivity reaches 10–2 V/W with the time constant τ ≈ 0.2 s. The sensor fabrication technology is rather simple and reliable for industrial applications.

Sobre autores

L. Konopko

Ghitu Institute of Electronic Engineering and Nanotechnology

Autor responsável pela correspondência
Email: l.konopko@nano.asm.md
Moldova, Chisinau, MD-2028

A. Nikolaeva

Ghitu Institute of Electronic Engineering and Nanotechnology

Email: l.konopko@nano.asm.md
Moldova, Chisinau, MD-2028

T. Huber

Department of Chemistry, Howard University

Email: l.konopko@nano.asm.md
Estados Unidos da América, Washington, DC 20059

A. Kobylianskaya

Ghitu Institute of Electronic Engineering and Nanotechnology

Email: l.konopko@nano.asm.md
Moldova, Chisinau, MD-2028

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