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Microthermocouples of a Glass-Insulated Bifilar Microwire Based on Bi2Te3

Published online by Cambridge University Press:  01 February 2011

Dragosh F Meglei ,
Tito E Huber ,
Maria P Dyntu  and
Albina Alexandr Nikolaeva
Dragosh F Meglei
Affiliation:
[email protected], IIETI, ASM, Chisinau, Moldova
Tito E Huber
Affiliation:
[email protected], Howard University, Department of Chemistry, Washington, Washington, United States
Maria P Dyntu
Affiliation:
[email protected], IIETI, ASM, Chisinau, Moldova
Albina Alexandr Nikolaeva
Affiliation:
[email protected], Institute of Electronic Engineering and Industrial Technologies, Academy of Sciences of Moldova, 3/3 Academiei str., Chisinau, Md-2028, Moldova, +373 22 738116, +373 22 738116
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Abstract

The paper presents the results of studies related to the technology for obtaining glass-insulated bifilar microwires (BMWs) of a thermoelectric material based on Bi2Te3 with one wire exhibiting the n-type and the other p-type conduction as well as the study of their mechanical properties by the strain method and the microscopic analysis of the morphology of structural defects with a view to preparing microthermocouples on their basis.

Preliminary studies showed that BMWs are more flexible than single microwires of the same material. The rupture strength of BMWs per unit cross section of a sample (together with the glass) ranges within 18-6 kg/mm2 with respect to diameters of 90-120 μm.

Microthermocouples with a signal value on the order of 2-12 mV in a temperature range of 23-50°C have been developed. The preparation of thermoelectric microthermocouples of BMWs significantly reduces the number of process operations in the course of their production and considerably increases their resistance to impacts and vibrations. Microthermocouples based on glass-insulated BMWs have smaller sizes and weight; they can be used for measuring temperatures in chemically aggressive media.

Keywords

thermoelectricityalloyelastic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1267: Symposium DD – Thermoelectric Materials 2010-Growth, Properties, Novel Characterization Methods and Applications , 2010 , 1267-DD10-16
Copyright
Copyright © Materials Research Society 2010

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References

1 Ulitovsky, A.V. and Averin, N.M., USSR Inventor's certificate no. 161325, MKI G 03 C 29/00.Google Scholar
2 Kantser, V., Meglei, D., and Dyntu, M., Moldavian Journal of the Physical Sciences 2, 177 (2003).Google Scholar