Electrical properties of iron powder-based composites encapsulated by the oxide coating
https://doi.org/10.29235/1561-8323-2020-64-2-233-237
Abstract
The electrical characteristics of composite materials based on iron powders ASC 100.29 (Sweden) were investigated. The surface of powders is encapsulated by an insulating ferrite coating. The conductivity and the thermopower were studied, the cores were made by the pressing method, and then the samples were cut from the cores. The results show that the decrease in the electrical resistance with increasing temperature is due to a change in the contact between the grains in the sample. A change in the boundaries between grains (or domains) creates the conditions for formation of a new magnon, which affects the thermopower coefficient value. The research results can be used in the synthesis of composites with specified electromagnetic characteristics for practical applications.
Keywords
Supporting agencies: This work was financially supported by the Belarusian Republican Foundation for Fundamental Research as part of the joint project BRFFR–Uzbekistan (Т19УЗБГ-011).
About the Authors
A. K. Vetcher
Scientific and Practical Material Research Center of the National Academy of Sciences of Belarus,
Belarus
Belarus
Vetcher Alexander K. – Senior researcher.
19, P. Brovka Str., 220072, Minsk
A. I. Galyas
Scientific and Practical Material Research Center of the National Academy of Sciences of Belarus
Belarus
Belarus
Galyas Anatoly I. – Ph. D. (Physics and Mathematics), Senior researcher.
19, P. Brovka Str., 220072, Minsk
G. A. Govor
Scientific and Practical Material Research Center of the National Academy of Sciences of Belarus
Belarus
Belarus
Govor Gennady A. – D. Sc. (Physics and Mathematics), Professor, Сhief researcher.
19, P. Brovka Str., 220072, Minsk
K. I. Yanushkevich
Scientific and Practical Material Research Center of the National Academy of Sciences of Belarus
Belarus
Belarus
Yanushkevich Kazimir I. – D. Sc. (Physics and Mathematics), Head of the Laboratory.
19, P. Brovka Str., 220072, Minsk
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