Application of double modulation for measurement of the thermal expansion coefficient of liquid metals

The first results of the thermal expansion coefficient measurement obtained for liquid conductors using a new modulation method are presented. The method is based on a superposition of two periodical influences on a liquid metal. The thermal expansion coefficient αP is determined by means of measuri...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 98; no. 3; p. 032010
Main Authors Blagonravov, L A, Karchevskiy, O O, Ivannikov, P V, Soboleva, A V
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.02.2008
Subjects
Conductors
Eutectic alloys
Eutectic composition
Liquid metals
Modulation
Physics
Thermal expansion
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Summary:The first results of the thermal expansion coefficient measurement obtained for liquid conductors using a new modulation method are presented. The method is based on a superposition of two periodical influences on a liquid metal. The thermal expansion coefficient αP is determined by means of measuring the amplitudes of oscillations of electric current power w∼ and pressure p∼. In the present work the K-Na alloy of the eutectic composition was used as a sample. Distinction of the experimental data obtained by authors from the literature data is 30 to 40%. Such a difference is in the range of error of determination of αP from the density data of K-Na alloy. The method allows direct determination of the thermal expansion coefficient of liquid conductors in absolute units.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/98/3/032010