High-temperature, high-pressure thermophysical measurements on liquid zinc

Wire-shaped zinc samples were resistively volume heated as part of a fast-capacitor discharge circuit. Time-resolved measurements with submicrosecond resolution of the current through the specimen, the voltage drop across it, and the thermal expansion of the specimen as a function of time allow dete...

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Bibliographic Details
Published in:International journal of thermophysics 1996-09, Vol.17 (5), p.987-1000
Main Authors: OTTER, C, POTTLACHER, G, JÄGER, H
Format: Article
Language:English
Subjects:
Applied sciences
Cameras
Capacitors
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Density (specific gravity)
Electric conductivity
Electrical and thermal conduction in amorphous and liquid metals and alloys
Electronic conduction in metals and alloys
Electronic transport in condensed matter
Enthalpy
Exact sciences and technology
Heat capacities of solids
Heating
High temperature effects
Liquid metals
Metals. Metallurgy
Physics
Pressure effects
Thermal expansion
Thermal expansion
thermomechanical effects and density
Thermal properties of condensed matter
Thermal properties of crystalline solids
Zinc
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Summary:Wire-shaped zinc samples were resistively volume heated as part of a fast-capacitor discharge circuit. Time-resolved measurements with submicrosecond resolution of the current through the specimen, the voltage drop across it, and the thermal expansion of the specimen as a function of time allow determination of the enthalpy, electrical resistivity, and density at different temperatures up to superheated liquid states of zinc far above the normal boiling point. High static pressures, up to 3800 bar of the ambient medium water, were used. An estimate of the critical pressure for zinc is given by investigations of the stability of the sample with a framing CCD camera, taking pictures of different samples varying the ambient static pressure. The critical volume and the critical temperature are obtained by means of an extrapolation of measured data at different pressures.
ISSN:0195-928X
1572-9567
DOI:10.1007/bf01441988