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A noncontact measurement technique for the density and thermal expansion coefficient of solid and liquid materials
Review of Scientific Instruments
A noncontact measurement technique for the density and the thermal expansion coefficient of refractory materials in their molten as well as solid phases is presented. This technique is based on the video image processing of a levitated sample. Experiments were performed using the high-temperature electrostatic levitator ͑HTESL͒ at the Jet Propulsion Laboratory in which 2-3 mm diam samples can be levitated, melted, and radiatively cooled in vacuum. Due to the axisymmetric nature of the moltendoi:10.1063/1.1147584 fatcat:lnlnmjezhfhijbwchb3ftknbvi