Electrostriction of Near-Critical SF6 in Microgravity

Published: June 01, 1999


G A. Zimmerli, R A. Wilkinson, R A. Ferrell, Michael R. Moldover


We used interferometry to measure the electric-field-induced (I.e., electrostrictive) increase of the density of sulfur hexafluoride near its critical point. The results at the temperatures Tc + 5 mK, Tc + 10 mK, and Tc + 30 mK, with Tc = 319 K, agree with a calculation based on the Clausius-Mossotti relation and the restricted cubic model equation of state. These measurements were performed in microgravity so that the electrostrictive density changes (< 3.5 % in this work) would not be complicated by stratification of the fluid s density induced by the Earth s gravity.
Citation: Physical Review Letters
Volume: 82
Issue:  No. 26
Pub Type: Journals


critical phenomena, critical point, electrostriction, equation of state, sulfur hexafluoride
Created June 01, 1999, Updated February 17, 2017