Laesecke Arno, Meier Karsten, Hafer Richard F
Institut für Thermodynamik, Helmut-Schmidt-Universität/Universität der Bundeswehr Hamburg, Holstenhofweg 85, D-22043 Hamburg, Germany.
GlobalFoundries, 2070 Route 52, Hopewell Junction, NY 12533, U.S.A.
J Mol Liq. 2018 Feb;251:128-141. doi: 10.1016/j.molliq.2017.12.010. Epub 2017 Dec 13.
The viscosity of 1,1,1-trifluoroethane (R143a) was measured with a piezoelectrically actuated, torsionally vibrating quartz sensor. The measurements extended over a temperature range from 300 K to 440 K with pressures to 68 MPa and covered states from the dilute gas to the compressed liquid. The influence of the drive voltage on the torsional displacement of the vibrator in fluid and in vacuum was systematically investigated. Since R143a is highly polar, the sample conductance and susceptance were also monitored with the sensor to detect possible electroviscous contributions in the measured viscosities. None were identified so that the estimated uncertainty of the measurements remains at 2 % at a 95 % confidence level (coverage factor = 2). The results agree well within this margin with literature data that were determined with four other viscometric techniques.
使用压电驱动的扭转振动石英传感器测量了1,1,1 - 三氟乙烷（R143a）的粘度。测量温度范围为300 K至440 K，压力高达68 MPa，涵盖了从稀薄气体到压缩液体的状态。系统研究了驱动电压对振动器在流体和真空中扭转位移的影响。由于R143a具有高度极性，还使用该传感器监测了样品的电导和电纳，以检测测量粘度中可能的电粘性贡献。未发现此类贡献，因此在95%置信水平（覆盖因子 = 2）下，测量的估计不确定度保持在2%。在该误差范围内，结果与用其他四种粘度测量技术测定的文献数据吻合良好。
