标题： 液体介质中凝固和静压力丧失用于压力测量 显示英文标题

标题： Solidification and loss of hydrostaticity in liquid media used for pressure measurements

摘要： 我们对九种在常温下为液态的压力传递介质的凝固温度压力依赖性进行了研究，在高达2.3 GPa的压力下进行。 这些流体包括：1:1 异戊烷/正戊烷，4:6 轻质矿物油/正戊烷，1:1 异戊醇/正戊烷，4:1 甲醇/乙醇，1:1 FC72/FC84（Fluorinert），Daphne 7373，异戊烷，以及Dow Corning PMX硅油200和60,000 cst。 我们依靠Ba(Fe1-xRux)2As2单晶的电阻率对压力介质冻结的敏感性，并通过作为常温电阻式压力计的锰铜线圈的电阻相应异常进行交叉验证。 除了确定区分液态（静水压）和固态（非静水压）相的温度-压力线外，这些数据还允许对这些介质在常温下的冻结压力进行粗略估计。 这个压力确定了介质被视为静水压的极限。 对于更高的施加压力，介质必须被当作非静水压处理。 显示英文摘要

摘要： We carried out a study of the pressure dependence of the solidification temperature in nine pressure transmitting media that are liquid at ambient temperature, under pressures up to 2.3 GPa. These fluids are: 1:1 isopentane/n-pentane, 4:6 light mineral oil/n-pentane, 1:1 isoamyl alcohol/n-pentane, 4:1 methanol/ethanol, 1:1 FC72/FC84 (Fluorinert), Daphne 7373, isopentane, and Dow Corning PMX silicone oils 200 and 60,000 cst. We relied on the sensitivity of the electrical resistivity of Ba(Fe1-xRux)2As2 single crystals to the freezing of the pressure media, and cross-checked with corresponding anomalies observed in the resistance of the manganin coil that served as the ambient temperature resistive manometer. In addition to establishing the Temperature-Pressure line separating the liquid (hydrostatic) and frozen (non-hydrostatic) phases, these data permit rough estimates of the freezing pressure of these media at ambient temperature. This pressure establishes the extreme limit for the medium to be considered hydrostatic. For higher applied pressures the medium has to be treated as non-hydrostatic.