Measurements of Thermal Conductivity of 1-Butyl-3-methylimidazolium Tetrafluoroborate at High Pressure

Abstract

Ionic liquids are salts that are liquid at room temperature. They draw much attention as new materials. In this study, a transient short-hot-wire apparatus was made and the thermal conductivity of 1-butyl-3 methylimidazolium tetrafluoroborate ([bmim][BF₄]) was measured. The experimental temperatures were from 294 to 334 K and pressures were from 0.1 to 20 MPa. It was found that the thermal conductivity of ionic liquid has very small temperature and pressure dependence.