Determination of the Relative Permittivity, ϵ′, of Methylbenzene at Temperatures between (290 and 406) K and Pressures below 20 MPa with a Radio Frequency Re-Entrant Cavity and Evaluation of a MEMS Capacitor for the Measurement of ϵ′

摘要: The relative electric permittivity of liquid methylbenzene has been determined with an uncertainty 0.01 % from measurements the resonance frequency lowest order inductive-capacitance mode a re-entrant cavity (J. Chem. Thermodyn. 2005, 37, 684–691) at temperatures between (290 and 406) K pressures below 20 MPa T = 297 MicroElectricalMechanical System (MEMS) interdigitated comb capacitor. For cavity, working equations were combination expressions reported by Hamelin et al. (Rev. Sci. Instrum. 1998, 69, 255−260) function to account for dilation resonator vessel walls pressure that was calibration methane Eng. Data 2007, 52, 1660–1671). results represented empirical equation Owen Brinkley (Liq. Phys. Rev. 1943, 64, 32–36) analogous Tait (Br. J. Appl. 1967, 18, 965–977) standard (k 1) 0.33 %. values Mospik (J....