Summary
Measurements of dielectric-constant variations have been performed at 10 GHz by working with samples of CHF3 at various densities, sweeping the temperature near the critical point. The analysis of the experimental results points out an anomaly in the dielectric constant along the coexistence curve near the critical temperature Tc. A nonequilibrium effect, which can be used to check the critical density of the sample, is observed at Tc.
Riassunto
Sono state misurate, alla frequenza di 10 GHz, le variazioni della costante dielettrica di campioni di CHF3 a diverse densità e in funzione della temperatura, vicino al punto critico. L’analisi dei risultati sperimentali evidenzia un’anomalia della costante dielettrica lungo la curva di coesistenza vicino alla temperatura critica TC. Si osserva a TC un effetto di non equilibrio che può essere utilizzato per controllare se la densità del campione è quella critica.
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Bertolini, D., Cassettari, M. & Salvetti, G. Behaviour of the dielectric constant of CHF3 near the critical point. Nuov Cim B 48, 109–119 (1978). https://doi.org/10.1007/BF02748653
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DOI: https://doi.org/10.1007/BF02748653