AN ISOTHERMAL SCANNING CALORIMETER CONTROLLED BY LINEAR PRESSURE VARIATIONS FROM 0.1-MPA TO 400-MPA - CALIBRATION AND COMPARISON WITH THE PIEZOTHERMAL TECHNIQUE
Sl. Randzio et al., AN ISOTHERMAL SCANNING CALORIMETER CONTROLLED BY LINEAR PRESSURE VARIATIONS FROM 0.1-MPA TO 400-MPA - CALIBRATION AND COMPARISON WITH THE PIEZOTHERMAL TECHNIQUE, Review of scientific instruments, 65(4), 1994, pp. 960-965
An isothermal scanning calorimeter controlled by linear pressure varia
tions is described for the pressure range 0.1-400 MPa at temperatures
from 303 to 573 K. The rate of pressure variations can be as low as 0.
002 MPa/s over the whole pressure range. The functioning of the instru
ment was tested by measuring the coefficient of thermal expansivity of
liquid n-hexane, with calibration performed with gaseous nitrogen and
by measuring the coefficient of thermal expansivity of benzene with c
alibration performed with liquid n-hexane. The results are compared wi
th literature results obtained by the piezothermal technique and with
results obtained in the present instrument by the use of a pressure st
epwise scanning mode. An example of an investigation of an isothermal
solid-to-liquid transition in benzene is also given.