Simultaneous absolute measurements of the thermal diffusivity and the thermal effusivity in solids and liquids using photopyroelectric calorimetry

U Zammit, F Mercuri, S Paoloni, M Marinelli… - Journal of Applied …, 2015‏ - pubs.aip.org
We report on the simultaneous “absolute” measurements of the thermal diffusivity and of the
thermal effusivity in solid and liquid samples by using only the phase of the so called self …

Quadrupole modelling of dual lock-in method for the simultaneous measurements of thermal diffusivity and thermal effusivity

M Ryu, JC Batsale, J Morikawa - International Journal of Heat and Mass …, 2020‏ - Elsevier
The simultaneous measurement of thermal diffusivity and thermal effusivity based on the
temperature wave analysis (TWA) is proposed by introducing the dual lock-in temperature …

Assessment of calibration procedures for accurate determination of thermal parameters of liquids and their temperature dependence using the photopyroelectric …

S Delenclos, M Chirtoc, AH Sahraoui… - Review of Scientific …, 2002‏ - pubs.aip.org
We present a systematic theoretical and experimental investigation on the accuracy of
thermal diffusivity α and thermal effusivity e of liquids measured by the photopyroelectric …

Random-field effects on the nematic–smectic-A phase transition due to silica aerosil particles

B Zhou, GS Iannacchione, CW Garland, T Bellini - Physical Review E, 1997‏ - APS
A high-resolution calorimetric study has been made on the smectic-A to nematic phase
transition in liquid crystals perturbed by the dispersion of 70-Å-diam silica spheres …

Anisotropic heat transport in the octylcyanobiphenyl (8CB) liquid crystal

M Marinelli, F Mercuri, S Foglietta, U Zammit, F Scudieri - Physical Review E, 1996‏ - APS
The critical behavior of the specific heat, thermal conductivity, and thermal diffusivity at the
smectic-A–nematic phase transition of aligned octylcyanobiphenyl (8CB) has been studied …

Analysis of the Order Character of the RII−RI and the RI−RV Rotator Phase Transitions in Alkanes by Photopyroelectric Calorimetry

U Zammit, M Marinelli, F Mercuri… - The Journal of Physical …, 2010‏ - ACS Publications
The character of the RII− RI and the RI− RV transitions was studied in alkane samples by
analyzing the hysteresis the specific heat shows between heating and cooling …

Critical behavior of thermal parameters at the smectic-–hexatic- and smectic-–smectic- phase transitions in liquid crystals

F Mercuri, M Marinelli, U Zammit, CC Huang… - Physical Review E, 2003‏ - APS
High temperature resolution measurements of thermal conductivity, thermal diffusivity, and
specific heat, with simultaneous polarized light visual inspection of the sample, have been …

Effect of Quenched Disorder on the RI−RV, RII−RI, and Liquid−RII Rotator Phase Transitions in Alkanes

U Zammit, M Marinelli, F Mercuri… - The Journal of …, 2011‏ - ACS Publications
The ability of disorder to reduce the coupling between the distortion and tilt angle order
parameters was tested over the RI− RV phase transition by measuring the specific heat in …

Latent heat investigation by photopyroelectric calorimetry

F Mercuri, M Marinelli, S Paoloni, U Zammit… - Applied Physics …, 2008‏ - pubs.aip.org
We report on an approach for photopyroelectric calorimetry enabling a frequency
dependence detection of the specific heat and of the latent heat exchanged over first order …

Effect of the nematic range on the critical behavior and anisotropy of the heat transport parameters at the smectic-–nematic phase transition

F Mercuri, U Zammit, M Marinelli - Physical Review E, 1998‏ - APS
The photopyroelectric technique has been used to study the specific heat, the thermal
conductivity, and the thermal diffusivity at the smectic-A–nematic phase transition of …