Published in International Journal of Thermophysics
Thermodynamic functions of two diatomic molecules gas, H2 and LiH, from theoretical point of view were predicted. The Schrödinger equation was analytically solved with the generalized Morse potential using Nikiforov–Uvarov method. The energy eigenvalues were obtained for the two cases (i) constant effective mass and (ii) position-dependent effectiv...
Published in International Journal of Thermophysics
Ancient documents are of historical interest because they contain valuable information for future generations. One of the most common causes of documents damage and degradation is due to the presence of fungi. Therefore, it is very important to protect them from these microorganisms. In this work, TiO2 nanoparticles (TiO2NPs) were synthesized and u...
Published in International Journal of Thermophysics
Densities of pure 1-heptanol, 1-decanol, n-heptane, n-octane, n-nonane, n-decane, and their binary liquid mixtures were measured over the entire range of composition at (288.15, 293.15, 298.15, 303.15, 308.15, 313.15) K and at atmospheric pressure (0.1 MPa). The experimental data were used to determine several thermophysical properties including, t...
Published in International Journal of Thermophysics
Effective thermal conductivity of a porous medium is a key thermos-physical parameter in characterizing heat transfer properties in many applications. In this study, a new cell model to predict the porous medium effective thermal conductivity is developed by treating the cells as being variables in size in relation to porosity. In the new model, th...
Published in International Journal of Thermophysics
The NASICON system LAGP (Li1+xAlxGe2−x (PO4)3 was studied, which is a candidate material for solid state electrolytes. LAGP substrates with different compositions (x = 0.3–0.7) were prepared using a melt quenching route with subsequent heat treatment. In order to develop a better understanding of the relationships between the structure and the ioni...
Published in International Journal of Thermophysics
Zinc ammonium phosphate (ZnNH4PO4) was synthesized via a simple precipitation method at room temperature. Thermal decomposition of ZnNH4PO4 occurred through five stages related to the deamination (1st and 2nd steps) and deprotonated hydrogen phosphate (3rd, 4th, 5th steps) reactions and its final decomposed product at above 600 °C was zinc pyrophos...
Published in International Journal of Thermophysics
Large-sized laser components with diameters over 100 mm are widely used in high-power/high-energy laser systems. In these laser systems, one of the key factors leading to laser damage is the strongly absorptive defects (usually with microscale sizes) on the surface/sub-surface of laser components. In previous studies, these absorptive defects were ...
Published in International Journal of Thermophysics
We report on the application of the Photoacoustic Spectroscopy and the phase-resolved technique to analyze the presence and contribution of the photosensitive pigments to the photoacoustic signal of the peel in Golden Delicious Apple (Malus domestica), as well as the changes in the photoacoustic signal with maturation time. Unlike optical absorptio...
Published in International Journal of Thermophysics
By the measurement of the frequency and damping time of surface oscillations, excited by a short pulse on a freely floating liquid droplet, the surface tension and viscosity of the liquid can under certain conditions contactlessly be determined. The conventional physical models linking these material properties to the corresponding measurement quan...
Published in International Journal of Thermophysics
The present work shows the accurate calorimetric measurements of phase equilibria of hydrocarbon mixtures for the low concentration of heavy hydrocarbon components in particular the system methane + propane + decane with special emphasis on the concentration of decane below one mole percentage. Heat capacity, internal energy, pressure, and temperat...
