Passive cooling is a method of dissipating heat rejected by electronic devices, and when associated to a phase change can be very effective. Phase change materials (PCMs) are widely used for thermal storage applications due to their ability to store and release large amounts of energy. Paraffin waxes also exhibit desirable characteristics, such as high latent heat and low thermal conductivity. This article looks at four nano-PCMs, obtained by seeding ...
Author(s): Davide Ercole, Laura Colla, Laura Fedele, Oronzio Manca, Sergio Bobbo, Simone Mancin
Research has been focused on the Co-based thermoelectric family since the discovery of thermoelectric properties in NaCo₂O₄ ceramics. The formation of strong grain boundaries has been achieved in several ceramic materials through the addition of metallic Ag, forming the liquid phase. In the case of Ca₃Co₄O₉ ceramic materials, it is essential to find a comparable additive. In this study, K₂CO₃ is analyzed as liquid phase promoter ...
Author(s): A. Kovalevsky, A. Sotelo, B S. Rasekh, F. M. Costa, J. C. Diez, J. S. Amaral, M. A. Madre, M. A. Torres, M. C. Ferro, N. M. Ferreira, V. S. Amaral
Recently, 2-D graphene nanoparticles produced by graphite exfoliation are a promising nanofiller for enhancing the thermal conductivity of polymeric materials. Unlike one-dimensional structures of carbon nanotubes, the 2-D structure provides reinforcement of polymer nanocomposites in two directions. In this article, multiwall carbon nanotubes (MWCNTs) and 2-D exfoliated graphite (EG), in a tetrafunctional epoxy resin, are investigated to determine the effect on thermal conductivity. Thermal conductivity measurements were carried out using ...
Author(s): Carlo Naddeo, Khalid Lafdi, LiberataB Guadagno, Luigi Vertuccio, Vittorio Romano
The phase behavior of polymeric materials is understood through glass transition temperature. It is a temperature boundary above which the polymeric material is soft and viscous, and becomes hard, brittle, and glassy below this temperature. In the present work, PS/PMMA immiscible polymer blend samples are studied at different compositional ranges. Thermal transport properties of PS/PMMA polymeric blends were measured , from room temperature to 120°C. Variation in thermal conductivity ...
Author(s): K. B. Sharma, Vishal Mathur
Glass-fiber reinforced polymer-matrix composites are widely used in electro and automotive industry due to their easy processing, low cost, and possibility to tailor properties. Functional properties of the composites strongly depend on their weight fractions and individual properties of constituents. In this study, E-glass fiber (EGF) weight and microstructure are analyzed to see the effect on thermal properties of the composites. Thermal transport properties of the composites were measured at ...
Author(s): Barabara Malic, Barbara Bertoncelj, Katarina Vojisavljevic, Marko Vrabelj
