Utilizing the thermoelectric effect to its maximum potential requires a minimization of the thermal conductivity due to phonons without reducing the electrical conductivity. Creating a material with highly localized phonon modes is one way of accomplishing this. Randomly distributing heavy hafnium oxide ...
wherenpdis the carrier density due to electron–hole puddles in graphene,Coxis the gate capacitance,T0is the ambient temperature, andVD,vFare the charge neutrality voltage and the Fermi velocity of graphene, respectively. The conductivity of graphene is given byσ = (nh + ne)eμ(Te...
Conventional ways of improving the heat transfer rate through a proper variation of the velocity field without consuming energy have gained much attention. Thermal conductivity plays an important and vital role among all other properties in judging the heat transfer abilities of the fluid. Ultimately,...
Above, we showed that the effects of room temperature TBC values on overall device thermal resistance are only appreciable for a-GST when the thickness is less than 10 nm. However, as the a-GST film changes phase, its intrinsic thermal conductivity increases by almost an order of magnitude...
Numerous studies have demonstrated significant interest in increasing the material and thermal conductivity of nanofluids using either theoretical or experimental methods in recent times, which has sparked a lot of activity in the area of nanofluids (Mahian et al., 2014, 2013). Studies available in ...
Temperature gradients were markedly more significant in the case of a support with identical geometry but made of steel, due to a tenfold reduction of the intrinsic material conductivity. They were still greater in the case of a steel support with thinner plates. For aluminum supports, ...
Before testing, overspray was ground away from the edge of the sample and the button mounted to a carrier plate using a single spot weld. Due to constraints with testing time, only the sample on HVAF bond coat was tested in thermal shock. 2.5. Thermal conductivity analysis Thermal ...
by weight of a rare earth element in terms of the amount of an oxide thereof; and at most 0.3% by weight of Li, Na, K, Fe, Ca, Mg, Sr, Ba, Mn and B as impurity cationic elements in terms of a total amount thereof, and having a thermal conductivity of at least 80 W/m K....
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These findings establish a clear path for exploring the unique photonic thermal conductivity and thermal energy density resulting from ENZ effects and hyperboloidal isofrequency surfaces at high temperature. Methods Metamaterial fabrication All refractory metamaterial samples were fabricated by magnetron ...