Among high-performance ceramic materials, silicon carbide ceramics (SiC) and aluminum nitride ceramics (AlN) have attracted much attention due to their unique physical properties, especially in terms of thermal
Heat is energy that transfers between two materials due to temperature differences. Heat flows from the object of higher temperature to the object of lower temperature until thermal equilibrium is achieved. Methods of heat transfer include thermal conduction, convection and radiation. Thermal conducti...
Therefore, eqns [1] and [2] give the upper limit for the thermal conductivity with respect to fissile particle distribution. For randomly distributed particles, the thermal conductivity can be significantly lower, depending on the difference in thermal conductivity of the two materials (i.e., ...
Materials with ultrahigh or low thermal conductivity are desirable for many technological applications, such as thermal management of electronic and photonic devices, heat exchangers, energy converters and thermal insulation. Recent advances in simulation tools (first principles, the atomistic Green’s funct...
Phonon is the main contributor to the interface thermal resistance (or interface thermal conductivity, which is the reciprocal of the interface thermal resistance) in the nonmetal/nonmetal, metal/nonmetal interface [2], and in the two materials mentioned earlier. Among the formed interfaces, we main...
Applications of Thermal Conductivity The concept of thermal conductivity is essential indesigningand optimizing thermal insulation materials to reduce heat loss or gain. It is also pivotal in developing efficient heat exchangers, such as those used in HVAC systems, refrigeration units, and power plants...
The thermal conductivities of materials are extremely important for many practical applications, such as in understanding the thermal balance and history of the Earth, energy conversion of devices and thermal management of electronics. However, measurements of the thermal conductivity of materials under pr...
Thermal resistance (R) and thermal conductance (C) of the materials can be derived from thermal conductivity (k) and the thickness of the materials.
Thermal conductivity refers to the ability to conduct/transfer heat. It's denoted by k, λ, or κ. Measured in watts per meter kelvin (W/mK).
An optimal combination was selected with the highest thermal conductivity. Then, Al2O3, Fe2O3, Fe, and Cu nanoparticles with different mass fractions were doped into the organic PCMs, in order to prepare a variety of composite phase change heat storage materials. The results show that four ...