thermal conductivity


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thermal conductivity

n.
A measure of the ability of a material to allow the flow of heat from its warmer surface through the material to its colder surface, determined as the heat energy transferred per unit of time and per unit of surface area divided by the temperature gradient, which is the temperature difference divided by the distance between the two surfaces (the thickness of the material), expressed in watts per kelvin per meter.

thermal conductivity

n
(General Physics) a measure of the ability of a substance to conduct heat, determined by the rate of heat flow normally through an area in the substance divided by the area and by minus the component of the temperature gradient in the direction of flow: measured in watts per metre per kelvin. Symbol: λ or k Sometimes shortened to: conductivity
References in periodicals archive ?
3]), a low dielectric constant, a high porosity (>99%), and a low thermal conductivity (0.
Fujitsu Laboratories has now developed a process for manufacturing carbon nanotubes, a material known for its high thermal conductivity in a cylindrical structure, and in which the combination of process temperature and pressure is precisely controlled to grow dense, uniform arrays of perpendicularly oriented carbon nanotubes.
In general, thermal conductivity is usually used to characterize the thermal conductive properties of polymer composites.
The copper is used to improve thermal conductivity and this percentage is appropriate for compatible prepared composite material samples.
Panasonic's proprietary resin design technology has enabled the industry's first(1) commercial production of multi-layer circuit board material for RF power amplifiers by providing halogen-free, low transmission loss and high thermal conductivity features that, up to this point, have represented a major technical barrier.
Using results from simulations and X-ray scattering experiments, scientists at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and at the University of California, Berkeley, found the electrons in vanadium dioxide are able to conduct electricity without conducting heat at a rate of thermal conductivity which was "ten times smaller than what would be expected from the Wiedemann-Franz Law.
The thermal conductivity of thin films was found to be very sensitive to the amount of clay addition in the system, and showed a linear decrease with the increasing clay content in the system.
The main parameters affecting the transfer of energy through a soil are the thermal conductivity and the specific heat (Farouki, 1981).
2005) and Sekino and Yamauchi (2007) fabricated binder-less insulation mats from wood shavings and measured their thermal conductivity and thermal diffusivity.
This paper presents a concrete mix design for higher thermal conductivity adopting MA (magnetite aggregate) and SP (steel powder).
3] described that the thermal conductivity and viscosity of nanofluids increased with the nanoparticle volume concentration.