thermal conductivity

(redirected from conductivity, thermal)
Also found in: Dictionary.

thermal conductivity

[′thər·məl ‚kan‚dək′tiv·əd·ē]
(thermodynamics)
The heat flow across a surface per unit area per unit time, divided by the negative of the rate of change of temperature with distance in a direction perpendicular to the surface. Also known as coefficient of conductivity; heat conductivity.

thermal conductivity

The rate of transfer of heat by conduction; the amount of heat per unit of time per unit area that is conducted through a slab of unit thickness of a material if the difference in temperature between opposite faces is one degree of temperature; a property of the material itself, usually represented by the letter k and called k factor.
References in periodicals archive ?
This result can be attributed to the better thermal conductivity, thermal diffusivity, and thermal radiation of the DLC.
Its effectiveness depends on size, conductivity, thermal capacity and the thermal transfer across the molten metal/chill interface.
The effects of temperature on the thermal conductivity, thermal diffusivity, and the product of density and specific heat are further discussed.
Labcell has introduced the Decagon KD2 Thermal Analyzer, a handheld instrument that is suitable for measuring thermal conductivity, thermal diffusability, thermal resistivity and temperature in foodstuffs.
SARCON[R] XR-e and XR-j thermal gap filler pads feature improved thermal conductivity, thermal resistance, consistency and elasticity.
This can clearly be seen in Figure 2, where the Seebeck coefficient, electrical conductivity, thermal conductivity, and figure of merit (which measures how good a material is for thermoelectric energy conversion) are plotted versus carrier concentration.
(4) With the conventional testing device for measuring the thermal conductivity, thermal conductivity of insulation material with moisture cannot be measured so that hot wire method was used to measure thermal conductivity of insulation material with moisture.
Besides improving electrical conductivity, thermal conductivity can also be increased at low content of carbon nanotubes (refs.
No calibration is required, as the instrument utilises a simple yet precise heating and monitoring system to give a direct readout of thermal conductivity, thermal diffusivity and temperature.
We have conducted a systematic investigation of ionic conductivity, thermal behavior and electrochemical properties of the elastomeric copolymer poly(epichlorohydrin-co-ethylene oxide) and the terpolymer poly(epichlorohydrin-co-ethylene oxide-co-allyl glycidyl ether) [ILLUSTRATION FOR FIGURE 1 OMITTED].
Sieve size (mm) Total passing (%) Individual retention (%) 19 100 0 12.5 92 8 9.5 80 12 4.75 51 29 2.36 30 21 0.6 17 13 0.3 11 6 0.15 7 4 0.075 3 4 Table 2: Summary of thermal conductivity, thermal capacity, and electrical resistivity results.
Nhi, "An extension to the dynamic plate source technique for measuring thermal conductivity, thermal diffusivity and specific heat of dielectric solids," Rev.