List of thermal conductivities

In physics, thermal conductivity, k, is the intensive property of a material that indicates its ability to conduct heat.

First, we define heat conduction by the formula::: $$H=frac{Delta Q}{Delta t}=k imes A imesfrac{Delta T}{x}where $$frac{Delta Q}{Delta t} is the rate of heat flow, "k" is the thermal conductivity, "A" is the total surface area of conducting surface, Δ"T" is temperature difference and "x" is the thickness of conducting surface separating the 2 temperatures.

Thus, rearranging the equation gives thermal conductivity,

:: $$k=frac{Delta Q}{Delta t} imesfrac{1}{A} imesfrac{x}{Delta T}

(Note: $$frac{Delta T}{x} is the temperature gradient)

This list makes up the data for the smaller list provided in Thermal conductivity.

Please note that mixtures may have variable thermal conductivities due to its composition.

References

:^a [http://www.hbcpnetbase.com/ CRC handbook of chemistry and physics] (subscription is required to access the data):^b [http://www.marble-institute.com/industryresources/rvalue.cfm Marble Institute of America] (2 values are usually given: the highest and lowest test scores):^c [http://soil.scijournals.org/cgi/content/figsonly/64/4/1285 Soil Sci Journals] :^d [http://hyperphysics.phy-astr.gsu.edu/hbase/tables/thrcn.html HyperPhysics] , also from Young, Hugh D., University Physics, 7th Ed. Table 15-5. (data from HyperPhysics should be all at 20^oC):^e [http://www.hukseflux.com/thermalScience/thermalConductivity.html Hukseflux Thermal Sensors] :^f [http://www.engineersedge.com/properties_of_metals.htm Engineers Edge] :^g [http://www.goodfellow.com/ GoodFellow] :^h [http://www.fpl.fs.fed.us/documnts/fplgtr/fplgtr113/ch03.pdf Physical Properties and Moisture Relations of Wood] :ⁱ Other listings within Wikipedia references (this table may not be cited, pure elements are sourced from Chemical elements data references, otherwise an in-table linked-page must list the relevant references):^j Clarity requires that no reference is to use this letter:^k [http://eetd.lbl.gov/ECS/Aerogels/sa-thermal.html Thermal Properties - Silica Aerogels] :^l [http://www.industrialpress.com/en/MachinerysHandbook/default.aspx] Machinery's Handbook - properties of materials p404] :^m cite journal | author=Greg Becker, Chris Lee, and Zuchen Lin | title=Thermal conductivity in advanced chips — Emerging generation of thermal greases offers advantages | journal=Advanced Packaging | month=Jul | year=2005 | pages=pp.2–4 | url=http://www.apmag.com/ | accessdate=2008-03-04 :^z [http://www.engineeringtoolbox.com/thermal-conductivity-metals-d_858.html EngineeringToolbox.com]

[http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatcond.html#c1 Heat Conduction Calculator]

Thermal conductivity of air as a function of temperature can be found at [http://users.wpi.edu/~ierardi/PDF/air_k_plot.PDF James Ierardi's Fire Protection Engineering Site]

See also

*Thermal conductivity
*Thermal conductivities of the elements (data page)