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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Porcelain is a great thermal conductor. It will pick up the air temperature whether you are heating or cooling it.
Patent 9,688,897 (June 27, 2017), "Carbon Nanotube Composite Material and Thermal Conductor," Kenji Hata and Seisuke Ata (National Institute of Advanced Industrial Science and Technology, Tokyo,japan).
Duke University engineers have developed a new way of producing thermal diodes, devices which regulate heat to preferentially flow in a certain direction, effectively creating a thermal conductor in the forward direction and an insulator in the reverse direction.
Moreover, FlexiDry complements underfloor heating perfectly by serving as a good thermal conductor and keeping the energy requirement at the source low.
Graphene boasts some very special characteristics - it is extremely tear-resistant, an excellent thermal conductor, and reconciles such conflicting qualities as brittleness and ductility.
What's more, graphene is itself a good thermal conductor, allowing heat to dissipate quickly." These capabilities allow the graphene transistors to operate at much faster speeds than silicon-based devices.
It is an excellent thermal conductor while being electrically insulating.
Because water is an excellent conductor of heat, moisture in a permeable insulation transforms insulation into a thermal conductor. This opens the door for additional problems, including dripping pipes that damage ceiling systems, walls, floors, equipment, and/or furnishings.
Some of beryllium's advantages are that it is light (one-third lighter than the next lightest metal, aluminum), strong (six times stronger than steel), less prone to expand and shrink, magnetically more transparent, and a better electrical and thermal conductor than alternative materials.
At low temperatures, the fused silica shell has a lower thermal conductivity, since fused silica is a poorer thermal conductor than alumino-silicate and the shell porosity is higher.