| ??? 04/01/09 07:09 Read: times |
#164120 - For all solid materials, are you sure? Responding to: ???'s previous message |
Per Westermark said:
Measuring thermal and electrical conductivity should be possible for all solid materials. Liquid materials will introduce problems since they will not just conduct heat, but also transport heat by circulation. Materials in a gaseous state will be hardest to handle.
In some situations - such as ESD bags - you want to consider surface resistivity instead. A material could be wood pulp , a stone , a concrete mixture etc ? It indirectly depends on the speed of sound but also mean free path also the electrons could get excited to great speeds comparable to speed of light, but as it doesnt have a mean free path it will go no where. It can hold for semiconductors as well not for a general term "Materials" . You say all solid materials , ok then how would you explain this solid material 'Thermocell'(http://www.goodsonassociates.com/pages/ins...ating.html ). -Ap |
