Physics for Information Science: Unit I: Electrical Properties of Materials
Thermal Conductivity
Definition, Unit, Formula
In metals, the conduction takes place not only by thermal motion of free electrons but also by thermally excited lattice vibrations, called phonons.
THERMAL CONDUCTIVITY
In
metals, the conduction takes place not only by thermal motion of free electrons
but also by thermally excited lattice vibrations, called phonons.
The
total thermal conductivity
KTotal
= Kelectron + KPhonon
In
metals thermal conductivity due to free electrons is predominant.
KTotal
=Kelectron
In
insulators the thermal conductivity due to atomic (or) molecular vibrations of
the lattice is more predominant.
KTotal
= KPhonon
In
Semiconductors both K electron and Kphonon will contribute
for thermal conduction KTotal = Kelectron +KPhonon
Definition:
Thermal conductivity of the material is defined as the amount of heat conducted
per unit area per unit time maintained at unit temperature gradient. Unit: Wm-1
K-1
Physics for Information Science: Unit I: Electrical Properties of Materials : Tag: : Definition, Unit, Formula - Thermal Conductivity
Related Topics
Related Subjects
Physics for Information Science
PH3256 2nd Semester CSE Dept | 2021 Regulation | 2nd Semester CSE Dept 2021 Regulation