Conduction is the flow of heat through a body occurring without displacement of the particles which make up the body

Conduction is the flow of heat through a body occurring without displacement of the particles which
make up the body. Fourier’s law of heat conduction is the basic law which says that the rate of heat flow
across a unit area ? at steady stale is proportional to the temperature gradient perpendicular to the
area. Heat flow in one dimension, i. e. in X is?T
??  is the tem is the area which is assumed to be invariant along the heat flow
path. The constant K is thermal conductivity of the material through which heat is flowing. The thermal
co
perature gradient and A
nductivity of the material indicates the relative ease or difficulty of the transfer of heat through the
material. K can vary from about 0.01 W
?K
for gases to 1000 W
?K
for pure metals. Thermal conductivity
depends, on temperature, bonding and structure of the material. Thermal conductivity for ceramic
materials   lower than metals. Po the material de K. Thermal conductivity of the material
varies with the temperature. The variation of thermal conductivity with temp can be described
by