Answer
Porosity decreases thermal conductivity of ceramic and polymetric materials because an increase in pore volume results in a reduction of thermal conductivity. Heat transfer across pores is slow and inefficient because internal pores contain air that has extremely low thermal conductivity.
Work Step by Step
Porosity decreases thermal conductivity of ceramic and polymetric materials because an increase in pore volume results in a reduction of thermal conductivity. Heat transfer across pores is slow and inefficient because internal pores contain air that has extremely low thermal conductivity.
