Experimental data on thermal conductivity λ(T) of insulating materials based on Al O and MgO, collected at 400-2000K are presented. In a study, thermal conductivity of the insulation were measured by the method of monotonous heating of plate samples. Observed nonmonotonic thermal conductivity dependences on temperature, porosity, and the sizes of particles and pores were analyzed on the basis of a theoretical model. It was demonstrated that particles/pores of sizes 1-3 μm promote large scattering of heat radiation, thus, significantly diminish the increase of the material's effective thermal conductivity at high temperatures.
|Number of pages||6|
|Journal||Materials Research Society Symposium - Proceedings|
|State||Published - 1995|
|Event||Proceedings of the 1994 MRS Fall Meeting - Boston, MA, USA|
Duration: 28 Nov 1994 → 30 Nov 1994