LUO Xianglei, LIU Yongqi, GAO Zhenqiang, LIU Ruixiang, ZHENG Bin

(School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, Shandong 255049)

Abstract: Using the steady -state heat source method, the effective thermal conductivities of 5 typical kinds of honeycomb ceramics are experimentally studied with the DRS-Ⅲ high temperature thermal conductivity tester. The experimental results show that the effective thermal conductivity of honeycomb ceramics increases with temperature rising, and they have an approximately linear relationship; the porosity and material of honeycomb ceramics influence the relationship between the effective thermal conductivity and temperature. The absolute thermal conductivity of cordierite honeycomb ceramics increases faster with temperature than that of mullite honeycomb ceramics. But the effective thermal conductivity of mullite honeycomb ceramics increases slightly faster with temperature than that of cordierite honeycomb ceramics. And the effective thermal conductivity of bigger porosity honeycomb ceramics increases faster with temperature. As an anisotropic material, the thermal conductivity of honeycomb ceramics along the axial direction is significantly greater than along the radial directions.

Key words: honeycomb ceramics; effective thermal conductivity; experimental research