| 摘要 |
<p>PURPOSE:To enable the titled heat exchange body to have a high degree of airtightness by a method wherein open pores in the surface of a partition wall of a honeycomb structure having pores passing therethrough and mainly consisting of cordierite having a porosity in a predetermined range are sealed with a filler material whose rate of thermal expansion is lower by less than 0.1% than that of the partition wall. CONSTITUTION:The heat storage type rotary heat exchange body 1 is formed of the honeycomb structure, that is, a plurality of matrix segments 2 consisting mainly of cordierite having a low rate of thermal expansion and a porosity of 20-45% and the segments 2 are made integral with one another with cordierite type bonding material 7. Further, of the pores which are present throughout the partition wall 3 and which form fluid passages the open pores 4 in the surface of the partition wall 3 are sealed with the filler material 5 consisting of cordierite and a vitreous substance and having a rate of thermal expansion lower by less than 0.1% than that of the partition wall 3 at a temperature of 800 deg.C and particularly, the pores 6 passing through the partition wall 3 are filled with the filler material 5. Thus it is possible to reduce the quantity of a fluid leaking from the matrix partition wall without deteriorating the heat resistant impact property of the partition wall.</p> |
