| 摘要 |
PURPOSE:To form easily and economically a dense covering layer on a ceramic honeycomb base material by incorporating water into the ceramic honeycomb and dipping the ceramic honeycomb in a slurrylike covering material, erecting the honeycomb vertically in the covering material, sealing the top part of the honeycomb and then evacuating from below. CONSTITUTION:A ceramic honeycomb is dipped in water, then dipped further in a slurrylike covering material consisting of gamma-alumina, and boehmite. Then, the ceramic honeycomb body 1 is erected vertically in a funnellike vessel 2 having grooves cut on the surface, and a bonded part of the honeycomb is sealed with a gasket 3. Further, an upper open part of the honeycomb is sealed tightly with a rubberlike sheet 4, and the whole body of the honeycomb is fixed to a desiccator 5 and the whole body is evacuated with a vacuum pump 6. Thus, a dense covering layer is formed easily and economically on a ceramic honeycomb base material. |
