| 摘要 |
PURPOSE: To obtain the subject product improved in mechanical strength, the accuracy during processing therefor and surface accuracy, by filling or impregnating a porous ceramic with a thermosetting resin followed by curing the resin and then abrading the resultant surface with a specific whetstone. CONSTITUTION: Firstly, a porous ceramic essentially having open cells each 1-1000μm in diameter is filled or impregnated with a thermosetting resin such as phenolic resin, epoxy resin or xylene resin, in combination with a curing agent or regulation of the resin viscosity with a diluent, if needed. The thermosetting resin is a 100% organic material, being <=1wt.% in ash content. For the filling or impregnation, the ceramic is immersed in the liquid resin the system as a whole is subjected to reduced pressure by a vacuum defoaming machine. The resin is completely cured by heat or the curing agent, the resultant ceramic surface is abraded e.g. with a combination of a double side grinder and abrasive material. For the whetstone or abrasive grains, cermet, diamond, silicon carbide, boron nitride, alumina corundum, etc., is used; after abrasion, the resultant ceramic is heated to the decomposition temperature of the resin or higher under controlled temperature raising speed to restore the porosity of the original ceramic.
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