Method for maufacturing a sintered body with high density.

摘要

A method is provided for manufacturing a sintered body comprising the steps of: heating a membrane of an inorganic polysilazane in liquid formed on the surface of a porous body to oxidize a surface portion of the layer into an oxide layer and still pyrolyzing the remaining of the inorganic polysilazane, the inorganic polysilazane being given by the formula of (-SiH2NH-)n where n represents degree of polymerization; softening the oxide layer to make it impermeable; and sintering the porous body with the oxide layer having impermeability at high pressure and at high temperature n of degree of polymerization ranges 6 to 25. The layer is of 0.5 to 2.0mm in thickness.