Process for production of crystallized glass and process for producing composite article using said crystallized glass

A process for producing a ceramics-crystallized glass composite article having superior mechanical properties, thermal properties and mechanical workability, which comprises

• (1) mixing at least one ceramic material selected from powders, flakes and fibers of ceramics, a glass powder and an organometallic polymer in the optional presence of an organic solvent, said polymer being soluble in an organic solvent and having a skeleton comprising (a) titanoxane linkages --Ti--O-- or zirconoxane linkage --Zr--O-- or both and (b) siloxane linkages --Si--O-- in which most of the silicon atoms have as a side chain at least one organic group selected from alkyl and phenyl groups, and optionally (c) boroxane linkages --B--O-- or aluminoxane linkage --Al--O-- or both;
• and
• (2) either (i) molding the resulting mixture and then firing the molded article in an oxidizing atmosphere or (ii) molding and firing the resulting mixture simultaneously in an oxidizing atmosphere, thereby to bond said ceramic material by the glass at least partly crystallized.