Patent ID: 6783866
Filing Date: 2004-08-31
Classification: C08K,Y10T

Abstract:
A molded part or a composite construction including said molded part and one or more parts of other materials, said molded part comprising a polymer ceramic material, and wherein said molded part is obtained by a method comprising the steps of:mixing together and mold-shaping at least one polymer and one or more ceramic fillers selected from the group consisting of Al2O3, MgO, cubic or partially stabilized ZrO2, CeO2, CaTiO3, C, CaF2, SiC, Cr3C2, Fe2TiO5, MgFe3O4, phosphate glasses, Si3N4, and TiO2; subjecting the mixture to cross-linking, resulting in a precursor stage of the molded part; and subjecting said precursor stage of the molded part to a partial pyrolysis; where, in the case of a composite construction, said method further comprises a step of incorporating one or more parts of other materials before the crosslinking and/or after the partial pyrolysis; wherein the polymer and the ceramic filler are provided in weight ratios, said ratios and said partial pyrolysis are selected on the basis of theoretically or empirically ascertained values, such that the resultant molded part has a thermal expansion behavior comparable to that of a metal, and after the partial pyrolysis has the same linear dimensions as the precursor stage of the molded part prior to partial pyrolysis, with a tolerance of equal to or less than 0.1%.