| 摘要 |
<p>A ceramic moulding produced by powder metallurgy including at least one disperse inorganic constituent, incorporated in a phase of aluminium oxide and/or aluminium nitride and/or aluminium oxide nitride, has (a) a length variation of less than ± 10%, preferably less than 1%, relative to the basic state, (b) a porosity of less than 15% and (c) grain boundaries free of vitreous phases. Said ceramic moulding is obtained by sintering a green compact containing, beside the dispersed inorganic constituents, at least 10 volume percent of an aluminium alloyed powder which, after treatment by sintering, is partly or completely reacted to produce Al2O3 and/or AlN and/or aluminium oxide nitride, whereby the morphology of the inorganic components dispersed within said moulding are not modified by the sintering process.</p> |
