| 摘要 |
<p>Process for the production of moulded bodies of materials based on silicon nitride, where the powder mix prepared by way of initial material contains silicon nitride (Si3N4), a high proportion, preferably 40-85 per cent by weight, of silicon (Si) and a sintering aid. With conventional sintering the above powder mix is advantageously prepared by grinding of an Si-powder dispersed in an Si3N4 powder the grain size of which is considerably lower than that of the Si-powder. The process covers in the main the production of a body moulded from this powder mix by known moulding methods, nitriding of the Si-content to Si3N4 and sintering of the moulded body to a final required density.</p> |
