Mono, T.T.MonoSchneider, VeronikaVeronikaSchneiderMartin, R.R.MartinReimann, ChristianChristianReimannFriedrich, J.J.Friedrich2022-03-082022-03-082012https://publica.fraunhofer.de/handle/publica/309845The re-usable silicon nitride ceramic crucible comprises an oxygen-enriched surface layer, which is formed by thermally oxidaizing the silicon nitride ceramic under an air atmosphere or an inert gas atmosphere at a temperature of 1050-1200[deg] C for 0.5-12 hours. An independent claim is included for a method for the preparation of a monocrystalline semi-metal body from a melt.de670Wiederverwendbarer Tiegel aus einer Siliziumnitrid-Keramik sowie dessen Verwendung bei der Herstellung eines mono- oder multikristallinen Halbmetallkörpers aus einer SchmelzeRe-usable silicon nitride ceramic crucible useful for preparing mono or multi-crystalline semi-metal body e.g. silicon ingot from melt, comprises oxygen-enriched surface layer that is formed by thermally oxidizing silicon nitride ceramicpatent102012101214