C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
C30B 11/00 (2006.01) C30B 15/10 (2006.01)
Patent
CA 2634199
The invention relates to a crucible for the treatment of molten silicon comprising a basic body with a bottom surface and lateral walls defining an inner volume. According to the invention, the basic body comprises at least 65% by weight of silicon carbide, from 12 to 30 % by weight of a constituent selected from silicon oxide or nitride. Moreover, the basic body comprises at least one silicon oxide and/or nitride coating, at least on the surfaces defining the inner volume of the crucible contrarily to the state of the art crucibles, such a crucible can be used several times without any visible degradation of its physical integrity.
L~invention concerne un creuset destiné au traitement de silicium fondu comprenant un corps de base avec une surface inférieure et des parois latérales définissant un volume intérieur. Selon l~invention, le corps de base comprend au moins 65 % en poids de carbure de silicium, et de 12 à 30 % en poids d~un constituant choisi parmi le nitrure ou l~oxyde de silicium. Le corps de base comprend également au moins un revêtement en nitrure et/ou oxyde de silicium, au moins sur les surfaces définissant le volume interne du creuset. Contrairement aux creusets de l'état de la technique, un tel creuset peut être utilisé plusieurs fois sans aucune dégradation visible de son intégrité physique.
Robic
Vesuvius Crucible Company
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