FREMGANGSMAATE FOR FREMSTILLING AV SILISIUMNITRIDPULVER MED LAVT KARBONINNHOLD

FREMGANGSMAATE FOR FREMSTILLING AV SILISIUMNITRIDPULVER MED LAVT KARBONINNHOLD

An improved process for preparation of silicon nitride powder having a low carbon content comprises treating silicon nitride powder with an atmosphere containing chlorine gas at temperatures from 600 DEG to 1050 DEG C. and then with an atmosphere containing gaseous oxygen.

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Bibliographische Detailangaben
Hauptverfasser: FRANZ, GERHARD, SCHOENFELDER, LOTHAR
Format: Patent
Sprache:nor
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:An improved process for preparation of silicon nitride powder having a low carbon content comprises treating silicon nitride powder with an atmosphere containing chlorine gas at temperatures from 600 DEG to 1050 DEG C. and then with an atmosphere containing gaseous oxygen.