The invention relates to a method of preparing a product containing, as a single crystalline phase, a solid solution or .beta.'-sialon type having the general formula Si.sub.6-Z Al.sub.Z O.sub.Z N.sub.8-Z where Z=1 to 4, which comprises heating in a nitrogen atmosphere, at 1400.degree.-1600.degree. C.,...http://www.google.ca/patents/US4360506?utm_source=gb-gplus-sharePatent US4360506 - Method of preparing sialon products
