PROCESS FOR THE PREPARATION OF SILICON NITRIDE BY SILICA CARBONITRURATION AND SILICON NITRIDE AS PARTICLES EXEMPT FROM WHISKEY.

摘要

The invention relates to a process for the preparation of silicon nitride. BR/ According to this process a primary mixture of silica and carbon is taken up and included in a matrix or a porous carbon-based layer before carbonitriding reaction. BR/ This process makes it possible to obtain Si3 N4 in the form of particles of regular and controlled shape, free from whiskers. / P