PROCESS FOR THE PREPARATION OF SILICON NITRIDE BY CARBONITRIDING SILICA AND SILICON NITRIDE IN THE FORM OF WHISKER-FREE PARTICLES

摘要

The invention relates to a process for the preparation of silicon nitride. According to this process, a primary mixture of silicon and carbon is taken and incorporated in a matrix or a porous layer based on carbon before the carbonitridation reaction. This process makes it possible to obtain Si3N4 in the form of particles of regular and controlled shape, free of whiskers.