Obtaining sialon from silicon-containing raw materials in the mode of self-propagating high-temperature synthesis using sodium azide and aluminum halogenides

The possibility of obtaining sialon in the SHS-Az mode (self-propagating high-temperature synthesis using sodium azide) from the systems "silicon dioxide – sodium azide – aluminum halogenide – silicon" is viewed. The phase composition and combustion products are analyzed and the average particle size is determined. It was found that particles of a combustion product were combined into agglomerates. The average size of plate-like particles was 300...350 nm, and equiaxed particles – 120...170 nm.