Phase composition of the products of nitriding ferrosilicon with zircon concentrate additives

Combustion of Ferrosilicon–Zircon Mixtures in Nitrogen Gas: Impact of Aluminum Additives

“…In this way, Si 3 N 4 -ZrO 2 -Si 2 N 2 O-Fe powders can be fabricated without external power supply. Upon acid leaching, the iron content of Si 3 N 4 -ZrO 2 -Si 2 N 2 O powder did not exceed 0.5% [13].…”

Interaction of ferrosilicon with nitrogen in the presence of zircon and ilmenite concentrates in the process of self-propagating high-temperature synthesis

“…At T = 1687°C, the eutectic of the composition 5%ZrO 2 -95%ZrO 2 forms, but the larger part of ZrO 2 remains in the solid phase. Zircon trans forms according to the scheme (4) The melt based on the ZrO 2 -SiO 2 eutectic, when interacting with the iron-silicon melt, forms gaseous silicon monoxide: (5) which can be subjected to further nitriding with the formation of silicon oxynitride (Si 2 N 2 O) according to the schemes (6) 2SiO(g) + N 2 Si 2 N 2 O + ½O 2 .…”