Preparation of ultrafine TiC, MgAl₂O₄ and AlON composite powder using chemical furnace

Preparation of ultrafine TiC, MgAl₂O₄ and AlON composite powder using chemical furnace

AlON and TiC have good corrosion properties in special refractories such as for trough refractories, submerged nozzles and sliding gate nozzles, but the cost of producing these materials is still higher than oxide refractories. Combustion reactions are performed on samples composed of carbon black, titanium, titanium oxide, Al, MgAl and aluminum dross powders by use of a self propagation high temperature synthesis (SHS) process. A chemical furnace is employed for SHS reactions between substances with a high heat of formation of the final product such as in the titanium-carbon system. The TiC and MgAl2O4 composite particles are prepared by the thermite reaction of TiO2, Al and MgAl alloy and carbon black. The phases are characterized by X-ray diffraction. The microstructure and chemical composition are studied by scanning electron microscopy and XRF, respectively.

AlON and TiC have good corrosion properties in special refractories such as for trough refractories, submerged nozzles and sliding gate nozzles, but the cost of producing these materials is still higher than oxide refractories. Combustion reactions are performed on samples composed of carbon black, titanium, titanium oxide, Al, MgAl and aluminum dross powders by use of a self propagation high temperature synthesis (SHS) process. A chemical furnace is employed for SHS reactions between substances with a high heat of formation of the final product such as in the titanium-carbon system. The TiC and MgAl2O4 composite particles are prepared by the thermite reaction of TiO2, Al and MgAl alloy and carbon black. The phases are characterized by X-ray diffraction. The microstructure and chemical composition are studied by scanning electron microscopy and XRF, respectively.