RECYCLING OF INDUSTRIAL AND NATURAL WASTES TO SiAlONs

SiAlON ceramics were successfully produced from industrial wastes such as silicon sludge and aluminum dross by the nitriding combustion process. The silicon oxynitride as one phase in the sialons system was synthesized from desert sand as well. The nitriding combustion as an energy saving and recycling process, powder synthesis of SiAlONs, mechanical, thermal and chemical properties of the sintered products, and potential applications are reported.