Investigation of technology for preparation of SiC from nano SiO2
Abstract
By using a high-energy milling method, nano SÌO2 powder with a particle size of ~ 50 nm (nano SiOl) was prepared from rice husk ashes. Heating at 1550 “c for 1 hour, the complete reaction of the mixture of nano-Si02 and graphite (C) occurred and carborundum (SiC) was crystallized in a form of the smooth powder. The pure Sic powder can be used for chocked plates and pillows in the ceramic ovens and resistance tubes in high-temperature furnaces. From the investigation it was observed that SiC was grown UI the form of nano-rods when using nano- S1O2 containing impurities of FC304, CaO or A]20j. This suggests useful applications for ultraviolet LED chips and polymeric nanocomposites with specific optoelectronic properties.