Abstract
Ultrafine silicon powders with a mean particle diameter of 20–200 nm and a mean crystallite diameter of 18–37 nm were synthesized from high purity SiH4 by laser induced gas phase reactions. The Si powders have been characterized by TEM, XPS, FTIR, XRD and BET techniques, and the effects of processing variables including SiH4 flow rate, laser power, cell pressure and the ArSiH4 ratio on the formation of the Si powders have been studied. Results showed that the powders consisted of monodispersed spherical particles, and agglomerated particles; both types of particles have polycrystalline structure, which resulted from the interparticle collision growth during the formation of the powders. The nonagglomerated spherical particles with a small size werefavored to form with a lower laser power and higher ArSiH4 ratios. The Si powders have O-Si-H surface configuration due to oxidation when exposed to air.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
