SYNTHESS AND CHARACTERIZATON OF TUNGSTEN TROXDE NANOPARTICLES FROM THE ORIGN OF WC-%6CO SCRAPES BY A SOL-GEL METHOD
سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 345
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شناسه ملی سند علمی:
UFGNSM03_215
تاریخ نمایه سازی: 10 تیر 1396
چکیده مقاله:
In current research work WC-%6Co scraps were employed as starting materials for synthesizing tungsten oxide (WO3) nano-particles. As a medium product sodium tungstate (Na2WO4) was prepared by alkaline fusion of WC-%6Co scrapes at 680-700C. Then sodium tungstate solution was let to flow through a buret packed with protonated cation-exchange resin. The effluent was dropped in an oxalic acid solution and after stirring for 24 hours at room temperature, the colorless solution was heated at 150C. The subsequent calcination of white dried powders at 500C for 6 hours, caused the formation of yellow tungsten oxide. The purity of sodium tungstate solution was analyzed by atomic absorption spectroscopy. Synthesized WO3 nano-particles were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy and energy dispersive spectroscopy analysis methods. It was found that pure WO nano-particles with average particle size of 67 nm were successfully synthesized. The most figure of merit of this work is to use WC-%6Co scrapes as starting materials to fabricate WO nanopowders.
کلیدواژه ها:
نویسندگان
SAMANEH. SADEGHINEZHAID
Department of Materials Engineering, Maleke Ashtar University of Technology, Shahinshahr, Isfahan, Iran.
GHOLAM. HOSSEIN. BORHANI
Department of Materials Engineering, Maleke Ashtar University of Technology, Shahinshahr, Isfahan, Iran.,
ALI. GHASEMI
Department of Materials Engineering, Maleke Ashtar University of Technology, Shahinshahr, Isfahan, Iran.