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NTIS 바로가기Journal of materials science, v.36 no.4, 2001년, pp.995 - 999
Koc, Rasit (Southern Illinois University at Carbondale Department of Mechanical Engineering and Energy Processes, Carbondale, IL 62901, USA kocr@siu.edu) , Glatzmaier, Gregory (National Renewable Energy Laboratory, Golden, CO 80401, USA) , Sibold, Jack (TDA Research, Inc., Wheat Ridge, CO 80033, USA)
A novel synthesis process, developed for producing high purity, submicron, non-agglomerated and low cost β-SiC powders. The process is based on carbothermal reduction reaction of a novel coated precursor. The precursor is derived from a silica gel and a hydrocarbon gas and provides high contact area between reactants. This yields a better distribution of carbon within the silica gel and results in a more complete reaction and a purer product. The powders produced in this process have a low oxygen content (less than 0.8 wt.%), very fine particle size (0.1–0.3 μm), narrow particle size distribution, non-agglomerated and are low cost. The sintering tests demonstrated that these powders can be pressureless-sintered to near theoretical density at about 2100°C in an inert atmosphere. No decarburization and no acid purification process was required before sintering.
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