Abstract
ZrC powders were synthesized by carbothermal reduction of a combustion synthesized precursor derived from zirconium nitrate, urea, and glucose mixed solution. The results showed that the obtained precursor was comprised of polyporous blocky particles. The precursor powders were subsequently calcined under argon at 1200–1600°C for 3h. The transformation of ZrO2 to ZrC, by adopting this route, occurred at 1300°C. The preparation of ZrC experienced an intermediate phase of ZrOxCy. ZrC powders synthesized at 1500°C are characterized by the spherical shape, small particle size (120–180nm in diameter), low oxygen content (1.4wt.%) and non-aggregated particles.
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