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- W2045322568 abstract "Abstract SiC nanopowder was synthesized by carbothermal reduction of a low-temperature combustion synthesized (LCS) precursor derived from silicic acid, polyacrylamide (PAM), nitric acid, urea, and glucose mixed solution. The results showed that the LCS precursor is a kind of porous blocky particles. The precursors were subsequently calcined under argon at 1100–1500 °C for 2 h. The transformation of SiO 2 to SiC occurred at 1200 °C, and complete transformation of SiO 2 to SiC was achieved at 1500 °C. The SiC powder synthesized at 1500 °C is mostly composed of near-spherical particles with the diameter of 50–100 nm. Moreover, the SiC powder also contains very rare amount of whiskers with a diameter of 80 nm and a length of up to several micrometers. It is proposed that the present holes in the precursor particles during calcination are responsible for the formation of whiskers. Furthermore, the formation of mainly SiC near-spherical nanoparticles is ascribed to coarse surface of precursor particles during calcination, intimate contact among SiO 2 and C particles, uniformly formed free space during reduction reaction, and separation effect of unreacted carbon." @default.
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- W2045322568 date "2014-04-01" @default.
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- W2045322568 title "Preparation of SiC nanopowder using low-temperature combustion synthesized precursor" @default.
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- W2045322568 doi "https://doi.org/10.1016/j.matchemphys.2014.01.040" @default.
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