Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 59, Issue 2, Pages 205-214Publisher
SPRINGER
DOI: 10.1007/s10971-011-2482-z
Keywords
Sol-gel; Nano particles; Dispersant; Powder synthesis
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Nano sized beta-SiC particles were synthesized from sol-gel process. Mono dispersed beta-SiC nano particles with semi spherical morphology were obtained by employing APC as a dispersant agent and adjusting pH in the range of 2.5-4. Phenolic resin and TEOS were employed as precursors and heat treatment was conducted up to 1500 A degrees C. Different techniques such as XRD, DTA, FTIR, PSA, SEM and TEM were used to characterize the formation of beta-SiC. The (Si-O-C) bonds were formed by hydrolysis and condensation reactions in the gel while the nucleation of crystalline beta-SiC was found to be initiated at 1400 A degrees C. The primary particles in the sol were found to be (< 10 nm) while the size distribution in the final product was recorded in the range of 30-50 nm.
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