Synthesis of spherical beta-silicon carbide particles by ultrasonic spray pyrolysis
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Fine agglomerate-free spherical beta-SiC powder was synthesized from a dispersion of colloidal silica, saccharose, and boric acid, by means of an ultrasonic spray pyrolysis method, Droplets of 2.2 mu m were formed with an aerosol generator, operated at 2.5 MHz, and carried into a reaction furnace at 900 degrees C with argon, Spherical X-ray amorphous gel particles of 1.1 mu m were obtained, beta-SiC particles with a mean diameter of 0.79 mu m and spherical shape resulted when the SiC gel precursor particles were heated at 1500 degrees C in argon.
Извор:Journal of the American Ceramic Society, 1996, 79, 8, 2215-2217
ISSN: 0002-7820 (Print)