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Synthesis of Spherical β‐Silicon Carbide Particles by Ultrasonic Spray Pyrolysis
Author(s) -
Čerović Ljiljana S.,
Milonjić Slobodan K.,
Zivković Ljilana V.,
Uskoković Dragan P.
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08964.x
Subject(s) - agglomerate , materials science , pyrolysis , silicon carbide , argon , amorphous solid , dispersion (optics) , particle (ecology) , chemical engineering , ultrasonic sensor , colloid , composite material , crystallography , chemistry , optics , organic chemistry , physics , oceanography , engineering , geology , acoustics
Fine agglomerate‐free spherical β‐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 μm were formed with an aerosol generator, operated at 2.5 MHz, and carried into a reaction furnace at 900°C with argon. Spherical X‐ray amorphous gel particles of 1.1 μm were obtained. β‐SiC particles with a mean diameter of 0.79 μm and spherical shape resulted when the SiC gel precursor particles were heated at 1500°C in argon.