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Ultrasonic Spray Pyrolysis for Synthesis of Spherical Zirconia Particles
Author(s) -
Song Y. L.,
Tsai S. C.,
Chen C. Y.,
Tseng T. K.,
Tsai C. S.,
Chen J. W.,
Yao Y. D.
Publication year - 2004
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.1151-2916.2004.tb06332.x
Subject(s) - materials science , pyrolysis , scanning electron microscope , cubic zirconia , particle size , ultrasonic sensor , spray pyrolysis , chemical engineering , drop (telecommunication) , particle (ecology) , yttria stabilized zirconia , nebulizer , analytical chemistry (journal) , composite material , nanotechnology , ceramic , chromatography , chemistry , thin film , physics , anesthesia , geology , computer science , acoustics , engineering , medicine , telecommunications , oceanography
This paper presents new findings on ultrasonic spray pyrolysis of zirconium hydroxyl acetate precursor drops whose sizes were precisely measured using laser light diffraction technique. Precursor concentration plays a predominant role in determination of product particle size. At 0.01 wt% precursor concentration, conventional spray pyrolysis at 750°C using precursor drops 5–8 μm in diameter, generated by an ultrasonic nebulizer at 2.66 MHz, yielded uniform spherical yttria‐stabilized zirconia (YSZ) particles 73 nm in diameter measured by scanning electron microscopy. The YSZ particle diameters were much smaller than those predicted by the one‐particle‐per‐drop mechanism. Under similar reaction conditions, the high‐throughput ultrasound‐modulated two‐fluid (UMTF) spray pyrolysis of larger precursor drops (28‐μm peak diameter) also yielded spherical dense particles; they were significantly smaller in size than those produced by the low‐throughput conventional ultrasonic spray pyrolysis of smaller drops (6.8‐μm peak diameter).