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- Title
Ultrasonic Spray Pyrolysis for Synthesis of Spherical Zirconia Particles.
- Authors
Song, Y. L.; Tsai, S. C.; Chen, C. Y.; Tseng, T. K.; Tsai, C. S.; Chen, J. W.; Yao, Y. D.
- Abstract
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).
- Subjects
ZIRCONIUM; ACETATES; PYROLYSIS; ULTRASONICS; OPTICAL diffraction; SCANNING electron microscopy
- Publication
Journal of the American Ceramic Society, 2004, Vol 87, Issue 10, p1864
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1151-2916.2004.tb06332.x