Silver Nanoparticles from Ultrasonic Spray Pyrolysis of Aqueous Silver Nitrate
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Authors: Kalyana C. Pingali, David A. Rockstraw and Shuguang Deng of New Mexico State University
Abstract:
Authors conduct a study utilizing different concentrations of silver nitrate and varying frequencies of ultrasonic spray nozzles to manipulate the size of silver nanoparticle formation. The design of experiment used a wide range of ultrasonic nozzles from 25 KHz to 120 KHz which atomized a solution of silver nitrate in an inert argon atmosphere.
By changing both choice of ultrasonic nozzle frequency and concentration of solution, the study was able to demonstrate particle formation from 20nm up to 300nm.
Ultrasonic Spray Pyrolysis for Synthesis of Spherical Zirconia Particles
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Authors: Y. L. Song, S. C. Tsai, C. Y. Chen, T. K. Tseng, C. S. Tsai, J. W. Chen, and Y. D. Yao from the Institute for Applied Science and Engineering Research, Academia Sinica, Taipei, Taiwan; Department of Chemical Engineering, California State University, Long Beach, California; Department of Electrical Engineering and Computer Science, University of California, Irvine, California; Department of Physics, National Taiwan University, Taipei, Taiwan; and Institute of Physics, Academia Sinica, Taipei, Taiwan
Abstract:
Spray pyrolysis of yttria-stabilized zirconia (YSZ) were studied using conventional ultrasonics nebulizers versus 120 kHz ultrasonic spray nozzle to determine the best resulting particle size. Even though the droplet size formed at the tip of an ultrasonic spray nozzle was much larger than the initial droplet size from a ultrasonic nebulizer, the resulting particle size produced from a ultrasonic spray nozzle was found to be smaller and more uniform.
Ultrasonic Spray Pyrolysis for Fabrication of Solid Oxide Fuel Cell (SOFC) Cathode
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Author: Hoda Amani Hamedani
A novel vertical ultrasonic spray pyrolysis system is described utilizing a tubular quartz reactor, a positive displacement pump and high frequency ultrasonic spray nozzle. LSM films were deposited onto a YSZ electrolyte substrate. A variety of coatings were created by changing process variables such as the distance of substrate from ultrasonic nozzle, temperature, flow rates and precursor blends. Good source pictures are included in the paper.