Applications of High-Intensity Ultrasound for Synthesis and Modification of Advanced Materials
Prozorov, Tatiana
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https://hdl.handle.net/2142/84935
Description
Title
Applications of High-Intensity Ultrasound for Synthesis and Modification of Advanced Materials
Author(s)
Prozorov, Tatiana
Issue Date
2004
Doctoral Committee Chair(s)
Kenneth S. Suslick
Department of Study
Nutritional Sciences
Discipline
Nutritional Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Condensed Matter
Language
eng
Abstract
"Applications of superconductors are determined by the critical current density, above which a superconductor becomes resistive and dissipates energy. To increase the critical value, small defects are introduced into the superconductor's bulk (""pinning""). Ultrasonic irradiation of alkane slurries containing polycrystalline superconducting materials, with Fe(CO)5 or MO(CO) 6 leads to embedding of produced in situ ferromagnetic Fe2O3 or Mo2O5 nanoparticles into the bulk of superconducting material, thus creating novel nanocomposite materials. Study conducted on obtained Fe2O3-MgB2 and Mo2O5-MgB2 nanocomposite material exhibit significant enhancement of magnetic flux pinning. Similar study focused on such promising high-Tc superconductors as YBa 2Ca3CuO7-delta and Bi2Sr 2CaCu2O8+x. (Abstract shortened by UMI.)."
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