NDLI: Superconducting Tl-Pb-Ba-Sr-Ca-Cu-O(Ag) thick films (5-20 /spl mu/m) prepared using a commercial spray pyrolysis system and 2-zone furnace annealing

Content Provider	IEEE Xplore Digital Library
Author	Schulz, D.L. Parilla, P.A. Ginley, D.S. Voigt, J.A. Roth, E.P. Venturini, E.L.
Copyright Year	2002
Abstract	A spray pyrolysis route to superconducting Pb-, Sr-, and Ag-substituted Tl-Ba-Ca-Cu-O thick films has been developed. First, a precursor powder with the stoichiometry Pb/sub 0.46/Ba/sub 0.40/Sr/sub 1.52/Ca/sub 1.86/Cu/sub 3.00/O/sub x/(Ag/sub /0/sub .37/) (PBSCCO) was synthesized with the particle size of this powder being subsequently reduced to 4-6 /spl mu/m using a ball mill. Next, this powder was mixed with ethyl cellulose binder and sprayed with an airbrush using an N/sub 2/ carrier gas, polycrystalline Y/sub 2/O/sub 3/:ZrO/sub 2/ (YSZ) as single-crystal MgO, SrTiO/sub 3/, NdGaO/sub 3/, and LaAlO/sub 3/ substrates were mounted on a hot plate with typical growth temperatures of 80-100 /spl deg/C. Growth times of /spl sim/10 min provided films which were 5-20 /spl mu/m in thickness. After an intermediate O/sub 2/ anneal to remove the organic binder, these films were subjected to a flowing 2-zone thallination process. Very well c-axis oriented Tl/sub 0.70/Pb/sub 0.36/Ba/sub 0.39/Sr/sub 1.58/Ca/sub 1.98/Cu/sub 3/O/sub x/ (TP-1223) phase material was obtained for films grown on single-crystal LaAlO/sub 3/. Films grown on all other substrates surveyed in the study gave rise to impurity phase formation and/or incomplete reaction. The PBSCCO and TP-1223 films were characterized by /spl theta//2/spl theta/ and /spl omega/-rocking curve X-ray diffraction (XRD) analyses, scanning electron microscopy (SEM), variable temperature magnetic measurement, and inductively coupled plasma atomic emission spectroscopy (ICPAES).<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1962
Ending Page	1965
Page Count	4
File Size	449132
File Format	PDF
ISSN	10518223
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting films Thick films Spraying Furnaces Annealing Powders Plasma temperature Strontium Magnetic films Scanning electron microscopy
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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