NDLI: Formation of anisotropic Tl-1212, Tl-2212, Tl-1223 and Tl-2223 particles using aerosol flow reacted powders

Content Provider	IEEE Xplore Digital Library
Author	Paranthaman, M. Goyal, A. Heatherly, D.E. Kroeger, D.M.
Copyright Year	2002
Abstract	Highly anisotropic particles of Tl-1212, Tl-2212, Tl-1223 and T1-2223 superconductors were grown. The Tl-free precursor powders with the compositions Ba/sub 1/Ca/sub 2/Cu/sub 3/Ag/sub 0.37/O/sub 6/ and Ba/sub 2/Ca/sub 2/Cu/sub 3/Ag/sub 0.37/O/sub 7/ were prepared using an aerosol flow reactor. These precursor powders were then post-annealed in 0.1 atm oxygen at 700/spl deg/C for 4 h to reduce the carbon present and mixed with Tl/sub 2/O/sub 3/ (typical composition of Tl/sub x/; x=0.6-1.0). The Tl-containing powders were heated, in sealed gold tubes between 650-890/spl deg/C for various times. X-ray diffraction showed that the Tl-2212 and Tl-2223 phases were stable over a wide range of temperatures. Scanning electron microscopy showed evidence for the presence of high aspect-ratio particles. These highly anisotropic particles may of interest for the preparation of powder-in-tube and other powder deposited conductors, for current leads, and for grain alignment studies.<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1490
Ending Page	1493
Page Count	4
File Size	492199
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	Anisotropic magnetoresistance Aerosols Powders Superconductivity Inductors Gold X-ray diffraction Temperature distribution Scanning electron microscopy Conductors
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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