Hellstrom, Eric E.

E.E. Hellstrom, Co-ed., Proceedings of the International Cryogrnic Materials Conference (ICMC), Rio de Janeiro, Brazil June 2000, to be published 2001

Patents

Q. Li, E.D. Thompson, G.N. Riley, Jr., E.E. Hellstrom, D.C. Larbalestier, K.L. DeMoranville, J.A. Parrell, and J.L. Reeves, Simultaneous Constraint and Phase Conversion Processing of Oxide Superconductors, filed 2000.
E.E. Hellstrom, Method for Preparing Pb �"-Alumina Ceramic, US Patent 4,585,635 (1985).

Papers

M.O. Rikel and E.E. Hellstrom, Development of 2201 Intergrowths During Melt Processing Bi-2212/Ag Conductors, submitted to ISS 2000 Tokyo, Japan, Oct. 14-16, 2000.
M.O. Rikel, R.K. Williams, X.Y. Cai, A.A. Polyanskii, J. Jiang, D. Wesolowski, E.E. Hellstrom, D.C. Larbalestier, K. DeMoranville, and G.N. Riley, Jr., Overpressure Processing Bi2223/Ag Tapes, submitted to ASC 2000, Sept. 2000, Virginia Beach, VA.
M.O. Rikel, D. Wesolowski, Y. Yuan, and E.E. Hellstrom, Competitiveness of Porosity and Phase Purity in Melt Processed Bi2212/Ag Conductors, to appear in Physica C (Proceedings ICMC2000, Rio de Janeiro, Brazil, June 2000).
M.O. Rikel, J.L. Reeves, N.A. Scarbrough, D. Zwicky, E.E. Hellstrom, and D.C. Larbalestier, Effect of Various Processing Processing Variables on Grain Alignment at Bi-2212/Ag Interface, Submitted to M²S, Houston TX, Feb. 20-25, 2000.
J. Reeves, D. Adolphs, A. Arndt, D. Zwicky, M. Rickel, and E.E. Hellstrom, Effect of PAIR Process on Microstructure of Ag-Sheathed Bi-2212 Tapes, Physica C 341-348 (2000) 2121-2022.
M.O. Rikel, J.L. Reeves, N.A. Scarbrough, and E.E. Hellstrom, Effect of Various Processing Variables on Grain Alignment at Bi-2212/Ag Interface, Physica C 341-348 (2000) 2673-2574.

Selected Awards, Honors and Societies

Member of American Ceramic Society, Electrochemical Society, and MRS.

Summary

We are conducting research on electrical ceramics. These include high-temperature superconductors and ionic conductors. In the area of high-temperature superconductors, we focus on the materials science necessary to fabricate long lengths of superconducting wires and make magnet coils from the wire. This involves synthesizing superconductors, mechanically fabricating superconducting wires, performing thermal processing and characterizing the superconductors.

Our group is studying phase evolution, phase assemblages, chemical interactions and alignment due to chemical and thermal variables. Our work is part of a broad collaborative effort on superconductivity at the Applied Superconductivity Center. Within the Center, all aspects of the high-temperature superconductors are investigated. Through close collaborations in the Center, we learn the how the microstructure that results from our chemical synthesis and thermal processing affects the electromagnetic properties of the superconductors. We are also investigating oxygen ion conductors for use in solid oxide fuel cells. This work focuses on using oxygen-conducting perovskite-based ceramics as the solid electrolyte.

Date last modified: 31-Aug-2011
Content by: hellstrom@engr.wisc.edu
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