Publication


Featured researches published by Roger B. Poeppel.


IEEE Transactions on Applied Superconductivity | 1999

Near-net-shape fabrication of continuous Ag-clad Bi-based superconductors

Michael T. Lanagan; K. C. Goretta; D. K. Walter; Roger B. Poeppel; R. Troendly; Michael J. McNallan; S. Danyluk

We have developed a near-net-shape process for Ag-clad Bi-2212 superconductors. This alternative to the powder-in-tube process offers the advantages of nearly continuous processing, minimization of processing steps, reasonable ability to control the Bi-2212/Ag ratio, and early development of favorable texture of the Bi-2212 grains. The powder is rolled into an Ag channel, a cap is applied, and the assembly is lightly rolled. To minimize distortion during heat treatment, it is especially important that the Bi-2212 powder be nearly free of volatile species such as carbon. A vacuum-calcination process was developed to control CO/sub 2/ evolution during heating. Superconducting properties are discussed.


Archive | 1988

Monolithic solid electrolyte oxygen pump

Darrell C. Fee; Roger B. Poeppel; Timothy E. Easler; Dennis W. Dees


Archive | 1995

Synthesis of highly phase pure BSCCO superconductors

Stephen E. Dorris; Roger B. Poeppel; Barton C. Prorok; Michael T. Lanagan; Victor A. Maroni


Archive | 1994

Synthesis of highly phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor

Stephen E. Dorris; Roger B. Poeppel; Barton C. Prorok; Michael T. Lanagan; Victor A. Maroni


Archive | 1997

Near net shape processing of continuous lengths of superconducting wire

Steven Danyluk; Michael J. McNallan; Robert Troendly; Roger B. Poeppel; K. C. Goretta; Michael T. Lanagan


Archive | 1996

Method of producing improved microstructure and properties for ceramic superconductors

Jitendra P. Singh; Rob A. Guttschow; Joseph T. Dusek; Roger B. Poeppel


Archive | 1996

Thermomechanical means to improve the critical current density of BSCCO tapes

Uthamalingam Balachandran; Roger B. Poeppel; Pradeep Haldar; L. R. Motowidlo


Archive | 1995

Method of manufacture of single phase ceramic superconductors

Jitrenda P. Singh; Roger B. Poeppel; K. C. Goretta; Nan Chen


Archive | 1992

Recent progress towards developing a high field, high-T(sub c) superconducting magnet for magnetic suspension and balance systems

L. Pierre Derochemont; Carlton E. Oakes; M.R. Squillante; H.M. Duan; Allen M. Hermann; Robert J. Andrews; Roger B. Poeppel; Victor A. Maroni; Ingrid A. Carlberg; Warren C. Kelliher


Archive | 1991

Formation of intermediate compounds during reduced pressure calcination of Y-Ba-Cu-O precursor

Uthamalingam Balachandran; Sherry L. Morissette; R. Andrew Russell; Stephen E. Dorris; Roger B. Poeppel

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