Advantages of barium peroxide in the powder synthesis of perovskite superconductorsThis paper compares reaction chemistry, material processing, and material characteristics for the solid state reaction using BaCO3 or BaO2 in the synthesis of perovskite superconductors. Results are presented for weight loss and X-ray diffraction, sample morphology and homogeneity as monitored by SEM and EDS, and the superconductivity critical temperature and ac susceptibility. Greater mass density, increased sample homogeneity, lower resistance, and improved reproducibility for material are found when BaO32 is used.
Document ID
19880054269
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hepp, A. F. (NASA Lewis Research Center Cleveland, OH, United States)
Gaier, J. R. (NASA Lewis Research Center Cleveland, OH, United States)
Philipp, W. H. (NASA Lewis Research Center Cleveland, OH, United States)
Warner, J. D. (NASA Lewis Research Center Cleveland, OH, United States)
Garlick, R. G. (NASA Lewis Research Center Cleveland, OH, United States)
Pouch, J. J. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Subject Category
Solid-State Physics
Meeting Information
Meeting: High-temperature superconductors
Location: Boston, MA
Country: United States
Start Date: November 30, 1987
End Date: December 4, 1987
Sponsors: Materials Research Society, NSF, U. S. Navy