Starting materials and superconductor stoichiometry

C. E. Hamrin; W. D. Arnett; R. J. De Angelis; X. X. Ding; W. D. Ehmann

doi:10.1016/0038-1098(89)90487-0

Starting materials and superconductor stoichiometry

C. E. Hamrin, W. D. Arnett, R. J. De Angelis, X. X. Ding, W. D. Ehmann

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Oxygen contents of as-received La₂O₃ and Nd₂O₃ were determined by fast neutron activation analysis. X-ray diffraction was used to determine the phases present in these materials. Results of these analyses show that significant amounts of hydroxides (in one case over 90 wt%) were present in all oxide samples. These results carry tremendous implications for the stoichiometry of the superconductor formation reaction and the composition of the final product. The most important conclusion to be drawn from this study is that many of the bulk superconducting ceramics produced to date may be of approximate composition at best.

Original language	English (US)
Pages (from-to)	1063-1066
Number of pages	4
Journal	Solid State Communications
Volume	69
Issue number	11
DOIs	https://doi.org/10.1016/0038-1098(89)90487-0
State	Published - Mar 1989
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(89)90487-0

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title = "Starting materials and superconductor stoichiometry",

abstract = "Oxygen contents of as-received La2O3 and Nd2O3 were determined by fast neutron activation analysis. X-ray diffraction was used to determine the phases present in these materials. Results of these analyses show that significant amounts of hydroxides (in one case over 90 wt%) were present in all oxide samples. These results carry tremendous implications for the stoichiometry of the superconductor formation reaction and the composition of the final product. The most important conclusion to be drawn from this study is that many of the bulk superconducting ceramics produced to date may be of approximate composition at best.",

author = "Hamrin, {C. E.} and Arnett, {W. D.} and {De Angelis}, {R. J.} and Ding, {X. X.} and Ehmann, {W. D.}",

note = "Funding Information: Pz:tmowtedgment - This work was partially supported by the National Science Foundation (Division of Mechanics, Structures, and Materials Engineering, Grant MSM-8718385).",

year = "1989",

month = mar,

doi = "10.1016/0038-1098(89)90487-0",

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T1 - Starting materials and superconductor stoichiometry

AU - Hamrin, C. E.

AU - Arnett, W. D.

AU - De Angelis, R. J.

AU - Ding, X. X.

AU - Ehmann, W. D.

N1 - Funding Information: Pz:tmowtedgment - This work was partially supported by the National Science Foundation (Division of Mechanics, Structures, and Materials Engineering, Grant MSM-8718385).

PY - 1989/3

Y1 - 1989/3

N2 - Oxygen contents of as-received La2O3 and Nd2O3 were determined by fast neutron activation analysis. X-ray diffraction was used to determine the phases present in these materials. Results of these analyses show that significant amounts of hydroxides (in one case over 90 wt%) were present in all oxide samples. These results carry tremendous implications for the stoichiometry of the superconductor formation reaction and the composition of the final product. The most important conclusion to be drawn from this study is that many of the bulk superconducting ceramics produced to date may be of approximate composition at best.

AB - Oxygen contents of as-received La2O3 and Nd2O3 were determined by fast neutron activation analysis. X-ray diffraction was used to determine the phases present in these materials. Results of these analyses show that significant amounts of hydroxides (in one case over 90 wt%) were present in all oxide samples. These results carry tremendous implications for the stoichiometry of the superconductor formation reaction and the composition of the final product. The most important conclusion to be drawn from this study is that many of the bulk superconducting ceramics produced to date may be of approximate composition at best.

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Starting materials and superconductor stoichiometry

Abstract

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