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X-Ray Study of the BaO-Y2 O3-CuOx System

Published online by Cambridge University Press:  06 March 2019

W. Wong-Ng ,
R. S. Roth ,
F. Beech  and
K. L. Davis
W. Wong-Ng
Affiliation:
Ceramics Division and Reactor Radiation Division National Bureau, of Standards Gaithersburg, Md 20899
R. S. Roth
Affiliation:
Ceramics Division and Reactor Radiation Division National Bureau, of Standards Gaithersburg, Md 20899
F. Beech
Affiliation:
Ceramics Division and Reactor Radiation Division National Bureau, of Standards Gaithersburg, Md 20899
K. L. Davis
Affiliation:
Ceramics Division and Reactor Radiation Division National Bureau, of Standards Gaithersburg, Md 20899
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Abstract

Ten compounds are found in the Ba0-Y203-CuOx system. High temperature (≈950-1000°C) phases identified as Ba4Y2O7 , Ba2Y2O5 , Ba3Y4O9 , BaY2O4 , Y2Cu2O5 , BaCuO2+x, Ba3YCu2OZ BaY2Cu05 and BazYCu306+x are formed in this temperature range. In addition, a new compound with composition of 2BaO:CuO, which possibly has a melting point below 950°C, was prepared at 850°C. A summary o£ the crystallographic data of these 10 phases is given. In particular, results of x-ray studies pertaining to four compounds, BazYCu306+x, which is currently the most promising high To' superconductor material, Ba2Cu03 , BaY2Cu05 , and Ba3YCu20Z are reviewed.

Type
V. X-Ray and Neutron Diffraction Applications Including Superconductors
Information
Advances in X-Ray Analysis , Volume 31: Thirty-Sixth Annual Conference on Applications of X-ray Analysis, August 3-7, 1987 , 1987 , pp. 359 - 370
Copyright
Copyright © International Centre for Diffraction Data 1987

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