Domains of existence and physical properties of the 2201- and 2202-type structure phases in the Bi2O3-SrO-CaO-CuO quaternary system

1 July 1990

journal article
Published by IOP Publishing in Superconductor Science and Technology

Vol. 3 (7) , 356-362
https://doi.org/10.1088/0953-2048/3/7/005

Abstract

The domains of existence of the 2201- and 2202-type structures in solid solutions of the Bi₂O₃-SrO-CaO-CuO quaternary system are investigated from the powder X-ray diffraction, density and resistive transition measurements. It is shown that the general formula of Torardi (1988) should not be identified as describing fixed stoichiometry of Bi-based compounds but as a code according to which the unit cells are to be constructed. The authors have also shown that the composition of the investigated phases can vary within some region of homogeneity. The 2201-type structure acts as a matrix for the formulation of new phases by addition of some quantities of calcium and copper, which are known as 80 K and 110 K superconductors. The influence of oxygen on the properties of Bi-based compounds is also evaluated.

Keywords

This publication has 12 references indexed in Scilit:

Phase relations in the Bi2O3-SrO-CuO system at 800 degrees C
Superconductor Science and Technology, 1990
Constitution of Bi2(Sr1-xCax)2Cu2Oyand of Bi8(Sr1-xCax)8Ca4Cu10Oytype solid solutions
Superconductor Science and Technology, 1990
110 k superconductivity in crystallized Bi-Sr-Ca-Cu-O glasses
Physica C: Superconductivity and its Applications, 1988
The influence of oxygen on the physical properties of the superconducting series Bi2.1(CaχSr1−χ)n+1Cun+4+δ
Physica C: Superconductivity and its Applications, 1988
Structures of the superconducting oxides ${Tl}_{2}$ ${Ba}_{2}$ Cu $O_{6}$ and ${Bi}_{2}$ ${Sr}_{2}$ Cu $O_{6}$
Physical Review B, 1988
Cross sections for electron-impact single ionization of ${Kr}^{8 +}$ and ${Xe}^{8 +}$
Physical Review A, 1988
Synthesis, conductivity, and X-ray photoelectron spectrum of Bi2Sr2CuO7+X. A new ternary bismuth-oxide system exhibiting metallic conductivity
Solid State Communications, 1988
Crystal substructure and physical properties of the superconducting phase ${Bi}_{4} {(S r, C a)}_{6} {Cu}_{4} O_{16 + x}$
Physical Review B, 1988
Electron microscopy on the Tc = 110 K (midpoint) phase in the system Bi2O3–SrO–CaO–CuO
Nature, 1988
Superconductivity in the Bi - Sr - Cu - O system
Zeitschrift für Physik B Condensed Matter, 1987