ISSN:
1572-9605
Keywords:
Thallium Superconductors
;
Phase Diagram
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract The pathway for the formation of the thallium-based TlBa2Ca2Cu3O9 superconductor has been studied by X-ray Diffraction and a-c Susceptibility for samples prepared either by solid-state reaction in air of elemental or mixed oxides or oxidation in oxygen flowing of the metallic TlBa2Ca2Cu3 alloy at temperatures determined by DTA. It is shown that independent on the used procedure, the reaction path implies the double-layer Tl-O series, Tl2Ba2CuO6 and Tl2Ba2CaCu2O8 at the temperature of 800°C and Tl2Ba2Ca2Cu3O10 at 875°C. The Tl-1223 phase is formed for temperatures higher than 905°C. This path-way is understood on the basis of phase equilibrium diagram.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022602517307
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