ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The phase relations within the system Tl2O3–BaO–CaO–CuO including Ag have been studied with emphasis on the high-temperature superconducting phases TlBa2Ca2Cu3O8.5 (1223 phase), Tl2Ba2Ca2Cu3O10 (2223 phase), TlBa2CaCu2O6.5 (1212 phase), and Tl2Ba2CaCu2O8 (2212 phase) at 890°C in an oxygen atmosphere. 1223 has been found to be in equilibrium with a liquid phase that is Tl poor. 2223 and 2212 exhibit varying Tl/(Ba + Ca) ratios. The three-phase field 1223 + 2223 + 2212 has been identified. The results of this study emphasize that multiphase samples can be prepared which consist of three superconducting phases, each exhibiting a critical temperature of 100 K or above.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.2001.tb00628.x
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