Transition range viscosity of rapidly quenched Bi-Ca-Sr-Cu-O glasses

Tatsumisago, M.; Angell, C. A.; Tsuboi, S.; Akamatsu, Y.; Tohge, N.; Minami, T.
May 1989
Applied Physics Letters;5/29/1989, Vol. 54 Issue 22, p2268
Academic Journal
As a precursor of high Tc superconductors, glasses in the system BixCaSrCu2Ow (x=1.5,2.7) have been prepared using twin-roller and metal-plate quenching procedures. Transition range viscosities have been measured on samples as thin as 0.02 mm using the beam-bending method with a technical modification. From the viscosity data, the system Bi-Ca-Sr-Cu-O can be characterized as a ‘‘fragile’’ liquid like the ZrF4-based fluorides. The possibility of drawing fibers of high Tc superconductor precursors is discussed on the basis of the temperature dependence of viscosity.


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