CH1012
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11
CERAMICS III.h
Superconducting Ceramics
show the unusual property of
having virtually zero resistance
at the relatively high Tc of > 77K.
(Tc = superconducting transition T)
show the unusual property of
having virtually zero resistance
at the relatively high Tc of > 77K.
(Tc = superconducting transition T)
• The YBa2Cu3O7 structure (95K)
shown has Cu chains where Cu
has the oxidation state of 2.33.
shown has Cu chains where Cu
has the oxidation state of 2.33.
• The cost of He(l) is $20/L (<77K)
whereas N2(l) is $1 (>77K). This
means there is much scope for
using high-Tc ceramics in power transmission.
whereas N2(l) is $1 (>77K). This
means there is much scope for
using high-Tc ceramics in power transmission.
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