Manufacturing Industry
PROCESSING - CURRENT DENSITIES REACH PRACTICAL VALUES
Advanced Ceramics Report, February, 1990
Australian scientists claim they can routinely make bulk high temperature superconductors with current densities large enough for practical applications.
Using their patented process, Dou Shixue and his team, from the University of New South Wales, Sydney, also form the material into wires and tapes, showing they have gone a long way towards solving the problems associated with the brittleness of these ceramics, they say.
According to the materials scientists, the bulk bismuth lead strontium calcium copper oxide superconductor has a critical current density of more than 12 000 A.cm-2. The team also claims to have made four coils of tape, each about 1 m long, with current densities of about 2000 A.cm-2.
Shixue admits that US scientists have reported...
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