ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The influence of a multistep intermediate pressing and sintering process on microstructure and the relation between microstructure and values of critical current density, J c, in Bi, Pb-Sr-Ca-Cu-O high-T c polycrystalline superconductors was studied. The J c values increased with increasing number of pressing and sintering steps, n, only up to a certain value of n. The increase of J c was reached by improvement of connections between grains due to compacting and by the alignment of superconducting grains in the c-axis direction. The maximal value of J c was found for n = 5. The crack development is responsible for decreasing J c for a higher number of steps.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00351873
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