Abstract
The influence of texturation on the intragranular properties of bismuth cuprates was studied after partial substitution of calcium by tetravalent cerium in the 2212 ceramics (Bi 2 Sr 2 Ca 1− x Ce x Cu 2 O 8 + δ ; x ≤ 0.3). The critical temperature T c varies non-monotonically and reaches a maximum for x ∼ 0.02. The relative superconducting volume decreases due to the electrons supplied by the lanthanide. X-ray diffraction, SEM observations, ac susceptibility and magnetization show that these ceramics become easily textured by their simple compaction prior to sintering . It was found that the texturation mainly affects the intragranular properties and the initial slope of the magnetization cycles.
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