Grain orientation and critical current of tape-casted and hot-forged superconducting Bi(Pb)SrCaCuO ceramics

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A preferred grain orientation of high-T c superconducting Bi(Pb)SrCaCuO ceramics with a large anisotropic crystal structure can be given by the tape-casting (TC) and hot-forging (HF) (TC+HF) method. The grain in the TC+HF samples were oriented perpendicular to the c-axis, which lies in a forging direction. The grain orientation factor, F, was estimated by the X-ray diffraction patterns, for example, F = 0.9. The critical current density, Jc[ab] (=840 A / cm 2 ) of the ab-plane was elevated 14 times as large as the Jc[OF] of the unoriented (OF) samples by the TC+HF method.