TY - JOUR
T1 - Effect of Some Additive Oxides on Preparation of Bi1.8 Pb0.4. Sr2.0Ca2.0Cu3.2Oy Superconductor Ceramics
AU - Takada, Jun
AU - Kitaguchi, Hitoshi
AU - Yada, Setsuo
AU - Ohhashi, Kentaro
AU - Naka, Shigeharu
AU - Tomii, Yoichi
AU - Itoh, Hideaki
PY - 1991
Y1 - 1991
N2 - A single phase powder with the composition of Bi1.8Pb0.4Sr2.0Ca2.0Cu3.2Oy was sintered with the small amount of Ag2O or compositional oxides. The bulk density, microstructure and superconductive characteristics of the sintered specimens were examined to investigate the effect of the additive oxides on the sinterability and superconducting properties. The bulk density was of 4.3–4.6g/cm3 for the sintered specimens with 0.05–0.1mol addition. Their resistivity curves were divided into three groups, i.e. (a) without additive, Bi2O3 or PbO, (b) SrO, CaO or CuO and (c) Ag2O. From SEM photographs it was observed that the sintered specimens were composed of the three main layer parts consisting of surface layer, orientated layer, and center layer part with disordered orientation. The thickness of the disordered layers in the center part decreased with decreasing the thickness of the specimens. The excellent result of Jc (77K) was shown by the sintered specimen with 0.1mol addition of SrO.
AB - A single phase powder with the composition of Bi1.8Pb0.4Sr2.0Ca2.0Cu3.2Oy was sintered with the small amount of Ag2O or compositional oxides. The bulk density, microstructure and superconductive characteristics of the sintered specimens were examined to investigate the effect of the additive oxides on the sinterability and superconducting properties. The bulk density was of 4.3–4.6g/cm3 for the sintered specimens with 0.05–0.1mol addition. Their resistivity curves were divided into three groups, i.e. (a) without additive, Bi2O3 or PbO, (b) SrO, CaO or CuO and (c) Ag2O. From SEM photographs it was observed that the sintered specimens were composed of the three main layer parts consisting of surface layer, orientated layer, and center layer part with disordered orientation. The thickness of the disordered layers in the center part decreased with decreasing the thickness of the specimens. The excellent result of Jc (77K) was shown by the sintered specimen with 0.1mol addition of SrO.
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U2 - 10.2497/jjspm.38.287
DO - 10.2497/jjspm.38.287
M3 - Article
AN - SCOPUS:0026107190
SN - 0532-8799
VL - 38
SP - 287
EP - 290
JO - Journal of the Japan Society of Powder and Powder Metallurgy
JF - Journal of the Japan Society of Powder and Powder Metallurgy
IS - 2
ER -