Abstract
In a freeze-dried nitrate precursor powder with cation composition Bi:Pb:Sr:Ca:Cu = 1.7:0.3:2.0:2.5:3.5, Sc2O3 was added. The stoichiometry for the mixed precursor powder was Bi:Pb:Sr:Sc:Ca:Cu = 1.7:0.3:2.0:0.25:2.5:3.5. The two nitrate precursor powders with and without Sc were thermally decomposed, pressed, and sintered in the same conditions. They show different behavior, as revealed by thermal analysis, X-ray diffraction (XRD), Scanning electron microscopy (SEM), and χ′(T) measurements. Addition of Sc slows down synthesis processes, including 2223-phase during reactive sintering. After 70 h of sintering, 43% of 2223-phase formed in the pellet with Sc, whereas in the Sc-free pellet, 51% of the 2223-phase was attained. Moreover, addition of Sc leads to a certain morphology, resulting in lower superconducting characteristics.
Similar content being viewed by others
REFERENCES
T. Kanai, T. Kamo, S. Matsuda, Jap. J. Appl. Phys. 28(4), L551 (1989).
V. Fruth, M. Zaharescu, G. Aldica, Appl. Supercond. 1(3–6), 693 (1993).
P. Badica, G. Aldica, S. Mandache, Supercond. Sci. Technol. 12, 162 (1999).
Li Yan-rong, Li You-mo, Hong Guang-yan, Physica C 176, 477 (1991).
T. Komatsu, M. Ueta, T. Ohki, R. Sato, K. Matusita, J. Am. Ceram. Soc. 75, 1864 (1992).
S. A. Agnihotry, P. Ghosal, K. C. Nagpal, S. Chandra, Supercond. Sci. Technol. 4, 7 (1991).
H. Liu, W. Zhang, L. Zhou, Z. Mao, B. Li, M. Yan, L. Cao, Z. Chen, Y. Ruan, D. Peng, Y. Zhang, Physica C 159, 665 (1989).
Yo. Li, Ya. Ling, G. Hong, X. Li, B. Yang, J. P. Chaminade, P. Dordor, E. Marquestaut, J. Etourneau, J. Supercond. 9(3), 201 (1996).
R. K. Nkum, W. R. Datars, Physica C 190, 465 (1992).
G. Aldica, A. F. Alexeev, P. Badica, T. Y. Gridasova, V. V. Morozov, Electronnoe Stroenie i Svoistva Tugoplavkih Soedinenii i Metallov 1995 (Kiev: Institut Problem Materialovedeniya ‘I. N. Frantzevich) (in Russian) p. 95.
Y. L. Chen, R. Stevens, J. Am. Ceram. Soc. 75(5), 1142 (1992).
M.-C. Bunescu, G. Aldica, P. Badica, F. Vasiliu, P. Nita, S. Mandache, Physica C 281, 191 (1997).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Badica, P., Aldica, G. & Mandache, S. Sc Addition to (Bi,Pb)2Sr2Ca2Cu3Ox Freeze-Dried Ceramic. Journal of Superconductivity 13, 529–533 (2000). https://doi.org/10.1023/A:1007812615073
Issue Date:
DOI: https://doi.org/10.1023/A:1007812615073