TITLE:
Investigating the Preparation Conditions on Superconducting Properties of Bi2-x LixPb0.3Sr2Ca2Cu3O10+δ
AUTHORS:
Muna Musa Abbas, Saad Frhan Oboudi, Nadein Qahtan Raoof
KEYWORDS:
Bi-2223 Superconductor, Li Substitution, Sintering Temperature, Multi-Step Methods
JOURNAL NAME:
Materials Sciences and Applications,
Vol.6 No.4,
April
8,
2015
ABSTRACT: One and multi-step solid state reaction methods were used to prepare a high temperature superconductor
with a nominal compositionBi2-x LixPb0.3Sr2Ca2Cu3O10+δ for ( 0 ≤ x ≤ 0 .5). T he effect o f
preparation conditions and substituting Li on Bi sites had been investigated by the use of X-ray
diffraction, resistance measurements and oxygen content to obtain the optimum conditions for
formation and stabilization of the 2223-phase. It has been found that intermediate grinding will
force to convert and accelerate the formation rate of the 2223-phase. The morphological analyses
were carried out by SEM. The results showed that the multi-step technique was appropriate to
prepare the compositio Bi2-x LixPb0.3Sr2Ca2Cu3O10+δ . X-ray diffraction analysis showed two phases:
high-TC phase 2223 and low-TC phase 2212 with orthorhombic structure for all samples. However,
the optimum concentration was found for 0.3 which improved the microstructure and had the
highest TC value 130 K for the highest value of oxygen content.