Abstract
The samples of the general formula (Bi
0.8Pb
0.2+
x
)
2Sr
2Ca
2Cu
3O
10, where 0.0≤
x≤0.3 mol% were prepared by the conventional high temperature solid state reaction technique. The extra lead (
x) was added as very fine powder of pure Pb-metal with particle size ≤50 μm. The superconducting measurements for HTc-2223-phase proved that, best
T
c=109 K is for the sample with
x=0.2 (Pb-content=0.4 mol%) while the lowest
T
c=98 K is for the sample with
x=0.3 mol%. The evaluated crystalline lattice structure of the prepared samples mainly belongs to the superconductive tetragonal phase (2223), besides secondary (2201) and (2212) phases in minor. The
c-axis lattice parameter exhibits length elongation as
x (Pb-content) increases from
x=0.1 to 0.3. The maximum mechanical tensile strength values at 295 K were promoted and found to be 37.5, 38.6 and 41.4 MPa as Pb-content increases from
x=0.1 to 0.3, respectively.