Comparative Study of Structural, Electrical, and Mechanical Properties of (Tl, Hg)-1223 High Temperature Superconducting Phase Substituted by Lead Oxide and Lead Dioxide

Khattar, Rola F.; Habanjar, Khulud; Awad, R.; Anas, M.

doi:10.1007/s10909-023-02968-0

Cited by 4 publications

(4 citation statements)

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“…The scanning electron microscope (SEM) micrographs of Tl 0.8 Hg 0.2 Ba 2 Ca 2−x Sm x Cu 3 O 9−δ−y F y and Tl 0.8 Hg 0.2 Ba 2 Ca 2−x La x Cu 3 O 9−δ−y F y , with x = 0.00, 0.025, and 0.10, are depicted in Figure 4. The presence of rectangular plates in the sample's structure indicates the formation of the (Tl, Hg)-1223 phase, as indicated by previous studies [12,20]. It is worth noting that the rectangular form remains stable as the substitute content increases.…”

Section: Sample Investigationsupporting

confidence: 63%

“…Previous research has demonstrated that both chemical addition and substitution may be used to improve the mechanical characteristics of such materials [17][18][19][20]. Mohammed et al [17] conducted comparative research on the impact of nano-SnO 2 and nano-In 2 O 3 addition on (CuTl-1223) superconductors.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicated that the optimal T c value was achieved for x = 1.0, where T c recorded 139 K. Furthermore, increasing Ni concentration strengthens the interlayer bonding as seen by the increase in H V , elastic modulus (E), and yield strength (Y) values. Khattar et al [20] used PbO and PbO 2 to compare the influence of Pb substitution at the thallium site of the Tl 0.8-x Hg 0.2 Pb x Ba 2 Ca 2 Cu 3 O 9−δ superconductor phase. The result showed that both forms of lead ion substitution increased the formation of the (Tl, Hg)-1223 superconducting phase.…”

Section: Introductionmentioning

confidence: 99%

“…However, at lower applied loads, the PSR Model exhibits minimal divergence compared to other models ( 2%). This conclusion might be attributed to the low needed minimum applied load α2 values as a result of the flawless finishing of all manufactured samples [20]. The PSR model is applicable to both phases.…”

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confidence: 99%

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Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides

Khattar,

Anas,

Awad

et al. 2023

Condensed Matter

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This study investigated the impact of samarium and lanthanum fluorides (SmF3 and LaF3) on the physical and mechanical properties of Tl0.8Hg0.2Ba2Ca2−xRxCu3O9−δ−yFy superconducting phases (specifically the (Tl, Hg)-1223 phase), where R = Sm and La, with 0.00 ≤ x ≤ 0.10. The superconducting samples were synthesized using the solid-state reaction method. X-ray diffraction (XRD) verified the formation of the (Tl, Hg)-1223 phase without altering its tetragonal structure. Scanning electron micrographs (SEM) reveal the improvement of the grain size and inter-grain connectivity as Sm and La contents increased up to x=0.025. The electrical properties of (Tl, Hg)-1223 were studied using I-V and electrical resistivity measurements. Improved superconducting transition temperature (Tc) and transport critical current density (Jc) were observed up to x=0.025, beyond which they decreased substantially. Vickers microhardness (Hv) measurements were performed at room temperature to investigate their mechanical performance with various applied loads (0.49–9.80 N) and times (10–90 s). For both substitutions, the mechanical properties were enhanced up to an optimal value at x=0.025. All samples exhibited normal indentation size effect (ISE) behavior. The proportional sample resistance (PSR) model best explained Hv values among five theoretical models. Dislocation creep was the primary creep mechanism in the samples, according to indentation creep studies.

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Section: Sample Investigationsupporting

confidence: 63%