Synthesis, characterization, and Vickers microhardness for (YIG)x/(Bi,Pb)-2223 superconducting phase

Makdah, Marwa H. El; Ghouch, Nour El; El-Dakdouki, Mohammad H.; Awad, R.; Matar, M.

doi:10.1016/j.ceramint.2023.04.070

Cited by 5 publications

(1 citation statement)

References 171 publications

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“…The findings indicated that both the level of calcium impurity addition amount and the applied test force triggered the induction of microvoids, strains, prevalent defects, stresses, bonding problems, and crystallinity faults based on interaction between adjacent layers of ceramics [20]. Consequently, mechanical performances and the stabilization of the durable tetragonal phase, as well as the overall stability of the bulk Bi-2212 superconducting system, cannot withstand the presence of calcium oxide impurity in the Bi-2212 crystal structure.…”

Section: Role Of Calcium Oxide Impurity In Elastic Modulus For Bi-221...mentioning

confidence: 99%

Dependence of General Mechanical Properties of Bi-2212 Ceramics on Calcium Oxide

2023

International Conference on Innovative Academic Studies

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In this study, we investigated the role of calcium oxide (CaO) impurity addition and applied micro-indentation test loads on some mechanical performance parameters including elastic moduli (E), shear (G) modulus and resilience (Ur) of Bi2.1Sr2.0Ca1.1Cu2.0Oy ceramics using Vickers hardness test measurements. The tests were conducted in test forces ranges from 0.245 N to 2.940 N. Additionally, experimental findings reveal the relationship between Vickers results and test forces applied, and specifically identify the impact of Ca ion impurity on the elastic modulus for Bi-2212 ceramics. All experimental findings indicated a strong dependence of the examined mechanical performance quantities on both the loads applied and the amount of calcium oxide impurity addition. As the level of calcium impurity addition increased in bulk Bi-2212 ceramic compounds, it was noted that mechanical performances are systematically deteriorated due to an increase in microvoids, strains, prevalent defects, bonding problems, and crystallinity faults based on interaction between adjacent layers of ceramics. Furthermore, increasing the applied test force damaged the mechanical performances of Bi-2212 ceramics due to their granular structure. Thus, it was indicated that the pure sample has the best crystal quality while the Bi-2212 ceramic prepared with the maximum CaO addition amount of x=0.1 has the maximum crystal structure problems. In this regard, the former ceramic exhibited much stronger mechanical performance quantities compared to the other prepared ceramics. In other words, the pure ceramic material showed the least response and sensitivity to the microindentation test load. In summary, the idea of adding calcium oxide impurity fails to improve the mechanical performance, durability of the tetragonal phase, and stabilization of the Bi-2212 superconducting system.

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Section: Role Of Calcium Oxide Impurity In Elastic Modulus For Bi-221...mentioning

confidence: 99%

Dependence of General Mechanical Properties of Bi-2212 Ceramics on Calcium Oxide

2023

International Conference on Innovative Academic Studies

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Physical properties of the (Tl, Hg)-1223 superconductor phase substituted by lanthanum and samarium fluorides

Khattar,

Habanjar,

Awad

et al. 2024

Appl. Phys. A

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Excess conductivity and magnetoresistance analysis for (BSF)x/(Bi, Pb)-2223 composite

Matar,

Mohamed,

Abou-Aly

et al. 2024

Appl. Phys. A

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This study examined the impact of adding hard ferrite Ba0.5Sr0.5Fe12O19 (BSF) nanoparticles to the Bi1.8Pb0.4Sr2Ca2Cu3.2O10+δ (Bi, Pb)-2223) superconductor phase. The investigation specifically focused on evaluating the critical current density, fluctuation-induced conductivity, and magnetoresistance of nano-(BSF)x/(Bi, Pb)-2223 composite, where 0.00 ≤ x ≤ 0.20 wt.%. The results revealed that the critical current density, Jc, increased with the addition of nano-(BSF) up to x = 0.04 wt.%, reaching a value of 441.20 A/cm2. The Aslamazov and Larkin (A–L) approach has been evaluated the fluctuation-induced conductivity. Several superconducting parameters, including coherence length ζc(0), effective layer thickness d, penetration depth λpd(0), and Fermi energy $${E}_{F}$$ E F showed improvement as the concentration of nano-(BSF) increased up to x = 0.04 wt.%. In addition to Ginzburg–Landau critical parameters, such as the thermodynamic critical field Bc(0), lower critical magnetic field Bc1(0), upper critical magnetic field Bc2(0), and critical current density Jc(0) demonstrated an increase up to x = 0.04 wt.%, followed by a decrease for higher concentrations. The magnetoresistance measurements were performed at various applied DC magnetic fields, with values ranging from 0.29 to 4.44 kG, and were analyzed using the thermally activated flux creep (TAFC) and Ambegaokar–Halperin (AH) models. The calculated flux pinning energy (U) increased with the addition of nano-(BSF) up to x = 0.04 wt.% and then decreased for x > 0.04 wt.%. Furthermore, the transition width (ΔT), was observed to increase as the applied magnetic field values increased. Moreover, the addition of nano-(BSF) increased the field-independent critical current density, Jc,0(0), up to x = 0.04 wt.%, after which it decreased for higher concentrations.

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Synthesis, characterization, and Vickers microhardness for (YIG)x/(Bi,Pb)-2223 superconducting phase

Cited by 5 publications

References 171 publications

Dependence of General Mechanical Properties of Bi-2212 Ceramics on Calcium Oxide

Dependence of General Mechanical Properties of Bi-2212 Ceramics on Calcium Oxide

Physical properties of the (Tl, Hg)-1223 superconductor phase substituted by lanthanum and samarium fluorides

Excess conductivity and magnetoresistance analysis for (BSF)x/(Bi, Pb)-2223 composite

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