Structural, thermal and superconducting properties of Ag2O-doped YBa2Cu3O7-x composite materials

Harabor, A.; Rotaru, P.; Harabor, N. A.; Nozar, P.; Rotaru, Andrei

doi:10.1016/j.ceramint.2022.08.100

Cited by 12 publications

(5 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the SDs prepared by lyophilization, two new broad endothermic peaks were observed, which could have resulted from the melting of sodium carbonate and sodium bicarbonate components within the buffer system. The literature indicates that the melting points are approximately 96 • C and 160 • C for these species, respectively [50,51]. Interestingly, both MW-and LP-SDs demonstrated a disappearance of the LZP melting endotherm.…”

Section: Discussionmentioning

confidence: 92%

Development of a Multifunctional Oral Dosage Form via Integration of Solid Dispersion Technology with a Black Seed Oil-Based Self-Nanoemulsifying Drug Delivery System

Sherif,

Shahba

2023

Biomedicines

View full text Add to dashboard Cite

Lansoprazole (LZP) is used to treat acid-related gastrointestinal disorders; however, its low aqueous solubility limits its oral absorption. Black seed oil (BSO) has gastroprotective effects, making it a promising addition to gastric treatment regimens. The present study aims to develop a stable multifunctional formulation integrating solid dispersion (SD) technology with a bioactive self-nanoemulsifying drug delivery system (SNEDDS) based on BSO to synergistically enhance LZP delivery and therapeutic effects. The LZP-loaded SNEDDS was prepared using BSO, Transcutol P, and Kolliphor EL. SDs were produced by microwave irradiation and lyophilization using different polymers. The formulations were characterized by particle apparent hydrodynamic radius analysis, zeta potential, SEM, DSC, PXRD, and in vitro dissolution testing. Their chemical and physical stability under accelerated conditions was also examined. Physicochemical characterization revealed that the dispersed systems were in the nanosize range (<500 nm). DSC and PXRD studies revealed that lyophilization more potently disrupted LZP crystallinity versus microwave heating. The SNEDDS effectively solubilized LZP but degraded completely within 1 day. Lyophilized SDs with Pluronic F-127 demonstrated the highest LZP dissolution efficiency (3.5-fold vs. drug) and maintained chemical stability (>97%) for 1 month. SDs combined with the SNEDDS had variable effects suggesting that the synergistic benefits were dependent on the formulation and preparation method. Lyophilized LZP-Pluronic F127 SD enabled effective and stable LZP delivery alongside the bioactive effects of the BSO-based SNEDDS. This multifunctional system is a promising candidate with the potential for optimized gastrointestinal delivery of LZP and bioactive components.

show abstract

Section: Discussionmentioning

confidence: 92%

Development of a Multifunctional Oral Dosage Form via Integration of Solid Dispersion Technology with a Black Seed Oil-Based Self-Nanoemulsifying Drug Delivery System

Sherif,

Shahba

2023

Biomedicines

View full text Add to dashboard Cite

show abstract

“…Unlike LCF #1, LCF #3 has multiple sharp peaks from 30° to 40°. The sharp peaks at 32°, 35° and 40° can be respectively assigned to (202), (120) and (441) crystallographic planes of hydrated sodium carbonates [32] . Figure 2(b and c) exhibits N 2 adsorption/desorption isotherms and pore size distribution respectively.…”

Section: Resultsmentioning

confidence: 98%

“…The sharp peaks at 32°, 35°and 40°can be respectively assigned to (202), ( 120) and (441) crystallographic planes of hydrated sodium carbonates. [32] Figure 2(b and c) exhibits N 2 adsorption/desorption isotherms and pore size distribution respectively. The pore size distribution in LCF #1 is majorly confined within the range of 2.7-4 nm, suggesting the limited presence of micropores, whereas LCF #3 consists of a more board pore distribution from 2.5 to 10 nm.…”

Section: Resultsmentioning

confidence: 99%

Sodium‐Dictated Free‐Standing Lignin‐Carbon Electrode towards Ultrahigh Capacitance

Neupane,

Yan,

et al. 2023

Batteries & Supercaps

View full text Add to dashboard Cite

Lignin is a waste product in the paper industry and lignocellulosic biorefineries, in addition to being the second most abundant renewable biopolymer on Earth. Valorization of useless lignin into high value‐added advanced materials not only helps address the environmentally detrimental biowaste but also satisfies the societal need for energy. While lignin has been converted into porous carbon, made into slurry, and pasted onto metal forms as an electrode for lithium‐ion batteries and supercapacitors, there remains issues with how to scale up the process while achieving great area and mass capacitances in the fabricated lignin‐carbon electrodes. In this work, a thick freestanding electrode coupled by lignin carbon and sodium without any binder and additives was fabricated demonstrating a specific area capacitance of 19.7 F cm−2 at a current density of 1 mA cm−2, which is the highest among to date reported freestanding lignin carbon electrodes with similar thickness. This excellent electrochemical performance originates from high electro‐positivity and oxygen content promoted by the sodium. This work brings a new strategy towards lignin utilization and energy storage through coupling lignin carbon and alkali metals.

show abstract

“…In this context, we have discussed only the experimental test results (Figure 6) for the samples produced at the oxygen ambient conditions. It has been seen that all the YBa 2 Cu 3 O 7‐y Mn x superconductors have been found to crystallize in the orthorhombic crystal structure with P 4/mmm space group in a few distortions (Harabor et al, 2023). With the increase in the Mn 2 O 3 impurity amount up to the level of x = 0.07, the orthorhombic crystal system has been noted to develop systematically.…”

Section: Resultsmentioning

confidence: 99%

“…On the contrary, the presence of oxygen and optimum Mn 2 O 3 impurity in the main matrix has positively affected only Ψ 0 part of the pair wave function depending on the increase in the thermodynamically activated super-electrons (Dynes et al, 1986;Graybeal & Beasley, 1984). Cu 3 O 7-y Mn x superconductors have been found to crystallize in the orthorhombic crystal structure with P 4/mmm space group in a few distortions (Harabor et al, 2023). With the increase in the Mn 2 O 3 impurity amount up to the level of x = 0.07, the orthorhombic crystal system has been noted to develop systematically.…”

Section: Samplesmentioning

confidence: 99%

Support of polaronic states and charge carrier concentrations of YBa₂Cu₃O₇_‐y ceramics by oxygen and Mn₂O₃ impurity

Kurtul,

Yildirim,

Turgay

et al. 2024

Microscopy Res & Technique

View full text Add to dashboard Cite

The influence of oxygen and Mn2O3 impurity addition intervals 0.01 ≤ x ≤ 0.30 on the basic electrical conductivity, stabilization, crystallinity quality, grain boundary couplings, structural, orbital hybridization mechanisms, and superconducting properties of YBa2Cu3O7‐yMnx ceramics has extensively been analyzed by electrical resistivity, X‐ray diffraction investigations, and related theoretical results. It has been found that there is a strong link between the production conditions and fundamental characteristic features. All the results deduced have enabled us to discuss the variation of electron–electron and electron–phonon interactions, order parameter for super‐electrons and cooper‐pairs, organization of Cu–O coordination, homogeneities of oxidation states, microscopic structural problems, electronic density states, and grain boundary couplings between the adjacent layers in the YBa2Cu3O7‐y ceramics. Similarly, we have discussed the change in the formation of pairing mechanisms and bipolarons in the polarizable lattices in the microdomain clusters. The results have shown that both the presence of oxygen and optimum manganese impurity of x = 0.07 led to the enhancement in the fundamental characteristic features related to the basic physical, quantum mechanical, and thermodynamics features. Thus, the material produced at the most ideal conditions has exhibited the best orthorhombic crystal structure with the distortion degree of 6.419 × 10−3, paring mechanism, and crystallinity quality due to the development of orthorhombicity and oxygen ordering degree. Namely, the addition of optimum manganese impurity has organized the Cu–O coordination and stabilized the crystal structure as much as possible. Numerically, the sample prepared with x = 0.07 Mn ions has displayed the largest crystallite size, c‐axis length, residual resistivity ratio, onset, and offset critical temperatures of 10.977, 11.723 Å, 73 nm, 98.320 K, and 100.504 K, respectively. Conversely, the same material has demonstrated the smallest oxygen ordering degree of 6.714, strain of 44.015 × 10−3, and a‐ and b‐axis lengths of 3.792 and 3.841 Å. On the other hand, the oxygen‐free annealing condition and excess manganese impurity have completely damaged the whole mechanism because of the phase transition from orthorhombic to tetragonal (structural O–T transition) crystal structure. To sum up, the oxygen and optimum manganese impurity have encouraged the YBa2Cu3O7‐y superconductors to use in much more application fields.Research Highlights The presence of oxygen and an optimal level of Mn2O3 impurity in YBa2Cu3O7‐y superconductors improved superconducting properties. The optimal level of Mn2O3 impurity promotes standard metallic characteristics. Ideal process conditions lead to the formation of super‐electrons and cooper‐pairs, expanding the superconducting energy gap. Optimal conditions lead to the expansion of orthorhombic distortion symmetry and average crystallite size. The excess manganese impurity results in a metal‐to‐insulator transition.

show abstract

Structural, thermal and superconducting properties of Ag2O-doped YBa2Cu3O7-x composite materials

Cited by 12 publications

References 93 publications

Development of a Multifunctional Oral Dosage Form via Integration of Solid Dispersion Technology with a Black Seed Oil-Based Self-Nanoemulsifying Drug Delivery System

Development of a Multifunctional Oral Dosage Form via Integration of Solid Dispersion Technology with a Black Seed Oil-Based Self-Nanoemulsifying Drug Delivery System

Sodium‐Dictated Free‐Standing Lignin‐Carbon Electrode towards Ultrahigh Capacitance

Support of polaronic states and charge carrier concentrations of YBa₂Cu₃O₇_‐y ceramics by oxygen and Mn₂O₃ impurity

Contact Info

Product

Resources

About

Structural, thermal and superconducting properties of Ag2O-doped YBa2Cu3O7-x composite materials

Cited by 12 publications

References 93 publications

Development of a Multifunctional Oral Dosage Form via Integration of Solid Dispersion Technology with a Black Seed Oil-Based Self-Nanoemulsifying Drug Delivery System

Development of a Multifunctional Oral Dosage Form via Integration of Solid Dispersion Technology with a Black Seed Oil-Based Self-Nanoemulsifying Drug Delivery System

Sodium‐Dictated Free‐Standing Lignin‐Carbon Electrode towards Ultrahigh Capacitance

Support of polaronic states and charge carrier concentrations of YBa2Cu3O7‐y ceramics by oxygen and Mn2O3 impurity

Contact Info

Product

Resources

About

Support of polaronic states and charge carrier concentrations of YBa₂Cu₃O₇_‐y ceramics by oxygen and Mn₂O₃ impurity