Possibility of the Higher Critical Temperature on MgB2 Superconductor Synthesized by Powder-In-Sealed-Tube Method

Imaduddin, Agung; Yudanto, Sigit Dwi; Rasyadi, Muhammad Emir Hanif; Nakanishi, Y.; Yoshizawa, Michito

doi:10.1007/s10909-019-02184-9

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…The HTS material mainly includes MgB 2 , BSCCO (Bismuth Strontium Calcium Copper Oxide, such as Bi-2212 and Bi-2223), REBCO (Rare Earth Barium Copper Oxide), and so on. The critical temperature of MgB 2 is around 39 K[69], which is a little lower than other HTS materials. Bi-2212 (Bi 2 Sr 2 CaCu 2 O 8 )[70] is an isotropic HTS material of circular structures, with a critical temperature of around 85 K and a high critical magnetic field.…”

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confidence: 83%

Advancements and Challenges in Power Cable Laying

Li,

Jiang,

Xie

et al. 2024

Energies

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The laying of power cables is a crucial aspect of developing and maintaining modern electrical infrastructure, which is vital for transmitting electricity reliably and efficiently. This review discusses the challenges and advancements in cable laying technologies, emphasizing the critical role of these techniques in meeting the increasing demands for power transmission in the backdrop of the global shift to renewable energy. Three main traditional cable laying methods are explored, including underground, overhead, and submarine, each suited to specific environmental and operational conditions. Then, the cable faults due to the impropriate laying process are discussed. Subsequently, the challenges and advancements encountered in cable laying processes are investigated, especially the difficulties of the cable laying of underground cable, submarine cable, and high-temperature superconductivity cable. This review also considers the impact of technological innovations on improving efficiency in cable laying processes, highlighting the advances driven by digitalization and automation.

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confidence: 83%

Advancements and Challenges in Power Cable Laying

Li,

Jiang,

Xie

et al. 2024

Energies

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“…All samples were heated for 1 h with heating rate 5°C•min -1 and left in the furnace to room temperature. The heating process used in this work is somewhat similar to that of our previous work which adopted from Kumar et al [12,14,17].…”

Section: Experimental 21 Cnts Added Mgb2 Preparationmentioning

confidence: 98%

Influence of CNTs addition on structural and superconducting properties of mechanically alloyed MgB<sub>2</sub>

et al. 2020

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The result of adding carbon nanotubes (CNTs) to the lattice parameters, critical temperature and electrical resistivity of the MgB2 superconductors is reported. Structurally, the addition of CNTs was found to decrease the a-lattice from 3.086 Ã… of CNTs free sample to 3.078 Ã… and 3.074 Ã… of 5% and 10% CNTs added samples due to a substitution of C at the B site which presence in the form of Mg(B1-xCx)2 main phase. The doping level x of CNTs added samples were 2.25 at% and 3.75 at% respectively. The unreacted CNTs presence as the second phase and further acting as the suppression agent for crystallite growth. The addition of CNTs is also to refine the grain size and improves the grain connectivity. Samples show a metallic behavior which observed only at temperatures above ~41 K, below which, a sharp transition of resistivity occurred toward zero resistivity, confirming the superconductivity behavior. This study concluded that the effect of CNTs addition affects the structural parameters and superconducting properties. The addition of the CNTs to 5% and 10% has changed the zero critical temperature of the sample material to respectively 39.20 and 38.02 K from 39.31 K of CNTs free sample.

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“…The PIST method is more efficient because it does not require any vacuumed or inert gas during the sintering process [14][15][16][17]. A stainless steel tube (SS316) is used in the PIST method which is more reliable than the use of Nb/Ta, Ni tubes.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Our previous work reveals the sintering effect at 800°C at the different compositions of Mg in MgB2 bulk composites. [14] The sintering temperature improves the Mg-B reaction which enhances the superconducting properties. To analyze the sintering effect, we sintered the bulk and wire at 700°C, 800°C, and 900°C.…”

Section: Introductionmentioning

confidence: 99%

Study on the Sintering and Mg Composition Effect on MgB<sub>2</sub> Superconducting Bulks and Wires Synthesized by Powder-in-Sealed-Tube Method

Khan

Imaduddin

Nugraha

et al. 2021

AMR

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Numerous research efforts aimed at the MgB2 (Magnesium diboride) as a superconducting material due to its higher critical temperature than Nb-based superconductors such as NbTi, Nb3Sn. Nowadays MgB2 is becoming more popular as the candidate to be applied on medical devices and large-scale applications because of its full coherence lengths, improved critical current density and fields, and simple crystal structure. In this study, we fabricated the 4 mm MgB2 superconducting wires by mixing stoichiometric mole ratio of Mg: B with 1.0:2.0 and 1.1:2.0 through the Powder-In-Sealed-Tube (PIST) method to optimize high critical temperature (TC) than the conventional MgB2 bulk and wire. Furthermore, we decreased the diameter of 4 mm to 1.8 mm wire and analyze the effect of critical temperature. The specimens were sintered at a different temperature to investigate the sintering effect of MgB2 superconducting wire. The resistivity versus temperature relationship, surface morphology, and crystal phase was characterized using Cryogenic system, SEM (Scanning Electron Microscopy), and XRD (X-ray Diffractometer), respectively. We optimized the high Tc,onset for the bulk and 4 mm wire compared to other studies that are 42.1K and 40.3K respectively at 800°C sintered temperature. Finally, the results suggest that the stoichiometric ratio of MgB2 exhibited excellent feasibility to prepare conventional MgB2 superconducting wire.

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Possibility of the Higher Critical Temperature on MgB2 Superconductor Synthesized by Powder-In-Sealed-Tube Method

Cited by 7 publications

References 21 publications

Advancements and Challenges in Power Cable Laying

Advancements and Challenges in Power Cable Laying

Influence of CNTs addition on structural and superconducting properties of mechanically alloyed MgB<sub>2</sub>

Study on the Sintering and Mg Composition Effect on MgB<sub>2</sub> Superconducting Bulks and Wires Synthesized by Powder-in-Sealed-Tube Method

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