The Influence of Milling Time and &lt;inline-formula&gt; &lt;tex-math notation="TeX"&gt;$\hbox{ZrB}_{2}$&lt;/tex-math&gt;&lt;/inline-formula&gt; Addition on the Superconducting Properties of &lt;inline-formula&gt; &lt;tex-math notation="TeX"&gt;$\hbox{MgB}_{2}$&lt;/tex-math&gt;&lt;/inline-formula&gt;

Supercond. Sci. Technol.

Serquis

Hellstrom³

et al. 2023

Optimization of intrinsic and extrinsic properties of MgB2 superconducting material is extremely important for practical application in cables, wires, and tapes. The main mechanisms used to obtain this optimization are through the synthesis process, improvement in the grain connectivity, densification, pinning, doping, and limiting MgO formation. Many groups around the world use elements such as Ti, Zr, Hf, Al, Mn, Si and others, as dopants. Defects or any other inhomogeneity in the superconducting matrix can improve the flux pinning behavior and, hence, the transport properties. In this work MgB2 superconducting bulks with additions of AlB2 powder were prepared and analyzed in an attempt to enhance the critical current density of MgB2 and to understand the effect of this addition on the intrinsic and extrinsic characteristics of the material. Crystallographic, microstructural, optical, and superconducting characterization were performed and analyzed. AlB2 additions modified the superconducting properties of MgB2 increasing its critical current density and irreversibility field compared to pure MgB2 prepared using the same procedures.

Section: Introductionmentioning

confidence: 99%

The effect of AlB₂ addition on MgB₂ superconducting bulks

Supercond. Sci. Technol.

Serquis

Hellstrom³

et al. 2023

Artificial pinning centers in MgB₂ superconducting bulks

Supercond. Sci. Technol.

Serquis

Hellstrom

et al. 2020

The optimization of MgB 2 superconducting properties is extremely important for practical application. The introduction of an effective artificial pinning center in this material can enhance its critical current density efficiently. In this paper, VB 2 is described as a material that provides effective pinning in the MgB 2 bulks. The simultaneous addition of SiC as a carbon source is also analyzed. The samples were prepared using ball milling under a controlled atmosphere and heat treatment with a continuous argon flux. As a result, the superconducting properties could be optimized due to the effective improvement in the pinning behavior as well as with the carbon doping.

Nb sheathed MgB₂ superconducting tape with addition of VB₂

Andreotti

Rodrigues

2020

J. Phys.: Conf. Ser.

MgB2 superconductor is a strategic material for practical applications, due to its superconducting properties as well as the low cost of the raw materials. For many technological applications cable, wire or tape format are required. The addition of VB2 in the MgB2 superconducting bulk had already been used in previous works as an efficient method to enhance the critical current density of the MgB2. In the present work, MgB2 superconducting tapes were developed and characterized using different amount of VB2 addition. Niobium was used as sheath material. The goal of this work is to create an efficient method to improve the transport properties of MgB2 superconducting tapes to be useful for practical application. The results include microstructural, crystallographic, magnetic and transport characterizations. All analyzes were performed together to study the influence of the VB2 addition on the superconducting behavior of MgB2 tapes.