CERN Accelerating science

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1.
Weak acid leaching of MgB$_2$ to purify magnesiothermic boron powder / Capra, Marco (Genoa U.) ; Bovone, Gianmarco (CNR, Italy) ; Loria, Federico (CNR, Italy) ; Bernini, Cristina (CNR, Italy) ; Hopkins, Simon C (CERN) ; Ballarino, Amalia (CERN) ; Tropeano, Matteo (ASG Supercond., Genova) ; Tumino, Andrea (ASG Supercond., Genova) ; Grasso, Gianni (ASG Supercond., Genova) ; Ferdeghini, Carlo (CNR, Italy) et al.
We have established a new procedure for recovering boron contained in oxidized MgB$_2$ phase. Incorrect conditions of synthesis or conservation, or excess impurities in precursors, can lead to MgO formation with consequent degradation of superconducting properties, thus representing a possible problem in the industrial production of MgB$_2$ conductors following the ex-situ PIT process. [...]
2021 - Published in : Materials Today Communications 26 (2021) 101731
2.
Reverse advance internal magnesium diffusion process to produce dense MgB$_{2}$ bulks and high $J$$_{C}$ wires through high pressure heat treatment / Bovone, G. (U. Genoa) ; Capra, M. (U. Genoa) ; Bernini, C. (Genoa U.) ; Loria, F. (U. Genoa) ; Cetner, T. (Warsaw, Inst. Phys.) ; Gajda, D. (Wroclaw, Inst. Low Temp.) ; Morawski, A. (Warsaw, Inst. Phys.) ; Ballarino, A. (CERN) ; Hopkins, S. C. (CERN) ; Tropeano, M. (ASG Supercond., Genova) et al.
Here we report a new versatile technique to manufacture MgB$_{2}$ massive samples, called reverse advance internal magnesium diffusion (r-AIMI). The idea focuses on the goal of obtaining dense bulk or wire samples depending on synthesis conditions. [...]
2020 - 8 p. - Published in : Supercond. Sci. Technol. 33 (2020) 125003
3.
Characterization of Freeze-Dried Boron Nanopowders and Parameter Optimization in Ex Situ MgB2 Wire Production / Capra, Marco (U. Genoa ; CNR-SPIN, Naples) ; Bovone, Gianmarco (CNR-SPIN, Naples) ; Loria, Federico (CNR-SPIN, Naples) ; Bernini, Cristina (CNR-SPIN, Naples) ; Tropeano, Matteo (ASG Supercond., Genova) ; Tumino, Andrea (ASG Supercond., Genova) ; Grasso, Gianni (ASG Supercond., Genova) ; Hopkins, Simon C (CERN) ; Ballarino, Amalia (CERN) ; Ferdeghini, Carlo (Genoa U.) et al.
This article reports a study to identify optimal synthesis parameters for a pure boron precursor prepared following a patented process developed at CNR-SPIN laboratories, performed in the framework of a collaboration between CNR-SPIN and CERN. Boron is a precursor that plays a crucial role in the MgB2wire manufacturing, as a consequence, the synthesis parameters of the superconducting phase have been investigated. [...]
2021 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 6200107

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