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Title: Mechanism of Enhanced Carbon Substitution in CNT-MgB{sub 2} Superconductor Composite Using Ball Milling in a Methanol Medium: Positive Role of Boron Oxide

Abstract

In the present work, we report on the role of the methanol medium and ball-milling time in the substitution of carbon in carbon nanotube CNT-MgB{sub 2} superconductors. In our samples, we find that the CNTs are intact and well dispersed. However, the liquid medium (methanol) used for dispersion of the constituent materials is also acting as a source of C for substitution. However, the substitution of C from methanol is not direct; rather, B{sub 2}O{sub 3}, which had been considered as just an impurity, plays a positive role in binding the methanol molecules to the surface of B. The detailed mechanism of methanol absorption and the role of B{sub 2}O{sub 3} and ball-milling time are presented here. In addition, we present the J{sub C}(H, T) data, which show that approximately 3% of C substitution provides the best critical current density at 20 K.

Authors:
 [1]; ; ;  [2];  [3]; ;  [4];  [5]
  1. King Abdulaziz City for Science and Technology (KACST), National Center for Nanotechnology (Saudi Arabia)
  2. King Saud University (KSU), Department of Physics and Astronomy, College of Science (Saudi Arabia)
  3. Prince Sattam bin Abdulaziz University, Department of Physics, College of Science and Humanity Studies (Saudi Arabia)
  4. King Saud University, King Abdullah Institute for Nanotechnology (KAIN) (Saudi Arabia)
  5. University of Wollongong, Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials (Australia)
Publication Date:
OSTI Identifier:
22776973
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 4; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BORON OXIDES; CARBON; CARBON NANOTUBES; CRITICAL CURRENT; DISPERSIONS; MAGNESIUM BORIDES; METHANOL; MILLING; SUPERCONDUCTORS

Citation Formats

Alghamdi, Fahad Saad, Shahabuddin, M., E-mail: mshahab@ksu.edu.sa, Alzayed, Nasser S., Madhar, Niyaz Ahamad, Parakkandy, Jafar M., Khan, M. A. Majeed, Khan, Aslam, and Hossain, Md. Shahriar Al. Mechanism of Enhanced Carbon Substitution in CNT-MgB{sub 2} Superconductor Composite Using Ball Milling in a Methanol Medium: Positive Role of Boron Oxide. United States: N. p., 2018. Web. doi:10.1007/S10948-017-4279-Y.
Alghamdi, Fahad Saad, Shahabuddin, M., E-mail: mshahab@ksu.edu.sa, Alzayed, Nasser S., Madhar, Niyaz Ahamad, Parakkandy, Jafar M., Khan, M. A. Majeed, Khan, Aslam, & Hossain, Md. Shahriar Al. Mechanism of Enhanced Carbon Substitution in CNT-MgB{sub 2} Superconductor Composite Using Ball Milling in a Methanol Medium: Positive Role of Boron Oxide. United States. doi:10.1007/S10948-017-4279-Y.
Alghamdi, Fahad Saad, Shahabuddin, M., E-mail: mshahab@ksu.edu.sa, Alzayed, Nasser S., Madhar, Niyaz Ahamad, Parakkandy, Jafar M., Khan, M. A. Majeed, Khan, Aslam, and Hossain, Md. Shahriar Al. Sun . "Mechanism of Enhanced Carbon Substitution in CNT-MgB{sub 2} Superconductor Composite Using Ball Milling in a Methanol Medium: Positive Role of Boron Oxide". United States. doi:10.1007/S10948-017-4279-Y.
@article{osti_22776973,
title = {Mechanism of Enhanced Carbon Substitution in CNT-MgB{sub 2} Superconductor Composite Using Ball Milling in a Methanol Medium: Positive Role of Boron Oxide},
author = {Alghamdi, Fahad Saad and Shahabuddin, M., E-mail: mshahab@ksu.edu.sa and Alzayed, Nasser S. and Madhar, Niyaz Ahamad and Parakkandy, Jafar M. and Khan, M. A. Majeed and Khan, Aslam and Hossain, Md. Shahriar Al},
abstractNote = {In the present work, we report on the role of the methanol medium and ball-milling time in the substitution of carbon in carbon nanotube CNT-MgB{sub 2} superconductors. In our samples, we find that the CNTs are intact and well dispersed. However, the liquid medium (methanol) used for dispersion of the constituent materials is also acting as a source of C for substitution. However, the substitution of C from methanol is not direct; rather, B{sub 2}O{sub 3}, which had been considered as just an impurity, plays a positive role in binding the methanol molecules to the surface of B. The detailed mechanism of methanol absorption and the role of B{sub 2}O{sub 3} and ball-milling time are presented here. In addition, we present the J{sub C}(H, T) data, which show that approximately 3% of C substitution provides the best critical current density at 20 K.},
doi = {10.1007/S10948-017-4279-Y},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 4,
volume = 31,
place = {United States},
year = {2018},
month = {4}
}