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http://dx.doi.org/10.9714/psac.2017.19.1.047

A safe and cost-effective PMMA carbon source for MgB2  

Ranot, Mahipal (Materials Deformation Department, Korea Institute of Materials Science)
Jang, S.H. (Kiswire Advanced Technology Ltd)
Shinde, K.P. (Functional Nano Powder Materials Department, Korea Institute of Materials Science)
Sinha, B.B. (National Centre for Nanoscience and Nanotechnology, University of Mumbai)
Bhardwaj, A. (Department of Physics, Sungkyunkwan University)
Oh, Y.S. (Materials Deformation Department, Korea Institute of Materials Science)
Kang, S.H. (Materials Deformation Department, Korea Institute of Materials Science)
Chung, K.C. (Functional Nano Powder Materials Department, Korea Institute of Materials Science)
Publication Information
Progress in Superconductivity and Cryogenics / v.19, no.1, 2017 , pp. 47-50 More about this Journal
Abstract
Carbon is proven to be very effective in pinning the magnetic vortices and improving the superconducting performance of $MgB_2$ at high fields. In this work, we have used polymethyl methacrylate (PMMA) polymer as a safe and cost effective carbon source. The effects of molecular weight of PMMA on crystal structure, microstructure as well as on superconducting properties of $MgB_2$ were studied. X-ray diffraction analysis revealed that there is a noticeable shift in (100) and (110) Bragg reflections towards higher angles, while no shift was observed in (002) reflections for $MgB_2$ doped with different molecular weights of PMMA. This indicates that carbon could be substituted in the boron honeycomb layers without affecting the interlayer interactions. As compared to undoped $MgB_2$, substantial enhancement in $J_c(H)$ properties was obtained for PMMA-doped $MgB_2$ samples both at 5 K and 20 K. The enhancement could be attributed to the effective carbon substitution for boron and the refinement of crystallite size by PMMA doping.
Keywords
PMMA; $MgB_2$; superconducting properties;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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