Nano SiC doped MgB2 bulk superconductor with Tc over 42 K by high gas pressure annealing

Andrzej J. Morawski 2Tomasz P. Łada 2Adam M. Presz 2Tadeusz Mazur 2Ryszard Diduszko 3,7Andrzej J. Zaleski 1Kazimierz Przybylski 4Silvia Bodoardo 6Valeria Dellarocca 5

1. Polish Academy of Sciences, Institute of Low Temperature and Structure Research (INTiBS), Okólna 2, Wrocław 50-422, Poland
2. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
3. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
4. AGH University of Science and Technology (AGH), al. Mickiewicza 30, Kraków 30-059, Poland
5. Dipartimento di Fisica, Politecnico di Torino, Italy, corso Duca degli Abruzzi, 24, Torino 10129, Italy
6. Politecnico di Torino - Dipartimento di Scienze dei Materiali e Ingegneria Chimica, Duca degli Abruzzi 24, Torino 10129, Italy
7. Industrial Institute of Electronics (PIE), Dluga, Warszawa 00-241, Poland


Since affirm that the MgB2 is a potentially promising material for the large-scale application as superconducting devices, the proper doping substance that can increase the Jc or Tc has been intensively searched. One of the most interesting doping argent is nano-SiC powder.
We investigated the effect of the nano-powder SiC doping of two average grade batches: 6 nm and 18 nm, with the content up to 10 at. % for the commercial MgB2 powder made by Alfa Aesar.
The syntheses have been made on the cylindrical samples of 3 mm in diameter and 5 to 7 mm in length. Such samples were obtained by uni-axial pressing at 1.5 GPa in three sectors open anvils.
Synthesis were made at an inert gas at pressure of up to 1 GPa at temperature from 1500 K to 1550 K, in the high pressure gas trap system, with the equilibrium magnesium vapor made by the melting of Mg chips inside close vessels, during the experiment lasting for two hours.
As obtained samples thus were superconducting with Tc over 39 K and the highest Tc at 42.6 K was recorded for the sample doped with 1.5 at % of the 6nm SiC. The XRD examinations indicated the MgB2 phase and a very low addition of Mg, Si and C composites and/or SiC as well as Mg2Si nano-crystallites. The compositions of the additional phase were strictly dependent of the nano-size grains dimensions (their solubility) and quantity. The lattice parameters for all samples were smaller than for pure MgB2 initial samples. The SEM, EDX and superconducting properties Hc2, Tc, Jc, were measured and discussed. The probably effect of tangential strain caused by nano-inclusion of thin amorphous or crystalline layer between the pure or carbon doped MgB2 larger grain are considered for increasing the Tc of our samples.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Zaawansowana Charakteryzacja Nanocząstek
  2. [CEPT] Solvothermal synthesis and characterization of nanomaterials in the Laboratory of Nanostructures for Photonics and Nanomedicine, Center of Bio-Nanomaterials
  3. Scanning Electron Microscopy Investigations and Analysis of Nanostructures
  4. Safe nanomaterials of spinel structure for lithium-ion secondary batteries 
  5. Czochralski growth and characterization of MgAl2O4 single crystals
  6. Presentation of the  Laboratory of Nanostructures for Photonics and Nanomedicine, Center of Bio-Nanomaterials, CePT
  7. Application of the Zeiss Ultra Plus scanning microscopy in bio-nanotechnology 
  8. Synthesis and studies on LiMn2O4/Carbon nanocomposites as a cathode materials for lithium ion batteries
  9. Materials for lithium ion batteries
  10. Procedury charakteryzacji nanoproszków
  11. Hydrothermal Synthesis of ZnAl2O4 Spinel
  12. Synthesis of Al doped ZnO nanopowders and their enhanced luminescence
  13. Combining microwave and pressure techniques for hydrothermal synthesis of ZnO and ZrO2 nanopowders doped with a range of metal ions
  14. Luminescence properties of zinc oxide nanopowders doped with Al ions obtained by the hydrothermal and vapour condensation methods.
  15. Nanosized barium hexaferrite powders obtained by single microemulsion techniques
  16. X-ray Absorption Fine Structure study of nickel grains embedded in the carbonaceous films
  17. Fast luminescence in ZnO structures
  18. Structural and magnetic properties of nanosized barium hexaferrite powders obtained by microemulsion techniques
  19. Yttrium-Aluminum Garnet Synthesized in the Medium of Supercritical Fluids
  20. Growth and microstructure of ZnO – Bi2O3 eutectic
  21. Catalytic growth by molecular beam epitaxy and properties of ZnTe-based semiconductor nanowires
  22. Self-organized microstructure of TiO2-MnO
  23. Self- organized eutectic microstructures for photonic crystals and metamaterials
  24. Growth and characterization of Nd, Yb – Yttrium oxide nanopowders obtained by sol-gel method
  25. Initial Stage of SiC Crystal Growth by PVT Method
  26. Morphology of Al doped Zinc Oxide Obtained using Hydrothermal and Vapour Condensation Methods
  27. Morphology of Al doped zinc oxide obtained by the vapour condensation method
  28. Morphology of Al-Doped Zinc Oxide Obtained by the Vapour Condensation Methods
  29. Production and sintering of diamond particles with nanometric nickel coating
  30. The superconducting gaps of C-substituted and Al-substituted MgB2 single crystals by point-contact spectroscopy
  31. Influence of synthesis conditions on the particles size and the morphology of zinc oxide nanopowders
  32. Development of microstructure and mechanical properties in nickel deformed by hydrostatic extrusion
  33. ZrNi2In - New Superconducting Heusler Alloy
  35. MgB2 thin films fabrication and structuring
  36. Investigation of the microstructure of SiC-Zn nanocomposites by microscopic methods: SEM, AFM and TEM
  37. Microstructure of Fe3O4 film grown on Si(100) substrate, investigated by TEM and X-ray methods
  38. Zinc oxide nanopowders obtained by the microwave-hydrothermal route
  39. Microwave driven hydrothermal synthesis of Pr-doped zirconia nanopowders
  40. Tl-2201 Synthesis at High Isostatic Pressure
  41. Reaction Diffusion in Metallic Systems under High Pressure
  42. Microwave-Hydrothermal Synthesis of Nanostructured Pr-Doped Zirconia Powders
  43. Structure, Morphology and Luminescence Properties of Pr-doped Nanocrystalline ZrO2 Obtained by Hydrothermal Method
  44. Hydrothermal Synthesis of Zinc Oxide Nanopowders with Microwaves Applications
  45. Microwave Driven Hydrothermal Synthesis of Iron Oxide Nanopowders

Presentation: oral at E-MRS Fall Meeting 2004, Symposium E, by Andrzej J. Morawski
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-04-30 23:52
Revised:   2009-06-08 12:55
© 1998-2022 pielaszek research, all rights reserved Powered by the Conference Engine