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Journal of Advanced Ceramics

, Volume 5, Issue 2, pp 159–166 | Cite as

Dielectric properties of (Zn) x /CuTl-1223 nanoparticle-superconductor composites

  • M. MumtazEmail author
  • Liaqat Ali
  • Shoaib Azeem
  • Saad Ullah
  • G. Hussain
  • M. W. Rabbani
  • Abdul Jabbar
  • K. Nadeem
Open Access
Research Article

Abstract

Zinc (Zn) nanoparticles and (Cu0.5Tl0.5)Ba2Ca2Cu3O10−δ (CuTl-1223) superconducting phase were prepared separately by sol-gel and solid-state reaction methods, respectively. Zn nanoparticles were added in CuTl-1223 superconducting matrix with different weight percentage during the final sintering process to obtain (Zn) x /CuTl-1223 (x = 02-4 wt%) nanoparticle-superconductor composites. The effect of Zn nanoparticles on structural, morphological, superconducting, and dielectric properties of CuTl-1223 phase was investigated. The addition of these Zn nanoparticles has not affected the crystal structure of host CuTl-1223 superconducting phase. Superconducting properties were enhanced after the addition of Zn nanoparticles up to certain optimum content (i.e., x = 1 wt%), which were due to improved inter-grain connectivity by healing up of micro-cracks and reduction of defects like oxygen deficiencies, etc. The activation energy (U) was increased after the addition of Zn nanoparticles in CuTl-1223 phase. The dielectric properties of these samples (i.e., dielectric constant, dielectric loss) were determined by experimentally measured capacitance (C) and conductance (G) as a function of frequency at room temperature. The addition of metallic Zn nanoparticles in CuTl-1223 matrix has overall suppressed the dielectric parameters of (Zn) x /CuTl-1223 nanoparticle-superconductor composites. The metallic Zn nanoparticles played a significant role in inter-grain couplings by filling the voids and pores.

Keywords

(Zn)x/CuTl-1223 nanoparticle-superconductor composites dielectric properties activation energy 

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Copyright information

© The Author(s) 2016

Authors and Affiliations

  • M. Mumtaz
    • 1
    Email author
  • Liaqat Ali
    • 1
  • Shoaib Azeem
    • 1
  • Saad Ullah
    • 1
  • G. Hussain
    • 1
  • M. W. Rabbani
    • 1
  • Abdul Jabbar
    • 2
  • K. Nadeem
    • 1
  1. 1.Materials Research Laboratory, Department of Physics, FBASInternational Islamic University (IIU)IslamabadPakistan
  2. 2.Department of PhysicsGhazi UniversityDera Ghazi KhanPakistan

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