Advances in materials Research

  • 제5권3호
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  • Pages.181-192
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  • 2016
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  • 2234-0912(pISSN)
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  • 2234-179X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Effect of milling on the electrical properties of Ba(Fe1/2Ta1/2)O3 ceramic

  • Mahto, Uttam K. (Aryabhatta Centre for Nanoscience and Nanotechnology, Aryabhatta Knowledge University) ;
  • Roy, Sumit K. (Department of Physics, St. Xavier's College) ;
  • Chaudhuri, S. (Department of Physics, St. Xavier's College) ;
  • Prasad, K. (Aryabhatta Centre for Nanoscience and Nanotechnology, Aryabhatta Knowledge University)
  • 투고 : 2016.08.25
  • 심사 : 2016.11.28
  • 발행 : 2016.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this work effect of high energy milling on the structural and electrical properties of $Ba(Fe_{1/2}Ta_{1/2})O_3$ (BFT) ceramic synthesized using standard solid-state reaction method were investigated. X-ray diffraction studies indicated that the unit cell structure for all the samples to be hexagonal (space group: P3m1). FTIR spectra also confirmed the formation of BFT without any new phase. The milled (10 h) BFT ceramic showed the formation of small grain sizes (<$2{\mu}m$) which is beneficial for dielectric applications in high density integrated devices. Besides, the milled (10 h) BFT ceramic sample exhibited superior dielectric properties (enhancement in ${\varepsilon}^{\prime}-value$ and reduction in $tg{\delta}-value$) compared to un-milled one. Impedance analysis indicated the negative temperature coefficient of resistance (NTCR) character. The correlated barrier hopping model (jump relaxation type) is found to successfully explain the mechanism of charge transport in present ceramic samples.

키워드

참고문헌

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피인용 문헌

  1. Physical properties of lead-free BaFe1/2Nb1/2O3 ceramics obtained from mechanochemically synthesized powders vol.53, pp.19, 2018, https://doi.org/10.1007/s10853-018-2254-z
  2. Mechanochemical Activation and Spark Plasma Sintering of the Lead-Free Ba(Fe1/2Nb1/2)O3 Ceramics vol.14, pp.9, 2016, https://doi.org/10.3390/ma14092254