Dielectric relaxation and electrical properties of Bi 2.5 Nd 0.5 Nb 1.5 Fe 0.5 O 9 ceramics

Fida Rehman, Jing Bo Li, Iftikhar Ahmad, Hai Bo Jin, Pervaiz Ahmad, Yasir Saeed, Muhammad Shafiq, Hazrat Ali, Muhammad Imtiaz Khan, Tariq Ali

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Aurivillius single-phase Bi 2.5 Nd 0.5 Nb 1.5 Fe 0.5 O 9 (BNNF) ceramics was synthesized via solid state mixed oxide sintering method. Electrical properties of the samples were intensely studied in a wide range of temperature (25 °C–650 °C). Dielectric behaviors were investigated by dielectric and impedance spectroscopies in the range (40 Hz−10 MHz) of frequency. Single dielectric relaxation was observed due to the grains contribution. The phase transition temperature (T C ) was noticed at ∼270 °C. Kinetic analysis of dielectric data was used to understand the possible relaxation-conduction behaviors in the ceramics. Above ∼250 °C, relaxation and conduction of the ceramics was assigned to the motion of ionized oxygen vacancies. The Aurivillius ceramics has promising industrial applications in dielectric capacitors and piezoelectric transducers due to low leakage below ∼200 °C. The results could be valuable for designing and/or modifying properties of BNNF related materials.

Original languageEnglish
Pages (from-to)100-105
Number of pages6
JournalMaterials Chemistry and Physics
Volume226
DOIs
Publication statusPublished - Mar 15 2019
Externally publishedYes

Keywords

  • Aurivillius compound
  • Defects
  • Dielectric
  • Electrical properties
  • Impedance analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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