skip to main content

SciTech ConnectSciTech Connect

Title: Extrinsic mechanism for giant dielectric response in Ba{sub 0.70}Sr{sub 0.30}(Fe{sub 0.5}Nb{sub 0.5})O{sub 3} ceramic

To obtain the high dielectric constant, the effect of sintering process on the electrical properties of Ba{sub 0.70}Sr{sub 0.30}(Fe{sub 0.5}Nb{sub 0.5})O{sub 3} ceramics were investigated. X-ray diffraction pattern of the samples at room temperature shows a monoclinic structure. Microstructure analysis shows well-grown and dense microstructure in all the samples. We found giant dielectric constant (∼3.59 × 10{sup 5}) with low dielectric loss (∼0.49) at room temperature for 2 hr sintered sample at 1250 °C. The extrinsic phenomena like interfacial polarization due to space charge accumulation at grain boundaries are discussed.
Authors:
; ;  [1]
  1. Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee-247667 (India)
Publication Date:
OSTI Identifier:
22269508
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM COMPOUNDS; CERAMICS; FERRITES; GRAIN BOUNDARIES; MONOCLINIC LATTICES; NIOBATES; PERMITTIVITY; POLARIZATION; RELAXATION LOSSES; SINTERING; STRONTIUM COMPOUNDS; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION