Understanding the impacts of Al+3-substitutions on the enhancement of magnetic, dielectric and electrical behaviors of ceramic processed nickel-zinc mixed ferrites: FTIR assisted studies. (January 2018)

• Record Type: Journal Article
• Authors: Bromho, Tapos Kumar; Ibrahim, Khalil; Kabir, Humayun; Rahman, M. Mahbubur; Hasan, Kamrul; Ferdous, Tahmina; Taha, Hatem; Altarawneh, Mohammednoor; Jiang, Zhong-Tao
• Is Part Of: Materials research bulletin. Volume 97(2018)
• Page Start: 444
• Page End: 451
• Publication Date: 2018-01
• Subjects: Ni-Al-Zn ferrites -- Surface morphology -- Permeability -- Q-factor -- Loss tangent -- AC resistivity; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.09.013
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Al-doped ceramic Ni-Zn ferrites are studied. Octahedral and tetrahedral vibrations were confirmed via FTIR studies. Curie temperature was systematically reduced with subsequent Al-doping. AC resistivity and loss tangent were significantly reduced with Al-content. Dielectric behavior was associated with the bi-layer space-charge polarization. Abstract: Al-incorporated Ni-Zn ferrites (Ni0.65 Zn0.35 Al x Fe2 − x O4, where x = 0, 0.03, 0.06, 0.09, 0.12) synthesized via standard ceramic technology were investigated for their structural, magnetic, dielectric, and electrical properties. Al substitution plays a remarkable role in refining the structural features and other properties of the ferrite particles. The bulk density, porosity and lattice parameters of Ni-Zn ferrites were decreased with increased Al-content while the X-ray density was reduced. XRD patterns confirmed the single-phase cubic spinel structure of the ferrites particles. The room temperature infra-red spectra shows the features of higher and lower energy bands detected at ν 2 ∼ 400–405 cm −1 and ν 1 ∼ 590–594 cm −1, respectively corresponded to tetrahedral (T-band) and octahedral vibration (O-band) complexes that also confirm the formation of Ni-Zn inverse spinels. The real part of the complex initial permeability, Curie temperature, ac resistivity and loss tangent of the ferrite powders were reduced while the quality factor was enhanced with the subsequent Al-substitution. The observed bi-layer space charge polarization feature was believed to correlate the normal dielectric behavior of Al-substituted Ni-Zn matrix.