عنوان المقالة: Understanding the impacts of Al+3-substitutions on the enhancement of magnetic, dielectric and electrical behaviors of ceramic processed nickelzinc mixed ferrites: FTIR assisted studies
Al-incorporated Ni-Zn ferrites (Ni0.65Zn0.35AlxFe2 − xO4, 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 Alcontent 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 ν2 ∼ 400–405 cm−1 and ν1 ∼ 590–594 cm−1, respectively corresponded to tetrahedral (Tband) 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.
تاريخ النشر
09/09/2017
الناشر
Materials Research Bulletin/ Elsevier
رقم المجلد
رقم العدد
ISSN/ISBN
0025-5408
رابط DOI
http://dx.doi.org/10.1016/j.materresbull.2017
الصفحات
444-451
الكلمات المفتاحية
Ni-Al-Zn ferrites Surface morphology Permeability Q-factor Loss tangent AC resistivity
حاتم عبدالرزاق طه | Hatem Taha | 2429