Characterization and Magnetic Properties of Nanoparticle Ni1−x Zn x Fe2O4 Ferrites Prepared Using Microwave Assisted Combustion Method

Abstract

Nanoparticle Ni 1−x Zn x Fe 2 O 4 (x = 0.35, 0.45) samples were prepared successfully via microwave assisted combustion method. Synthesis of nanosize materials at a low temperature using a domestic microwave oven is the unique feature of this method and is being tried for the first time to produce NiZn ferrites. Single-phase formation of the samples was confirmed from X-ray analysis and IR spectrum. XRD data reveals that lattice parameter increases with Zn content 'x'. Particle sizes calculated from XRD analysis are in good agreement with TEM results. Extent of spin canting at octahedral B-site is deduced from Yafet-Kittel angles. Surface properties and reduced particle size affects the Curie temperature.

Synthesis of Ni0.5Zn0.5Fe2O4-reinforced E-glass/epoxy nanocomposites for radar-absorbing structures

“…The presence of sharp peaks indicates high crystallinity. The crystallite size was determined by applying the Debye–Scherrer formula [39]. where t is the crystallite size, λ is the radiation wavelength, B is the width at the half-height of the diffraction peak in radians and θ is the diffraction angle.…”

“…The presence of sharp peaks indicates high crystallinity. The crystallite size was determined by applying the Debye-Scherrer formula [39].…”

“…The peak positions comply with JCPDS file no. 8-0234 [38], corresponding to the crystallographic planes of the single-phase cubic spinel structure of Ni 0.5 Zn 0.5 Fe 2 O 4 with no impurity phase [39][40][41]. The presence of sharp peaks indicates high crystallinity.…”

Síntese E Caracterização De Ferrita De Níquel E Níquel-Zinco Pelo Método De Polimerização De Complexos

“…Já para a ferrita Ni-Zn, os íons Fe 2+ e Ni 2+ estariam situados nas posições semelhantes a ferrita de Ni, com a inclusão apenas dos íons Zn 2+ nos sítios tetraédricos. Em ambos os sistemas, os íons Fe 2+ em excesso nos dois sítios tende a sair do sistema e combinar com o oxigênio da atmosfera do forno na etapa de calcinação para formar hematita (α -Fe2O3)fase adicional [13]. A temperatura de calcinação (500°C) conferiu a cristalinidade dos pós obtidos e favoreceu a formação da fase adicional hematita (α -Fe2O3), concordando com os resultados da literatura [12].…”

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

“…Parameters such as composition, grain size, amount of dopants, impurities, production method, and heating conditions are sensitive in relation to the microstructural properties of Ni-Zn ferrites. The stoichiometry and processing methods are critical factors that determine the physical and magnetic properties of this material [10,11].…”