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Effect of Sintering Temperature on Structural, Morphological, and Magnetic Properties of Nickel Ferrite Prepared via a Polyol Method
Author(s) -
Patil Rajendra P.,
Waghmare Mahendra B.,
Kalantre Vilas M.,
Kadam Mohan R.,
Chikalkar Milind G.,
Delekar Sagar D.
Publication year - 2020
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.202000178
Subject(s) - materials science , sintering , coercivity , scanning electron microscope , crystallite , microstructure , ferrite (magnet) , analytical chemistry (journal) , differential thermal analysis , atmospheric temperature range , particle size , transmission electron microscopy , metallurgy , composite material , chemical engineering , diffraction , chemistry , nanotechnology , optics , physics , engineering , chromatography , meteorology , condensed matter physics
Abstract The effects of sintering temperature on the structural and magnetic properties of polycrystalline nickel ferrite synthesized by the novel polyol method are investigated. The effects of heat treatment temperature on crystalline phases formation, microstructure, and magnetic properties of Ni ferrite are investigated by x‐ray diffraction (XRD), thermogravimetric, and differential thermal analysis, scanning electron microscopy, transmission electron microscopy, Fourier‐transform infrared spectroscopy (FT‐IR), and B‐H loop tracer technique. The XRD plot of the powder samples sintered at different temperature shows increase in the peak intensity values with respect to temperature of sintering thereby showing an increasing crystallinity of the samples with an increasing sintering temperature. FT‐IR spectra for sample sintered at 773 K shows two sharp bands on octahedral and tetrahedral sites. Scanning electron micrographs show spherical and uniform grains which is observed on sintering temperature 773 K. Particle size of nickel ferrite is in the range of 11–15 nm, and depends on the sintering temperature and sintering time. The saturation magnetization increased from 23.45 to 45.61 emu g −1 and coercivity increases from 327.27 to 1097.03 Oe with an increase in particle size.