Spectroscopic and thermographic study of Ni–Zn ferrites

Abstract

In the present work, the spinel ferrites system Ni x Zn 1-x Fe 2 O 4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) is synthesized by using auto-combustion method to throw light on the influence of particle size on structural, elastic, and thermal properties of ferrites. The auto-combustion method with some modification is exploited for synthesis of the materials. The X-ray diffractometry was employed to confirm the single phase spinel structure formation and to determine the cell-edge parameters. The elastic properties are studied by using Fourier transform infrared transmission spectroscopy (FTIR) at 27°C. The force constants for tetrahedral (A) and octahedral (B) sites of the spinel lattice are determined through infrared spectral analysis. The elastic constants like Bulk modulus, Rigidity modulus, Young's modulus, and Poisson's ratio are determined. Thermography is used to study thermal process of the combustion reaction, and thermal study is used to determine thermal parameters. Main idea is to minimize the synthesis cost of the ferrite materials used together with tailoring the structural, elastic, and thermal properties of the ferrites required for the desired applications.

Ceramics and defects

“…A ceramic sample at the ''green'' state, i.e., a porous material, has been inspected by means of both IRT technique [78,79] and a numerical simulation [80,81] realized thanks to Comsol Ò Multiphysics computer program. The sample contains artificial heterogeneous inclusions, i.e., subsuperficial defects.…”

X-Ray and Thermogravimetric Analyzes of Mechanically Activated Nickel Ferrites

“…Thermal analysis was carried out on STA 449C Jupiter (Netzsch) thermal analyzer [12,13]. A part of the equipment including a heating furnace, a sample holder, and thermocouple is schematically shown in Fig.…”