Impact of sonochemical synthesis condition on the structural and physical properties of MnFeO spinel ferrite nanoparticles.

Author(s) Yadav, R.Singh; Kuřitka, I.; Vilčáková, J.; Jamatia, T.; Machovský, M.; Škoda, D.; Urbánek, P.; Masař, M.; Urbánek, M.; Kalina, L.; Havlica, J.
Journal Ultrason Sonochem
Date Published 2019 Oct 23
Abstract

Herein, we report sonochemical synthesis of MnFeO spinel ferrite nanoparticles using UZ SONOPULS HD 2070 Ultrasonic homogenizer (frequency: 20 kHz and power: 70 W). The sonication time and percentage amplitude of ultrasonic power input cause appreciable changes in the structural, cation distribution and physical properties of MnFeO nanoparticles. The average crystallite size of synthesized MnFeO nanoparticles was increased with increase of sonication time and percentage amplitude of ultrasonic power input. The occupational formula by X-ray photoelectron spectroscopy for prepared spinel ferrite nanoparticles was (MnFe)[MnFe]O and (MnFe) [MnFe]O at sonication time 20 min and 80 min, respectively. The value of the saturation magnetization was increased from 1.9 emu/g to 52.5 emu/g with increase of sonication time 20 min to 80 min at constant 50% amplitude of ultrasonic power input, whereas, it was increased from 30.2 emu/g to 59.4 emu/g with increase of the percentage amplitude of ultrasonic power input at constant sonication time 60 min. The highest value of dielectric constant (ε') was 499 at 1 kHz for nanoparticles at sonication time 20 min, whereas, ac conductivity was 368 × 10 S/cm at 1 kHz for spinel ferrite nanoparticles at sonication time 20 min. The demonstrated controllable physical characteristics over sonication time and percentage amplitude of ultrasonic power input are a key step to design spinel ferrite material of desired properties for specific application. The investigation of microwave operating frequency suggest that these prepared spinel ferrite nanoparticles are potential candidate for fabrication of devices at high frequency applications.

DOI 10.1016/j.ultsonch.2019.104839
ISSN 1873-2828
Citation Ultrason Sonochem. 2019;61:104839.

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