The formation mechanism of MnZn ferrite by the CTAB-assisted synthesis

MnZn ferrite powders were prepared, based on the novel nano-in-situ composite method and through chemical sol–spray–calcination technology. Different dosage of CTAB were used, and the influences on the precursor sol solutions and precursor powders were studied. Also, the selected precursor powders (...

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Bibliographic Details
Published in:Journal of materials science 2024-10, Vol.59 (40), p.19244-19253
Main Authors: Xu, Zhanyuan, Zhao, Wei, Bai, Lichun, Fan, Jinglian
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical synthesis
Chemistry and Materials Science
Classical Mechanics
Colloiding
Crystallography and Scattering Methods
Ferrite
Grain size
Magnetic saturation
Materials Science
Metals & Corrosion
Molecular composites
Nitrates
Particle size
Polymer Sciences
Powder metallurgy
Precursors
Roasting
Solid Mechanics
Spherical powders
Spherical shells
Surfactants
Zeta potential
Zinc
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Summary:MnZn ferrite powders were prepared, based on the novel nano-in-situ composite method and through chemical sol–spray–calcination technology. Different dosage of CTAB were used, and the influences on the precursor sol solutions and precursor powders were studied. Also, the selected precursor powders (P-0.1CTAB) were calcined at 1060 °C in air for 3 h, and the sample (S-0.1CTAB) was considered to further exploration. The results indicated that the precursor sol and precursor powders were in their optimal state when adding 0.1 wt.% CTAB. Under this condition, the Zeta potential of the sol was 10.7 mV, and the colloidal particle size was 91.63 nm. The corresponding precursor powders can still maintain a nanoscale fine particle composition and be well dispersed. The S-0.1CTAB sample with hollow spherical shell composed of small particles of several hundred nanometers had pure MnZn ferrite phase, and the maximum value of saturation magnetization ( M s ) was 53.46 emu/g. Moreover, there are three stages of the formation of MnZn ferrite during the CTAB-assisted synthesis process which are CTAB ionization and (Mn, Zn, Fe)(OH)(NO 3 )(H 2 O) formation stage, CTA + adsorption and colloidal particle formation stage, and (Mn, Zn, Fe)(OH)(NO 3 )(H 2 O) decomposition stage.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-024-10313-3