研究目的
Investigating the structural and microstructural properties of Sr3Co2Fe24O41 in bulk form and as thick films prepared by sol-gel auto-combustion method.
研究成果
Sr3Co2Fe24O41 was successfully synthesized with the main Z-type hexaferrite phase and secondary phases. The bulk samples showed texturing without an external magnetic field, making them suitable for thin film deposition techniques. The thick films exhibited roughness and porosity, with particles showing perfect hexagonal shapes.
研究不足
The presence of second phases (CoFe2O4 and Sr3Fe2O7-x) in the bulk samples and the roughness and porosity of the thick films.
1：Experimental Design and Method Selection:
The study utilized the sol-gel auto-combustion method for preparing Sr3Co2Fe24O41 powders, followed by synthesis into bulk pellets at 1200 oC and deposition into thick films from a suspension.
2：Sample Selection and Data Sources:
Precursor powders were prepared from metal nitrates and citric acid solution, with samples characterized using XRD and SEM.
3：List of Experimental Equipment and Materials:
Philips ESEM XL30 FEG for SEM, X-ray diffraction analysis with Cu-Kα radiation.
4：Experimental Procedures and Operational Workflow:
The gel was dehydrated, auto-combusted, annealed, and then pressed into pellets or used to prepare thick films.
5：Data Analysis Methods:
XRD spectra analysis for phase identification and SEM for microstructural examination.
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