研究目的
Investigating the structural, infrared, magnetic, and electrical properties of Ni0.6Cd0.2Cu0.2Fe2O4 ferrites synthesized using the sol-gel method under different sintering temperatures.
研究成果
The study successfully synthesized Ni0.6Cd0.2Cu0.2Fe2O4 ferrites with cubic spinel structure. Increasing sintering temperature improved lattice constant, crystallite size, magnetization, and conductivity. Dielectric properties decreased with frequency, and conduction was primarily due to grain boundary effects. The materials show promise for high-frequency applications.
研究不足
The study is limited to the characterization of Ni0.6Cd0.2Cu0.2Fe2O4 ferrites under specific sintering temperatures. The frequency range for impedance spectroscopy was limited to 100 Hz–1 MHz, which may not capture all grain contributions.
1：Experimental Design and Method Selection:
The sol-gel method was used to prepare Ni0.6Cd0.2Cu0.2Fe2O4 ferrites. The samples were sintered at different temperatures (900 °C, 1000 °C, 1100 °C, and 1200 °C).
2：6Cd2Cu2Fe2O4 ferrites. The samples were sintered at different temperatures (900 °C, 1000 °C, 1100 °C, and 1200 °C).
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Stoichiometric amounts of metal nitrates were used as precursors. The samples were characterized using SEM, XRD, FTIR, VSM, and impedance spectroscopy.
3：List of Experimental Equipment and Materials:
Philips XL30 SEM, Panalytical X’Pert Pro XRD, Shimadzu FTIR-8400S, VSM, N4L-NumeriQ PSM1735 impedance analyzer.
4：Experimental Procedures and Operational Workflow:
The synthesis involved mixing metal nitrates with citric acid, drying, grinding, and sintering at specified temperatures. Characterization was performed at room temperature.
5：Data Analysis Methods:
XRD data were analyzed using Rietveld refinement with FullProf software. Conductivity and dielectric properties were modeled using Jonscher power law and Maxwell's interfacial polarization theory, respectively.
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