Abstract
초록·키워드 목차 오류제보하기 Cobalt ferrite nanoparticles (CoFe₂O₄) and cobalt zinc ferrites with general formula CoxZn1-xFe₂O₄ (x = 0.5, 0.6, 0.7) were prepared by sol-gel method at a low temperature with a final pH value of 7. Synthesized spinel ferrites were sintered at various temperatures (220, 400, 600, 800 and 1000℃). X-ray diffraction (XRD) was used to characterize the sizes of particles and structural properties. The average crystalline size of the prepared ferrite was ranged between 18-49 nm. The FTIR spectra however showed two strong absorption bands ranged between (1037.45-399.26 cm−1), which is a spinel ferrite. The study also focused on several dielectric properties of the samples such as dielectric constant (ε" ), dielectric loss tangent (tan δ) and complex dielectric constant (ε"" ). The variation of dielectric parameters (ε) and tanδ with frequency revealed that the dispersion was due to Maxwell-Wagner. Magnetization measurements showed that the coactivity (Hc), saturation magnetization (Ms), remanent magnetization (Mr) and squarenessremnance ratio (R = Mr/Ms) strongly depend on content of zinc. #Sol-gel synthesis #Co-Zn ferrites #dielectric #magnetic properties 1. Introduction2. Experimental Method3. Results and Discussion4. ConclusionReferences
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