Синтез і характеристика структури і електричних властивостей Mg(0,25x)Cu(0,25x)Zn(1 – 5x)Fe2O4 феритів золь-гель методом

• Дата: 2019
• Автори: Shahjahan, M., Talukder, S. M., Hossain, M. S., Begum, M. H. A., Warnock, R. L., Haque, M. A., Hossain, M., Ahmed, N. A.
• Формат: Стаття
• Мова: English
• Опубліковано: Publishing house "Academperiodika" 2019
• Онлайн доступ: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018732
• Назва журналу: Ukrainian Journal of Physics

The effects of magnesium, copper, and zinc substitutions on spinel ferrites have been investigated by the sol-gel technique. Ferrite compositions of Mg0,25xCu0,25xZn(1−0,5x)Fe2O4 (where x = 0.6, 0.7, 0.8 & 0.9) were prepared at a sintering temperature of 1100 ∘C with a presintering at 500 ∘C. X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-precision impedance analysis are used to characterize structural and dielectric properties, as well as the surface topography and morphology of the samples. A single phase, cubic spinel structure, with decreased lattice constant was observed. SEM micrographs revealed a homogeneous microstructure with uniform size distributions. Both the dielectric constant and dielectric loss tangent decrease, as the incident frequency increases up to a certain saturation point. The direct current (dc) resistivity profile shows that the resistivity increases with the temperature up to the Curie point, then it goes to a constant value. The quality factor (Q-factor) increases with the incident frequency. Hence, the high Q-factor will make ferrites highly useful in applications, especially in multilayer chip inductors.