Showing 2 results for Dielectric Properties.
Seyed Ebrahim Musavi Ghahfarokhi, Rahele Alikhani, Iraj Kazeminezhad,
Volume 25, Issue 3 (9-2017)
Abstract
In this research, PbFe11Co1O19 with annealing temperatures of 600, 700, 750, 800, 850 and 900 ˚C at annealing time of 3 h were synthesized by sol-gel method. The structural, microstructure properties and morphology of the samples have been studied by XRD, FT-IR and FESEM. Also, magnetic and dielectric properties of samples were characterized by VSM and LCR meter. The results of measurements of structural show that phase percentage of lead hexaferrite by increasing annealing temperature up to 800 ˚C increase and at annealing temperatures more than 800˚C percentage this phase decreases. The results of the magnetic measurements of samples reveal that by increasing annealing temperature and by eliminating the second phases, the saturation magnetization increases. Also, the results of dielectric reveal that by increasing frequency, dielectric constant and dielectric loss decreases which indicates that samples could be suitable for use in devices. The result measurements show that the best sample is PbFe11Co1 O19 with annealing temperature of 800 °C and 3 h.
Kobra Khodayari, Ahmad Gholizadeh, Haniyeh Hatefi,
Volume 32, Issue 4 (12-2024)
Abstract
Morphological and dielectric properties of (x)PbFe12O19/(1-x)Ni0.3Cu0.2Zn0.5Fe2O4 (x = 0, 6, 12, 30, 60, 100) nanocomposites have been investigated. The samples were analyzed using X-ray diffractometer, Field-emission scanning electron microscope and LCR meter. Increasing the porosity of samples by adding intermediate lead hexaferrite caused a decrease in the value of the real part of the dielectric constant. The obtained results show that the conduction process in the samples is dominant due to the charge carrier short-range motion which is explained by the small polaron hopping mechanism.
