The effects of Zn-doping on the dielectric behavior and electrical properties of bulk alpha-Fe2O3 have been studied. X-ray diffraction analysis revealed the presence of two phases in all samples: hematite and spinel ZnFe2O4, with the amount of spinel phase increasing with increasing Zn content. Scanning electron microscopy analysis combined with energy dispersive X-ray spectroscopy showed that the Zn-bearing phase occurred in the form of individual spinel ZnFe2O4 grains in a hematite matrix. DC conductivity was measured in the temperature range 25-225 degrees C (298-498 K). Impedance spectroscopy measurements in the same temperature range were carried out in the frequency range 100Hz to 10 MHz. Increase in the Zn content resulted in increased electrical conductivity and higher values of the dielectric constant. The resistance and capacitance of grains and grain boundaries were analyzed by modeling the experimental results using an equivalent circuit.
Keywords:
X-ray diffraction / Scanning electron microscopy / Electrical transport / Dielectric response
Source:
Science of Sintering, 2012, 44, 3, 307-321
Publisher:
Međunarodni Institut za nauku o sinterovanju, Beograd
TY - JOUR
AU - Nikolić, Maria Vesna
AU - Slankamenac, Milos P
AU - Nikolić, Nenad
AU - Sekulic, Dalibor L
AU - Aleksić, Obrad
AU - Mitric, Miodrag
AU - Ivetić, Tamara B.
AU - Pavlović, Vladimir B
AU - Nikolić, Pantelija M.
PY - 2012
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/557
AB - The effects of Zn-doping on the dielectric behavior and electrical properties of bulk alpha-Fe2O3 have been studied. X-ray diffraction analysis revealed the presence of two phases in all samples: hematite and spinel ZnFe2O4, with the amount of spinel phase increasing with increasing Zn content. Scanning electron microscopy analysis combined with energy dispersive X-ray spectroscopy showed that the Zn-bearing phase occurred in the form of individual spinel ZnFe2O4 grains in a hematite matrix. DC conductivity was measured in the temperature range 25-225 degrees C (298-498 K). Impedance spectroscopy measurements in the same temperature range were carried out in the frequency range 100Hz to 10 MHz. Increase in the Zn content resulted in increased electrical conductivity and higher values of the dielectric constant. The resistance and capacitance of grains and grain boundaries were analyzed by modeling the experimental results using an equivalent circuit.
PB - Međunarodni Institut za nauku o sinterovanju, Beograd
T2 - Science of Sintering
T1 - Study of Dielectric Behavior and Electrical Properties of Hematite alpha-Fe2O3 Doped with Zn
EP - 321
IS - 3
SP - 307
VL - 44
DO - 10.2298/SOS1203307N
ER -
@article{
author = "Nikolić, Maria Vesna and Slankamenac, Milos P and Nikolić, Nenad and Sekulic, Dalibor L and Aleksić, Obrad and Mitric, Miodrag and Ivetić, Tamara B. and Pavlović, Vladimir B and Nikolić, Pantelija M.",
year = "2012",
abstract = "The effects of Zn-doping on the dielectric behavior and electrical properties of bulk alpha-Fe2O3 have been studied. X-ray diffraction analysis revealed the presence of two phases in all samples: hematite and spinel ZnFe2O4, with the amount of spinel phase increasing with increasing Zn content. Scanning electron microscopy analysis combined with energy dispersive X-ray spectroscopy showed that the Zn-bearing phase occurred in the form of individual spinel ZnFe2O4 grains in a hematite matrix. DC conductivity was measured in the temperature range 25-225 degrees C (298-498 K). Impedance spectroscopy measurements in the same temperature range were carried out in the frequency range 100Hz to 10 MHz. Increase in the Zn content resulted in increased electrical conductivity and higher values of the dielectric constant. The resistance and capacitance of grains and grain boundaries were analyzed by modeling the experimental results using an equivalent circuit.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Study of Dielectric Behavior and Electrical Properties of Hematite alpha-Fe2O3 Doped with Zn",
pages = "321-307",
number = "3",
volume = "44",
doi = "10.2298/SOS1203307N"
}
Nikolić, M. V., Slankamenac, M. P., Nikolić, N., Sekulic, D. L., Aleksić, O., Mitric, M., Ivetić, T. B., Pavlović, V. B.,& Nikolić, P. M.. (2012). Study of Dielectric Behavior and Electrical Properties of Hematite alpha-Fe2O3 Doped with Zn. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 44(3), 307-321.
https://doi.org/10.2298/SOS1203307N
Nikolić MV, Slankamenac MP, Nikolić N, Sekulic DL, Aleksić O, Mitric M, Ivetić TB, Pavlović VB, Nikolić PM. Study of Dielectric Behavior and Electrical Properties of Hematite alpha-Fe2O3 Doped with Zn. in Science of Sintering. 2012;44(3):307-321.
doi:10.2298/SOS1203307N .
Nikolić, Maria Vesna, Slankamenac, Milos P, Nikolić, Nenad, Sekulic, Dalibor L, Aleksić, Obrad, Mitric, Miodrag, Ivetić, Tamara B., Pavlović, Vladimir B, Nikolić, Pantelija M., "Study of Dielectric Behavior and Electrical Properties of Hematite alpha-Fe2O3 Doped with Zn" in Science of Sintering, 44, no. 3 (2012):307-321,
https://doi.org/10.2298/SOS1203307N . .
