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Influence of mechanical activation on functional properties of barium hexaferrite ceramics

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2018
kosanovi2018.pdf (1.537Mb)
Authors
Kosanović, Darko
Blagojević, Vladimir A.
Maričić, Aleksa
Aleksić, S.
Pavlović, Vera P.
Pavlović, Vladimir B.
Vlahović, Branislav
Article (Accepted Version)
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Abstract
Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100–240 min) and sintered at 1100 and 1200 °C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84–89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 °C are superior to those sintered at 1100 °C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350–420 °C temperature re...gion is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 °C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min. © 2018 Elsevier Ltd and Techna Group S.r.l.

Keywords:
milling / sintering / electrical properties / magnetic properties
Source:
Ceramics International, 2018, 44, 6, 6666-6672
Publisher:
  • Elsevier
Funding / projects:
  • United States National Aeronautics and Space Administration (NASA), Grant NNX09AV07A
  • Directed synthesis, structure and properties of multifunctional materials (RS-172057)
  • Serbian Academy of Sciences and Arts, Project F-178
  • United States National Science Foundation (NSF) / Centers of Research Excellence in Science and Technology (CREST), Grant HRD-0833184
  • United States National Science Foundation (NSF) / Partnerships for Research and Education in Materials (PREM), Grant 1523617
Note:
  • Supporting information: https://hdl.handle.net/21.15107/rcub_dais_3788
  • This is the peer reviewed version of the article: Kosanović, D., Blagojević, V.A., Maričić, A., Aleksić, S., Pavlović, V.P., Pavlović, V.B., Vlahović, B., 2018. Influence of mechanical activation on functional properties of barium hexaferrite ceramics. Ceramics International 44, 6666–6672. https://doi.org/10.1016/j.ceramint.2018.01.078
  • Published version: https://hdl.handle.net/21.15107/rcub_dais_3742
Related info:
  • Version of
    https://hdl.handle.net/21.15107/rcub_dais_3742
  • Version of
    http://dx.doi.org/10.1016/j.ceramint.2018.01.078
  • Referenced by
    https://hdl.handle.net/21.15107/rcub_dais_3788

DOI: 10.1016/j.ceramint.2018.01.078

ISSN: 0272-8842

WoS: 000427215100114

Scopus: 2-s2.0-85041099081
[ Google Scholar ]
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Handle
https://hdl.handle.net/21.15107/rcub_dais_4606
URI
https://dais.sanu.ac.rs/123456789/4606
Collections
  • Општа колекција САНУ / General collection of SASA
  • ИТН САНУ - Општа колекција / ITS SASA - General collection
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASA
TY  - JOUR
AU  - Kosanović, Darko
AU  - Blagojević, Vladimir A.
AU  - Maričić, Aleksa
AU  - Aleksić, S.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4606
AB  - Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100–240 min) and sintered at 1100 and 1200 °C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84–89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 °C are superior to those sintered at 1100 °C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350–420 °C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 °C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min. © 2018 Elsevier Ltd and Techna Group S.r.l.
PB  - Elsevier
T2  - Ceramics International
T1  - Influence of mechanical activation on functional properties of barium hexaferrite ceramics
SP  - 6666
EP  - 6672
VL  - 44
IS  - 6
DO  - 10.1016/j.ceramint.2018.01.078
UR  - https://hdl.handle.net/21.15107/rcub_dais_4606
ER  - 
@article{
author = "Kosanović, Darko and Blagojević, Vladimir A. and Maričić, Aleksa and Aleksić, S. and Pavlović, Vera P. and Pavlović, Vladimir B. and Vlahović, Branislav",
year = "2018",
abstract = "Barium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100–240 min) and sintered at 1100 and 1200 °C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84–89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 °C are superior to those sintered at 1100 °C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350–420 °C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 °C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min. © 2018 Elsevier Ltd and Techna Group S.r.l.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Influence of mechanical activation on functional properties of barium hexaferrite ceramics",
pages = "6666-6672",
volume = "44",
number = "6",
doi = "10.1016/j.ceramint.2018.01.078",
url = "https://hdl.handle.net/21.15107/rcub_dais_4606"
}
Kosanović, D., Blagojević, V. A., Maričić, A., Aleksić, S., Pavlović, V. P., Pavlović, V. B.,& Vlahović, B.. (2018). Influence of mechanical activation on functional properties of barium hexaferrite ceramics. in Ceramics International
Elsevier., 44(6), 6666-6672.
https://doi.org/10.1016/j.ceramint.2018.01.078
https://hdl.handle.net/21.15107/rcub_dais_4606
Kosanović D, Blagojević VA, Maričić A, Aleksić S, Pavlović VP, Pavlović VB, Vlahović B. Influence of mechanical activation on functional properties of barium hexaferrite ceramics. in Ceramics International. 2018;44(6):6666-6672.
doi:10.1016/j.ceramint.2018.01.078
https://hdl.handle.net/21.15107/rcub_dais_4606 .
Kosanović, Darko, Blagojević, Vladimir A., Maričić, Aleksa, Aleksić, S., Pavlović, Vera P., Pavlović, Vladimir B., Vlahović, Branislav, "Influence of mechanical activation on functional properties of barium hexaferrite ceramics" in Ceramics International, 44, no. 6 (2018):6666-6672,
https://doi.org/10.1016/j.ceramint.2018.01.078 .,
https://hdl.handle.net/21.15107/rcub_dais_4606 .

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