Influence of mechanical activation on functional properties of barium hexaferrite ceramics
Samo za registrovane korisnike
2018
Autori
Kosanović, DarkoBlagojević, Vladimir A.
Maričić, Aleksa
Aleksić, S.
Pavlović, Vera P.
Pavlović, Vladimir B.
Vlahović, Branislav
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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 degrees 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 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-...420 degrees 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 degrees 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.
Ključne reči:
Sintering / Milling / Magnetic properties / Electrical propertiesIzvor:
Ceramics International, 2018, 44, 6, 6666-6672Izdavač:
- Elsevier Sci Ltd, Oxford
Finansiranje / projekti:
- Usmerena sinteza, struktura i svojstva multifunkcionalnih materijala (RS-MESTD-Basic Research (BR or ON)-172057)
- Serbian Academy of Sciences and Arts [F/198]
- NSF CREST [HRD-0833184]
- NASA [NNX09AV07A]
- NSF-PREM 1523617
Napomena:
- Peer reviewed version of the paper: https://machinery.mas.bg.ac.rs/handle/123456789/3947
Povezane informacije:
- Druga verzija
https://machinery.mas.bg.ac.rs/handle/123456789/3947
DOI: 10.1016/j.ceramint.2018.01.078
ISSN: 0272-8842
WoS: 000427215100114
Scopus: 2-s2.0-85041099081
Kolekcije
Institucija/grupa
Mašinski fakultetTY - 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://machinery.mas.bg.ac.rs/handle/123456789/2932 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 degrees 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 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-420 degrees 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 degrees 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. PB - Elsevier Sci Ltd, Oxford T2 - Ceramics International T1 - Influence of mechanical activation on functional properties of barium hexaferrite ceramics EP - 6672 IS - 6 SP - 6666 VL - 44 DO - 10.1016/j.ceramint.2018.01.078 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 degrees 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 degrees C are superior to those sintered at 1100 degrees C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350-420 degrees 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 degrees 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.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Ceramics International", title = "Influence of mechanical activation on functional properties of barium hexaferrite ceramics", pages = "6672-6666", number = "6", volume = "44", doi = "10.1016/j.ceramint.2018.01.078" }
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 Sci Ltd, Oxford., 44(6), 6666-6672. https://doi.org/10.1016/j.ceramint.2018.01.078
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 .
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 . .