The impedance analysis of sintered MgTiO3 ceramics
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2017
Authors
Filipović, SuzanaPavlović, Vera P.
Obradović, Nina
Paunović, Vesna
Maca, Karel
Pavlović, Vladimir B.
Article (Published version)
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Show full item recordAbstract
In the present study the effect of preparation conditions on microstructure and electrical properties of MgTiO3 ceramics was investigated. Mixture of MgO and TiO2 powders was subjected to mechanical activation for different time periods. Two types of sintering (two-step and HIP sintering) were performed on green bodies prepared by cold isostatic pressing. AC impedance spectroscopy in the low-frequency range (from 20 Hz to 1 MHz), at room and elevated temperatures, were performed in order to separate contribution of grains and grain boundaries to capacitance, resistance and conductivity of magnesium titanate ceramics. The special attention was directed to explanation of the influence of mechanical activation on electrical and morphological changes in sintered samples. The significant decrease of partial oxygen pressure in HP sintering atmosphere caused the change from insulating behavior of MgTiO3 samples after two-step sintering to semiconducting one.
Keywords:
Titanate-based ceramics / SEM / Mechanical activation / AC impedance analysisSource:
Journal of Alloys and Compounds, 2017, 701, 107-115Publisher:
- Elsevier Science Sa, Lausanne
Funding / projects:
- Directed synthesis, structure and properties of multifunctional materials (RS-MESTD-Basic Research (BR or ON)-172057)
Note:
- Peer reviewed version of the article: https://machinery.mas.bg.ac.rs/handle/123456789/4071
Related info:
DOI: 10.1016/j.jallcom.2017.01.117
ISSN: 0925-8388
WoS: 000395839100016
Scopus: 2-s2.0-85009868492
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Mašinski fakultetTY - JOUR AU - Filipović, Suzana AU - Pavlović, Vera P. AU - Obradović, Nina AU - Paunović, Vesna AU - Maca, Karel AU - Pavlović, Vladimir B. PY - 2017 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2573 AB - In the present study the effect of preparation conditions on microstructure and electrical properties of MgTiO3 ceramics was investigated. Mixture of MgO and TiO2 powders was subjected to mechanical activation for different time periods. Two types of sintering (two-step and HIP sintering) were performed on green bodies prepared by cold isostatic pressing. AC impedance spectroscopy in the low-frequency range (from 20 Hz to 1 MHz), at room and elevated temperatures, were performed in order to separate contribution of grains and grain boundaries to capacitance, resistance and conductivity of magnesium titanate ceramics. The special attention was directed to explanation of the influence of mechanical activation on electrical and morphological changes in sintered samples. The significant decrease of partial oxygen pressure in HP sintering atmosphere caused the change from insulating behavior of MgTiO3 samples after two-step sintering to semiconducting one. PB - Elsevier Science Sa, Lausanne T2 - Journal of Alloys and Compounds T1 - The impedance analysis of sintered MgTiO3 ceramics EP - 115 SP - 107 VL - 701 DO - 10.1016/j.jallcom.2017.01.117 ER -
@article{ author = "Filipović, Suzana and Pavlović, Vera P. and Obradović, Nina and Paunović, Vesna and Maca, Karel and Pavlović, Vladimir B.", year = "2017", abstract = "In the present study the effect of preparation conditions on microstructure and electrical properties of MgTiO3 ceramics was investigated. Mixture of MgO and TiO2 powders was subjected to mechanical activation for different time periods. Two types of sintering (two-step and HIP sintering) were performed on green bodies prepared by cold isostatic pressing. AC impedance spectroscopy in the low-frequency range (from 20 Hz to 1 MHz), at room and elevated temperatures, were performed in order to separate contribution of grains and grain boundaries to capacitance, resistance and conductivity of magnesium titanate ceramics. The special attention was directed to explanation of the influence of mechanical activation on electrical and morphological changes in sintered samples. The significant decrease of partial oxygen pressure in HP sintering atmosphere caused the change from insulating behavior of MgTiO3 samples after two-step sintering to semiconducting one.", publisher = "Elsevier Science Sa, Lausanne", journal = "Journal of Alloys and Compounds", title = "The impedance analysis of sintered MgTiO3 ceramics", pages = "115-107", volume = "701", doi = "10.1016/j.jallcom.2017.01.117" }
Filipović, S., Pavlović, V. P., Obradović, N., Paunović, V., Maca, K.,& Pavlović, V. B.. (2017). The impedance analysis of sintered MgTiO3 ceramics. in Journal of Alloys and Compounds Elsevier Science Sa, Lausanne., 701, 107-115. https://doi.org/10.1016/j.jallcom.2017.01.117
Filipović S, Pavlović VP, Obradović N, Paunović V, Maca K, Pavlović VB. The impedance analysis of sintered MgTiO3 ceramics. in Journal of Alloys and Compounds. 2017;701:107-115. doi:10.1016/j.jallcom.2017.01.117 .
Filipović, Suzana, Pavlović, Vera P., Obradović, Nina, Paunović, Vesna, Maca, Karel, Pavlović, Vladimir B., "The impedance analysis of sintered MgTiO3 ceramics" in Journal of Alloys and Compounds, 701 (2017):107-115, https://doi.org/10.1016/j.jallcom.2017.01.117 . .