The impedance analysis of sintered MgTiO3 ceramics
Authorized Users Only
2017
Authors
Filipović, Suzana
Pavlović, Vera P.

Obradović, Nina

Paunović, V.
Maca, Karel

Pavlović, Vladimir B.

Article (Published version)

Metadata
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:
AC impedance analysis / mechanical activation / SEM / titanate-based ceramicsSource:
Journal of Alloys and Compounds, 2017, 701, 107-115Publisher:
- Elsevier
Funding / projects:
DOI: 10.1016/j.jallcom.2017.01.117
ISSN: 0925-8388
WoS: 000395839100016
Scopus: 2-s2.0-85009868492
URI
http://www.sciencedirect.com/science/article/pii/S0925838817301408https://dais.sanu.ac.rs/123456789/4691
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Filipović, Suzana AU - Pavlović, Vera P. AU - Obradović, Nina AU - Paunović, V. AU - Maca, Karel AU - Pavlović, Vladimir B. PY - 2017 UR - http://www.sciencedirect.com/science/article/pii/S0925838817301408 UR - https://dais.sanu.ac.rs/123456789/4691 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 T2 - Journal of Alloys and Compounds T1 - The impedance analysis of sintered MgTiO3 ceramics SP - 107 EP - 115 VL - 701 DO - 10.1016/j.jallcom.2017.01.117 UR - https://hdl.handle.net/21.15107/rcub_dais_4691 ER -
@article{ author = "Filipović, Suzana and Pavlović, Vera P. and Obradović, Nina and Paunović, V. 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", journal = "Journal of Alloys and Compounds", title = "The impedance analysis of sintered MgTiO3 ceramics", pages = "107-115", volume = "701", doi = "10.1016/j.jallcom.2017.01.117", url = "https://hdl.handle.net/21.15107/rcub_dais_4691" }
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., 701, 107-115. https://doi.org/10.1016/j.jallcom.2017.01.117 https://hdl.handle.net/21.15107/rcub_dais_4691
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 https://hdl.handle.net/21.15107/rcub_dais_4691 .
Filipović, Suzana, Pavlović, Vera P., Obradović, Nina, Paunović, V., 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 ., https://hdl.handle.net/21.15107/rcub_dais_4691 .