The impedance analysis of sintered MgTiO3 ceramics
2017
Аутори
Filipović, SuzanaPavlović, Vera P.
Obradović, N.
Paunović, V.
Maca, Karel
Pavlović, Vladimir
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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.
Кључне речи:
Mechanical activation / AC impedance analysis / SEM / Titanate-based ceramicsИзвор:
Journal of Alloys and Compounds, 2017, 701, 107-115Издавач:
- Elsevier Science Sa, Lausanne
Финансирање / пројекти:
- Усмерена синтеза, структура и својства мултифункционалних материјала (RS-MESTD-Basic Research (BR or ON)-172057)
DOI: 10.1016/j.jallcom.2017.01.117
ISSN: 0925-8388
WoS: 000395839100016
Scopus: 2-s2.0-85009868492
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Filipović, Suzana AU - Pavlović, Vera P. AU - Obradović, N. AU - Paunović, V. AU - Maca, Karel AU - Pavlović, Vladimir PY - 2017 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/4393 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, N. and Paunović, V. and Maca, Karel and Pavlović, Vladimir", 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.. (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 V. 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, N., Paunović, V., Maca, Karel, Pavlović, Vladimir, "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 . .