Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics
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2016
Authors
Filipović, SuzanaObradović, N.
Pavlović, Vladimir
Mitrić, M.
Djordjević, Antonije
Kachlik, Martin
Maca, Karel
Article (Published version)
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Show full item recordAbstract
The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in a planetary ball mill. Green bodies were formed by an isostatic pressure of 300 MPa. The sintering of these samples was done either by the Two-Step Sintering (TSS) approach or by conventional pressureless sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 degrees C for 30 min and the next step was performed at 1200 degrees C for 20 h. The density of the obtained samples after the two-step sintering reached almost 90% of the theoretical density (%TD). The second set of compacts was sintered at 1400 degrees C for 30 min in air. The samples without open porosity were post-sintered by the HIP at 1200 degrees C for 2 h in an argon atmosphere at a pressure of 200 MPa. The density significantly increased up to 9...6%TD. The differences between samples prepared by these two techniques were also analyzed by XRD and SEM. The lattice vibration spectra were obtained using Raman spectroscopy and they indicate a high degree of lattice disorder, as well as high values of the oxygen vacancy concentration. Electrical characteristic were established in the frequency range from 10 kHz to 10 GHz. The choice of the processing route had considerable influence on structural and physical properties of MgTiO3 ceramics.
Keywords:
Milling / Sintering / Defects / Microstructure-final / Dielectric propertiesSource:
Ceramics International, 2016, 42, 8, 9887-9898Publisher:
- Elsevier Sci Ltd, Oxford
Funding / projects:
- Directed synthesis, structure and properties of multifunctional materials (RS-MESTD-Basic Research (BR or ON)-172057)
- Grant agency of the Czech RepublicGrant Agency of the Czech Republic [15-06390S]
- Ministry of Education, Youth and Sports of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic [LQ1601]
DOI: 10.1016/j.ceramint.2016.03.088
ISSN: 0272-8842
WoS: 000374811600074
Scopus: 2-s2.0-84977955873
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Institution/Community
Poljoprivredni fakultetTY - JOUR AU - Filipović, Suzana AU - Obradović, N. AU - Pavlović, Vladimir AU - Mitrić, M. AU - Djordjević, Antonije AU - Kachlik, Martin AU - Maca, Karel PY - 2016 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/4209 AB - The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in a planetary ball mill. Green bodies were formed by an isostatic pressure of 300 MPa. The sintering of these samples was done either by the Two-Step Sintering (TSS) approach or by conventional pressureless sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 degrees C for 30 min and the next step was performed at 1200 degrees C for 20 h. The density of the obtained samples after the two-step sintering reached almost 90% of the theoretical density (%TD). The second set of compacts was sintered at 1400 degrees C for 30 min in air. The samples without open porosity were post-sintered by the HIP at 1200 degrees C for 2 h in an argon atmosphere at a pressure of 200 MPa. The density significantly increased up to 96%TD. The differences between samples prepared by these two techniques were also analyzed by XRD and SEM. The lattice vibration spectra were obtained using Raman spectroscopy and they indicate a high degree of lattice disorder, as well as high values of the oxygen vacancy concentration. Electrical characteristic were established in the frequency range from 10 kHz to 10 GHz. The choice of the processing route had considerable influence on structural and physical properties of MgTiO3 ceramics. PB - Elsevier Sci Ltd, Oxford T2 - Ceramics International T1 - Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics EP - 9898 IS - 8 SP - 9887 VL - 42 DO - 10.1016/j.ceramint.2016.03.088 ER -
@article{ author = "Filipović, Suzana and Obradović, N. and Pavlović, Vladimir and Mitrić, M. and Djordjević, Antonije and Kachlik, Martin and Maca, Karel", year = "2016", abstract = "The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in a planetary ball mill. Green bodies were formed by an isostatic pressure of 300 MPa. The sintering of these samples was done either by the Two-Step Sintering (TSS) approach or by conventional pressureless sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 degrees C for 30 min and the next step was performed at 1200 degrees C for 20 h. The density of the obtained samples after the two-step sintering reached almost 90% of the theoretical density (%TD). The second set of compacts was sintered at 1400 degrees C for 30 min in air. The samples without open porosity were post-sintered by the HIP at 1200 degrees C for 2 h in an argon atmosphere at a pressure of 200 MPa. The density significantly increased up to 96%TD. The differences between samples prepared by these two techniques were also analyzed by XRD and SEM. The lattice vibration spectra were obtained using Raman spectroscopy and they indicate a high degree of lattice disorder, as well as high values of the oxygen vacancy concentration. Electrical characteristic were established in the frequency range from 10 kHz to 10 GHz. The choice of the processing route had considerable influence on structural and physical properties of MgTiO3 ceramics.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Ceramics International", title = "Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics", pages = "9898-9887", number = "8", volume = "42", doi = "10.1016/j.ceramint.2016.03.088" }
Filipović, S., Obradović, N., Pavlović, V., Mitrić, M., Djordjević, A., Kachlik, M.,& Maca, K.. (2016). Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics. in Ceramics International Elsevier Sci Ltd, Oxford., 42(8), 9887-9898. https://doi.org/10.1016/j.ceramint.2016.03.088
Filipović S, Obradović N, Pavlović V, Mitrić M, Djordjević A, Kachlik M, Maca K. Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics. in Ceramics International. 2016;42(8):9887-9898. doi:10.1016/j.ceramint.2016.03.088 .
Filipović, Suzana, Obradović, N., Pavlović, Vladimir, Mitrić, M., Djordjević, Antonije, Kachlik, Martin, Maca, Karel, "Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics" in Ceramics International, 42, no. 8 (2016):9887-9898, https://doi.org/10.1016/j.ceramint.2016.03.088 . .