Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics
Само за регистроване кориснике
2016
Аутори
Filipović, SuzanaObradović, Nina
Pavlović, Vladimir B.
Mitrić, Miodrag
Đorđević, Antonije R.
Kachlik, M.
Maca, Karel
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Кључне речи:
Milling / Sintering / Defects / Microstructure-final / Dielectric propertiesИзвор:
Ceramics International, 2016, 42, 8, 9887-9898Издавач:
- Elsevier
Финансирање / пројекти:
- Усмерена синтеза, структура и својства мултифункционалних материјала (RS-172057)
- Grant agency of the Czech Republic [15-06390S], Ministry of Education, Youth and Sports of the Czech Republic [LQ1601]
DOI: 10.1016/j.ceramint.2016.03.088
ISSN: 0272-8842; 1873-3956
WoS: 000374811600074
Scopus: 2-s2.0-84977955873
Колекције
Институција/група
VinčaTY - JOUR AU - Filipović, Suzana AU - Obradović, Nina AU - Pavlović, Vladimir B. AU - Mitrić, Miodrag AU - Đorđević, Antonije R. AU - Kachlik, M. AU - Maca, Karel PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1037 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. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. PB - Elsevier T2 - Ceramics International T1 - Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics VL - 42 IS - 8 SP - 9887 EP - 9898 DO - 10.1016/j.ceramint.2016.03.088 ER -
@article{ author = "Filipović, Suzana and Obradović, Nina and Pavlović, Vladimir B. and Mitrić, Miodrag and Đorđević, Antonije R. and Kachlik, M. 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. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.", publisher = "Elsevier", journal = "Ceramics International", title = "Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics", volume = "42", number = "8", pages = "9887-9898", doi = "10.1016/j.ceramint.2016.03.088" }
Filipović, S., Obradović, N., Pavlović, V. B., Mitrić, M., Đorđević, A. R., Kachlik, M.,& Maca, K.. (2016). Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics. in Ceramics International Elsevier., 42(8), 9887-9898. https://doi.org/10.1016/j.ceramint.2016.03.088
Filipović S, Obradović N, Pavlović VB, Mitrić M, Đorđević AR, 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, Nina, Pavlović, Vladimir B., Mitrić, Miodrag, Đorđević, Antonije R., Kachlik, M., 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 . .