Maca, Karel

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  • Maca, Karel (2)
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Author's Bibliography

Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics

Filipović, Suzana; Obradović, Nina; Pavlović, Vladimir B.; Mitrić, Miodrag; Đorđević, Antonije R.; Kachlik, M.; Maca, Karel

(Elsevier, 2016)

TY  - 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  - http://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 . .
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Advantages of Combined Sintering Compared to Conventional Sintering of Mechanically Activated Magnesium Titanate

Filipović, Suzana; Obradović, Nina; Pavlović, Vladimir B.; Kosanović, Darko; Mitrić, Miodrag; Mitrovic, N.; Pouchly, V.; Kachlik, M.; Maca, Karel

(2014)

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Pavlović, Vladimir B.
AU  - Kosanović, Darko
AU  - Mitrić, Miodrag
AU  - Mitrovic, N.
AU  - Pouchly, V.
AU  - Kachlik, M.
AU  - Maca, Karel
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/373
AB  - In this article, the advantages of combined sintering in comparison with the conventional one, of mechanically activated magnesium titanate ceramic were investigated. The stoichiometric mixtures of MgO and TiO2 were mechano-chemically activated for 0, 10, 40, 80 and 160 minutes by ball milling and then isostatically pressed (CIP) to form green bodies. Conventional sintering was realized by heating up to 1400 degrees C and hold for 30 minutes in air atmosphere. Resulting ceramic samples with closed porosity were post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 degrees C/3h in argon atmosphere with a pressure of 200 MPa. The best results were observed in the case of samples post-sintered by HIP, when single-phase MgTiO3 samples with relative density of 96% were prepared.
T2  - Science of Sintering
T1  - Advantages of Combined Sintering Compared to Conventional Sintering of Mechanically Activated Magnesium Titanate
VL  - 46
IS  - 3
SP  - 283
EP  - 290
DO  - 10.2298/SOS1403283F
ER  - 
@article{
author = "Filipović, Suzana and Obradović, Nina and Pavlović, Vladimir B. and Kosanović, Darko and Mitrić, Miodrag and Mitrovic, N. and Pouchly, V. and Kachlik, M. and Maca, Karel",
year = "2014",
abstract = "In this article, the advantages of combined sintering in comparison with the conventional one, of mechanically activated magnesium titanate ceramic were investigated. The stoichiometric mixtures of MgO and TiO2 were mechano-chemically activated for 0, 10, 40, 80 and 160 minutes by ball milling and then isostatically pressed (CIP) to form green bodies. Conventional sintering was realized by heating up to 1400 degrees C and hold for 30 minutes in air atmosphere. Resulting ceramic samples with closed porosity were post-sintered by pressure assisted technique Hot Isostatic Pressing (HIP) at 1280 degrees C/3h in argon atmosphere with a pressure of 200 MPa. The best results were observed in the case of samples post-sintered by HIP, when single-phase MgTiO3 samples with relative density of 96% were prepared.",
journal = "Science of Sintering",
title = "Advantages of Combined Sintering Compared to Conventional Sintering of Mechanically Activated Magnesium Titanate",
volume = "46",
number = "3",
pages = "283-290",
doi = "10.2298/SOS1403283F"
}
Filipović, S., Obradović, N., Pavlović, V. B., Kosanović, D., Mitrić, M., Mitrovic, N., Pouchly, V., Kachlik, M.,& Maca, K.. (2014). Advantages of Combined Sintering Compared to Conventional Sintering of Mechanically Activated Magnesium Titanate. in Science of Sintering, 46(3), 283-290.
https://doi.org/10.2298/SOS1403283F
Filipović S, Obradović N, Pavlović VB, Kosanović D, Mitrić M, Mitrovic N, Pouchly V, Kachlik M, Maca K. Advantages of Combined Sintering Compared to Conventional Sintering of Mechanically Activated Magnesium Titanate. in Science of Sintering. 2014;46(3):283-290.
doi:10.2298/SOS1403283F .
Filipović, Suzana, Obradović, Nina, Pavlović, Vladimir B., Kosanović, Darko, Mitrić, Miodrag, Mitrovic, N., Pouchly, V., Kachlik, M., Maca, Karel, "Advantages of Combined Sintering Compared to Conventional Sintering of Mechanically Activated Magnesium Titanate" in Science of Sintering, 46, no. 3 (2014):283-290,
https://doi.org/10.2298/SOS1403283F . .
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