The influence of mechanical activation on the formation, sintering kinetics and morphology was investigated in sintered barium strontium titanate (BST) ceramics with different Ba-to-Sr ratios. Initial powders were mechanically activated for 20 and 120 min, leading to mechano-chemical reaction and formation of BaxSr1-xTiO3 phases. Agglomeration was found to represent an important factor in the process of formation of BaxSr1-xTiO3 phases around 800 oC and during sintering. It reduces the effectiveness of mechanical activation on formation of BaxSr1-xTiO3 phases beyond the short period (20 min), while in the process of sintering, prolonged mechanical activation (120 min) leads to a significant reduction in sintering temperature and the corresponding value of activation energy. In addition, all three systems show a phase transformation around 1100 oC, attributed to the hexagonal-to-cubic phase transition. Morphology of the final sintered ceramics can be correlated primarily with the state ...of the pre-sintered powder, where mechanically activated powders with smaller particle size produced more compact and less porous final product.
Keywords:
ceramics / sintering kinetics / SEM / phase transition
TY - JOUR
AU - Kosanović, Darko
AU - Labus, Nebojša
AU - Živojinović, Jelena
AU - Peleš Tadić, Adriana
AU - Blagojević, Vladimir A.
AU - Pavlović, Vladimir B.
PY - 2020
UR - https://dais.sanu.ac.rs/123456789/10039
AB - The influence of mechanical activation on the formation, sintering kinetics and morphology was investigated in sintered barium strontium titanate (BST) ceramics with different Ba-to-Sr ratios. Initial powders were mechanically activated for 20 and 120 min, leading to mechano-chemical reaction and formation of BaxSr1-xTiO3 phases. Agglomeration was found to represent an important factor in the process of formation of BaxSr1-xTiO3 phases around 800 oC and during sintering. It reduces the effectiveness of mechanical activation on formation of BaxSr1-xTiO3 phases beyond the short period (20 min), while in the process of sintering, prolonged mechanical activation (120 min) leads to a significant reduction in sintering temperature and the corresponding value of activation energy. In addition, all three systems show a phase transformation around 1100 oC, attributed to the hexagonal-to-cubic phase transition. Morphology of the final sintered ceramics can be correlated primarily with the state of the pre-sintered powder, where mechanically activated powders with smaller particle size produced more compact and less porous final product.
PB - Belgrade : ETRAN
T2 - Science of Sintering
T1 - Effects of Mechanical Activation on the Formation and Sintering Kinetics of Barium Strontium Titanate Ceramics
SP - 371
EP - 385
VL - 52
IS - 4
DO - 10.2298/SOS2004371K
ER -
@article{
author = "Kosanović, Darko and Labus, Nebojša and Živojinović, Jelena and Peleš Tadić, Adriana and Blagojević, Vladimir A. and Pavlović, Vladimir B.",
year = "2020",
url = "https://dais.sanu.ac.rs/123456789/10039",
abstract = "The influence of mechanical activation on the formation, sintering kinetics and morphology was investigated in sintered barium strontium titanate (BST) ceramics with different Ba-to-Sr ratios. Initial powders were mechanically activated for 20 and 120 min, leading to mechano-chemical reaction and formation of BaxSr1-xTiO3 phases. Agglomeration was found to represent an important factor in the process of formation of BaxSr1-xTiO3 phases around 800 oC and during sintering. It reduces the effectiveness of mechanical activation on formation of BaxSr1-xTiO3 phases beyond the short period (20 min), while in the process of sintering, prolonged mechanical activation (120 min) leads to a significant reduction in sintering temperature and the corresponding value of activation energy. In addition, all three systems show a phase transformation around 1100 oC, attributed to the hexagonal-to-cubic phase transition. Morphology of the final sintered ceramics can be correlated primarily with the state of the pre-sintered powder, where mechanically activated powders with smaller particle size produced more compact and less porous final product.",
publisher = "Belgrade : ETRAN",
journal = "Science of Sintering",
title = "Effects of Mechanical Activation on the Formation and Sintering Kinetics of Barium Strontium Titanate Ceramics",
pages = "371-385",
volume = "52",
number = "4",
doi = "10.2298/SOS2004371K"
}
Kosanović D, Labus N, Živojinović J, Peleš Tadić A, Blagojević VA, Pavlović VB. Effects of Mechanical Activation on the Formation and Sintering Kinetics of Barium Strontium Titanate Ceramics. Science of Sintering. 2020;52(4):371-385
Kosanović, D., Labus, N., Živojinović, J., Peleš Tadić, A., Blagojević, V. A.,& Pavlović, V. B. (2020). Effects of Mechanical Activation on the Formation and Sintering Kinetics of Barium Strontium Titanate Ceramics.
Science of SinteringBelgrade : ETRAN., 52(4), 371-385.
https://doi.org/10.2298/SOS2004371K
Kosanović Darko, Labus Nebojša, Živojinović Jelena, Peleš Tadić Adriana, Blagojević Vladimir A., Pavlović Vladimir B., "Effects of Mechanical Activation on the Formation and Sintering Kinetics of Barium Strontium Titanate Ceramics" 52, no. 4 (2020):371-385,
https://doi.org/10.2298/SOS2004371K .
