Alumina/YAG composites (AYX_t) with high relative density (99.2 %TD) were successfully obtained by mixing commercial alumina powder with different volume fractions of yttrium aluminium garnet (Y3Al5O12-YAG; 7, 14, 21 and 28). YAG was synthetized by nitrate glycine reaction in the form of precursor powder. Polycrystalline YAG powder was obtained by calcination at 950 degrees C for 2 h. Additionally, obtained compositions were characterized by XRD, SEM, EDX and electrochemical impedance spectroscopy. By XRPD analysis was found that the particle size of YAG powders lies in the nanometric range (being lower than 35 nm). By SEM microphotographs of composites were confirmed the formation of a conductive path consisting from mutually interconnected YAG particles. This was confirmed by the electrochemical impedance spectroscopy. The highest electrical conductivity of grain (K-g) and grain boundary (K-gb) at 700 degrees C amounted to 2.22x10(-2) ohm(-1)cm(-1) and 9.44x10(-3) ohm(-1) cm(-1), res...pectively, was measured in the composite containing 21 vol% of YAG.
Keywords:
Al2O3-YAG / Composites / Electrical conductivity
Source:
Science of Sintering, 2018, 50, 3, 357-369
Publisher:
Međunarodni Institut za nauku o sinterovanju, Beograd
TY - JOUR
AU - Egelja, Adela
AU - Pašalić, Snežana
AU - Dodevski, Vladimir
AU - Kragović, Milan M.
AU - Stojković-Simatović, Ivana
AU - Radovanović, Željko
AU - Stojmenović, Marija
PY - 2018
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3898
AB - Alumina/YAG composites (AYX_t) with high relative density (99.2 %TD) were successfully obtained by mixing commercial alumina powder with different volume fractions of yttrium aluminium garnet (Y3Al5O12-YAG; 7, 14, 21 and 28). YAG was synthetized by nitrate glycine reaction in the form of precursor powder. Polycrystalline YAG powder was obtained by calcination at 950 degrees C for 2 h. Additionally, obtained compositions were characterized by XRD, SEM, EDX and electrochemical impedance spectroscopy. By XRPD analysis was found that the particle size of YAG powders lies in the nanometric range (being lower than 35 nm). By SEM microphotographs of composites were confirmed the formation of a conductive path consisting from mutually interconnected YAG particles. This was confirmed by the electrochemical impedance spectroscopy. The highest electrical conductivity of grain (K-g) and grain boundary (K-gb) at 700 degrees C amounted to 2.22x10(-2) ohm(-1)cm(-1) and 9.44x10(-3) ohm(-1) cm(-1), respectively, was measured in the composite containing 21 vol% of YAG.
PB - Međunarodni Institut za nauku o sinterovanju, Beograd
T2 - Science of Sintering
T1 - Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC
EP - 369
IS - 3
SP - 357
VL - 50
DO - 10.2298/SOS1803357E
ER -
@article{
author = "Egelja, Adela and Pašalić, Snežana and Dodevski, Vladimir and Kragović, Milan M. and Stojković-Simatović, Ivana and Radovanović, Željko and Stojmenović, Marija",
year = "2018",
abstract = "Alumina/YAG composites (AYX_t) with high relative density (99.2 %TD) were successfully obtained by mixing commercial alumina powder with different volume fractions of yttrium aluminium garnet (Y3Al5O12-YAG; 7, 14, 21 and 28). YAG was synthetized by nitrate glycine reaction in the form of precursor powder. Polycrystalline YAG powder was obtained by calcination at 950 degrees C for 2 h. Additionally, obtained compositions were characterized by XRD, SEM, EDX and electrochemical impedance spectroscopy. By XRPD analysis was found that the particle size of YAG powders lies in the nanometric range (being lower than 35 nm). By SEM microphotographs of composites were confirmed the formation of a conductive path consisting from mutually interconnected YAG particles. This was confirmed by the electrochemical impedance spectroscopy. The highest electrical conductivity of grain (K-g) and grain boundary (K-gb) at 700 degrees C amounted to 2.22x10(-2) ohm(-1)cm(-1) and 9.44x10(-3) ohm(-1) cm(-1), respectively, was measured in the composite containing 21 vol% of YAG.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC",
pages = "369-357",
number = "3",
volume = "50",
doi = "10.2298/SOS1803357E"
}
Egelja, A., Pašalić, S., Dodevski, V., Kragović, M. M., Stojković-Simatović, I., Radovanović, Ž.,& Stojmenović, M.. (2018). Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 50(3), 357-369.
https://doi.org/10.2298/SOS1803357E
Egelja A, Pašalić S, Dodevski V, Kragović MM, Stojković-Simatović I, Radovanović Ž, Stojmenović M. Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC. in Science of Sintering. 2018;50(3):357-369.
doi:10.2298/SOS1803357E .
Egelja, Adela, Pašalić, Snežana, Dodevski, Vladimir, Kragović, Milan M., Stojković-Simatović, Ivana, Radovanović, Željko, Stojmenović, Marija, "Structural, Morphological and Electrical Properties of Alumina/YAG Composites as Solid Electrolyte for IT - SOFC" in Science of Sintering, 50, no. 3 (2018):357-369,
https://doi.org/10.2298/SOS1803357E . .
