Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity
Abstract
Nanocrystalline (Y0.7Gd0.3)(2)O-3 powder, synthetised via polymer complex solution method, was compacted into 25 pellets applying high pressures (173-867 MPa) for 30 s that were subsequently sintered at different temperatures (800-1400 degrees C) for 18 h. The morphology and optical characteristics of the starting powder and prepared ceramic samples were monitored and discussed in order to identify the changes induced with the variations of initial compacting pressure, which influence is often neglected, and with sintering temperature. The grain size tends to decrease significantly with increasing pressure, even when elevated temperatures are used for annealing, while low compacting pressure resulted in grain coarsening and, in some cases, even in anomalous morphology of ceramic samples. Luminescence emission in ceramic samples decays faster than in nanopowders, that is in complete agreement with the grain formation and gradual transformation to the bulk material. Judd-Ofelt intensity ...parameters and branching ratios were calculated taking into account the difference in effective refractive index for nanopowder and ceramic samples. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Keywords:
Grain growth / Electron microscopy / Optical properties / Y2O3Source:
Ceramics International, 2012, 38, 2, 1303-1313Funding / projects:
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-MESTD-Basic Research (BR or ON)-172056)
DOI: 10.1016/j.ceramint.2011.09.004
ISSN: 0272-8842; 1873-3956
WoS: 000300472500057
Scopus: 2-s2.0-83555168283
Collections
Institution/Community
VinčaTY - JOUR AU - Krsmanović, Radenka AU - Antić, Željka AU - Bartova, Barbora AU - Brik, Mikhail G. AU - Dramićanin, Miroslav PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4700 AB - Nanocrystalline (Y0.7Gd0.3)(2)O-3 powder, synthetised via polymer complex solution method, was compacted into 25 pellets applying high pressures (173-867 MPa) for 30 s that were subsequently sintered at different temperatures (800-1400 degrees C) for 18 h. The morphology and optical characteristics of the starting powder and prepared ceramic samples were monitored and discussed in order to identify the changes induced with the variations of initial compacting pressure, which influence is often neglected, and with sintering temperature. The grain size tends to decrease significantly with increasing pressure, even when elevated temperatures are used for annealing, while low compacting pressure resulted in grain coarsening and, in some cases, even in anomalous morphology of ceramic samples. Luminescence emission in ceramic samples decays faster than in nanopowders, that is in complete agreement with the grain formation and gradual transformation to the bulk material. Judd-Ofelt intensity parameters and branching ratios were calculated taking into account the difference in effective refractive index for nanopowder and ceramic samples. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved. T2 - Ceramics International T1 - Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity VL - 38 IS - 2 SP - 1303 EP - 1313 DO - 10.1016/j.ceramint.2011.09.004 ER -
@article{ author = "Krsmanović, Radenka and Antić, Željka and Bartova, Barbora and Brik, Mikhail G. and Dramićanin, Miroslav", year = "2012", abstract = "Nanocrystalline (Y0.7Gd0.3)(2)O-3 powder, synthetised via polymer complex solution method, was compacted into 25 pellets applying high pressures (173-867 MPa) for 30 s that were subsequently sintered at different temperatures (800-1400 degrees C) for 18 h. The morphology and optical characteristics of the starting powder and prepared ceramic samples were monitored and discussed in order to identify the changes induced with the variations of initial compacting pressure, which influence is often neglected, and with sintering temperature. The grain size tends to decrease significantly with increasing pressure, even when elevated temperatures are used for annealing, while low compacting pressure resulted in grain coarsening and, in some cases, even in anomalous morphology of ceramic samples. Luminescence emission in ceramic samples decays faster than in nanopowders, that is in complete agreement with the grain formation and gradual transformation to the bulk material. Judd-Ofelt intensity parameters and branching ratios were calculated taking into account the difference in effective refractive index for nanopowder and ceramic samples. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.", journal = "Ceramics International", title = "Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity", volume = "38", number = "2", pages = "1303-1313", doi = "10.1016/j.ceramint.2011.09.004" }
Krsmanović, R., Antić, Ž., Bartova, B., Brik, M. G.,& Dramićanin, M.. (2012). Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity. in Ceramics International, 38(2), 1303-1313. https://doi.org/10.1016/j.ceramint.2011.09.004
Krsmanović R, Antić Ž, Bartova B, Brik MG, Dramićanin M. Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity. in Ceramics International. 2012;38(2):1303-1313. doi:10.1016/j.ceramint.2011.09.004 .
Krsmanović, Radenka, Antić, Željka, Bartova, Barbora, Brik, Mikhail G., Dramićanin, Miroslav, "Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity" in Ceramics International, 38, no. 2 (2012):1303-1313, https://doi.org/10.1016/j.ceramint.2011.09.004 . .