Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates
Samo za registrovane korisnike
2017
Autori
Milićević, Bojana R.Kuzman, Sanja
Porobić, Slavica
Marinović-Cincović, Milena
Dramićanin, Miroslav
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
The systematic investigation of crystallization kinetics of heavy-group lanthanide dititanate pyrochlores, HL2Ti2O7 (HL=Lu, Tm, Er, Ho, Y, Dy, and Tb) is presented. Materials are prepared by the Pechini-type polymerized complex route, and their thermal properties were studied by differential thermal analysis under non-isothermal conditions. For this group, the crystallization temperature became larger with increasing the ionic radius of lanthanides, from 1066 K for Lu2Ti2O7 to 1125 K for Tb2Ti2O7. The linear dependence of crystallization temperature on radius of heavy lanthanide ions is found to follows T-c [K] = 168.86 + 920.89 x r(ion) [angstrom] semi-empirical equation. Apparent activation energies of crystallization were obtained from calculations based on the Arrhenius equation, isoconversional method and PerezMaqueda method, and are similar to 805 kJ mol(-1) calculated by three different methods. The crystallization kinetics followed the so-called Avrami Erofeev (A3) model, as co...nfirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda methods. The crystallization mechanism of all lanthanide dititanate pyrochlores is found to be the same, and the crystallization process involves a constant rate of nucleation and two-dimensional growth of nuclei. (C) 2017 Elsevier B.V. All rights reserved.
Ključne reči:
Lanthanide pyrochlores / Lanthanide dititanate / Thermal properties / Activation energy / CrystallizationIzvor:
Optical Materials, 2017, 74, 86-92Finansiranje / projekti:
- Materijali redukovane dimenzionalnosti za efikasnu apsorpciju svetlosti i konverziju energije (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Uticaj veličine, oblika i strukture nanočestica na njihova svojstva i svojstva nanokompozita (RS-MESTD-Basic Research (BR or ON)-172056)
Napomena:
- 6th International Conference of Excited States of Transition Elements (ESTE) / Workshop on Luminescence, Aug 21-26, 2016, Polanica Zdroj, Poland
DOI: 10.1016/j.optmat.2017.03.058
ISSN: 0925-3467; 1873-1252
WoS: 000418989400013
Scopus: 2-s2.0-85017142020
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Milićević, Bojana R. AU - Kuzman, Sanja AU - Porobić, Slavica AU - Marinović-Cincović, Milena AU - Dramićanin, Miroslav PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7198 AB - The systematic investigation of crystallization kinetics of heavy-group lanthanide dititanate pyrochlores, HL2Ti2O7 (HL=Lu, Tm, Er, Ho, Y, Dy, and Tb) is presented. Materials are prepared by the Pechini-type polymerized complex route, and their thermal properties were studied by differential thermal analysis under non-isothermal conditions. For this group, the crystallization temperature became larger with increasing the ionic radius of lanthanides, from 1066 K for Lu2Ti2O7 to 1125 K for Tb2Ti2O7. The linear dependence of crystallization temperature on radius of heavy lanthanide ions is found to follows T-c [K] = 168.86 + 920.89 x r(ion) [angstrom] semi-empirical equation. Apparent activation energies of crystallization were obtained from calculations based on the Arrhenius equation, isoconversional method and PerezMaqueda method, and are similar to 805 kJ mol(-1) calculated by three different methods. The crystallization kinetics followed the so-called Avrami Erofeev (A3) model, as confirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda methods. The crystallization mechanism of all lanthanide dititanate pyrochlores is found to be the same, and the crystallization process involves a constant rate of nucleation and two-dimensional growth of nuclei. (C) 2017 Elsevier B.V. All rights reserved. T2 - Optical Materials T1 - Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates VL - 74 SP - 86 EP - 92 DO - 10.1016/j.optmat.2017.03.058 ER -
@article{ author = "Milićević, Bojana R. and Kuzman, Sanja and Porobić, Slavica and Marinović-Cincović, Milena and Dramićanin, Miroslav", year = "2017", abstract = "The systematic investigation of crystallization kinetics of heavy-group lanthanide dititanate pyrochlores, HL2Ti2O7 (HL=Lu, Tm, Er, Ho, Y, Dy, and Tb) is presented. Materials are prepared by the Pechini-type polymerized complex route, and their thermal properties were studied by differential thermal analysis under non-isothermal conditions. For this group, the crystallization temperature became larger with increasing the ionic radius of lanthanides, from 1066 K for Lu2Ti2O7 to 1125 K for Tb2Ti2O7. The linear dependence of crystallization temperature on radius of heavy lanthanide ions is found to follows T-c [K] = 168.86 + 920.89 x r(ion) [angstrom] semi-empirical equation. Apparent activation energies of crystallization were obtained from calculations based on the Arrhenius equation, isoconversional method and PerezMaqueda method, and are similar to 805 kJ mol(-1) calculated by three different methods. The crystallization kinetics followed the so-called Avrami Erofeev (A3) model, as confirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda methods. The crystallization mechanism of all lanthanide dititanate pyrochlores is found to be the same, and the crystallization process involves a constant rate of nucleation and two-dimensional growth of nuclei. (C) 2017 Elsevier B.V. All rights reserved.", journal = "Optical Materials", title = "Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates", volume = "74", pages = "86-92", doi = "10.1016/j.optmat.2017.03.058" }
Milićević, B. R., Kuzman, S., Porobić, S., Marinović-Cincović, M.,& Dramićanin, M.. (2017). Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates. in Optical Materials, 74, 86-92. https://doi.org/10.1016/j.optmat.2017.03.058
Milićević BR, Kuzman S, Porobić S, Marinović-Cincović M, Dramićanin M. Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates. in Optical Materials. 2017;74:86-92. doi:10.1016/j.optmat.2017.03.058 .
Milićević, Bojana R., Kuzman, Sanja, Porobić, Slavica, Marinović-Cincović, Milena, Dramićanin, Miroslav, "Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates" in Optical Materials, 74 (2017):86-92, https://doi.org/10.1016/j.optmat.2017.03.058 . .