Kinetic study of isothermal crystallization process of Gd2Ti2O7 precursors powder prepared through the Pechini synthetic approach
Апстракт
Crystallization process of Gd2Ti2O7 precursors powder prepared by Pechini-type polymerized complex route has been studied under isothermal experimental conditions in an air atmosphere. It was found that the crystallization proceeds through two-parameter Sestak-Berggren (SB) autocatalytic model, in the operating temperature range of 550 degrees C LT = T LT = 750 degrees C. Based on the behavior of SB parameters (M, N), it was found that in the lower operating temperature range, the crystallites with relatively low compactness exist, which probably disclosed low dimensionality of crystal growth from numerous nucleation sites, where the amorphous solid is produced. In the higher operating temperature region (above 750 degrees C), it was established that a morphological well-defined and high-dimensional particles of the formed pyrochlore phase can be expected. It was found that at T=850 degrees C, there is a change in the rate-determining reaction step, from autocatalytic into the contract...ing volume mechanism. (C) 2015 Elsevier Ltd. All rights reserved.
Кључне речи:
Ceramics / Chemical synthesis / Thermogravimetric analysis (TGA) / X-ray diffraction / DefectsИзвор:
Journal of Physics and Chemistry of Solids, 2015, 85, 160-172Финансирање / пројекти:
- Материјали редуковане димензионалности за ефикасну апсорпцију светлости и конверзију енергије (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Динамика нелинеарних физичкохемијских и биохемијских система са моделирањем и предвиђањем њихових понашања под неравнотежним условима (RS-MESTD-Basic Research (BR or ON)-172015)
DOI: 10.1016/j.jpcs.2015.05.009
ISSN: 0022-3697; 1879-2553
WoS: 000358626700025
Scopus: 2-s2.0-84934969833
Колекције
Институција/група
VinčaTY - JOUR AU - Janković, Bojan Ž. AU - Marinović-Cincović, Milena AU - Dramićanin, Miroslav PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/677 AB - Crystallization process of Gd2Ti2O7 precursors powder prepared by Pechini-type polymerized complex route has been studied under isothermal experimental conditions in an air atmosphere. It was found that the crystallization proceeds through two-parameter Sestak-Berggren (SB) autocatalytic model, in the operating temperature range of 550 degrees C LT = T LT = 750 degrees C. Based on the behavior of SB parameters (M, N), it was found that in the lower operating temperature range, the crystallites with relatively low compactness exist, which probably disclosed low dimensionality of crystal growth from numerous nucleation sites, where the amorphous solid is produced. In the higher operating temperature region (above 750 degrees C), it was established that a morphological well-defined and high-dimensional particles of the formed pyrochlore phase can be expected. It was found that at T=850 degrees C, there is a change in the rate-determining reaction step, from autocatalytic into the contracting volume mechanism. (C) 2015 Elsevier Ltd. All rights reserved. T2 - Journal of Physics and Chemistry of Solids T1 - Kinetic study of isothermal crystallization process of Gd2Ti2O7 precursors powder prepared through the Pechini synthetic approach VL - 85 SP - 160 EP - 172 DO - 10.1016/j.jpcs.2015.05.009 ER -
@article{ author = "Janković, Bojan Ž. and Marinović-Cincović, Milena and Dramićanin, Miroslav", year = "2015", abstract = "Crystallization process of Gd2Ti2O7 precursors powder prepared by Pechini-type polymerized complex route has been studied under isothermal experimental conditions in an air atmosphere. It was found that the crystallization proceeds through two-parameter Sestak-Berggren (SB) autocatalytic model, in the operating temperature range of 550 degrees C LT = T LT = 750 degrees C. Based on the behavior of SB parameters (M, N), it was found that in the lower operating temperature range, the crystallites with relatively low compactness exist, which probably disclosed low dimensionality of crystal growth from numerous nucleation sites, where the amorphous solid is produced. In the higher operating temperature region (above 750 degrees C), it was established that a morphological well-defined and high-dimensional particles of the formed pyrochlore phase can be expected. It was found that at T=850 degrees C, there is a change in the rate-determining reaction step, from autocatalytic into the contracting volume mechanism. (C) 2015 Elsevier Ltd. All rights reserved.", journal = "Journal of Physics and Chemistry of Solids", title = "Kinetic study of isothermal crystallization process of Gd2Ti2O7 precursors powder prepared through the Pechini synthetic approach", volume = "85", pages = "160-172", doi = "10.1016/j.jpcs.2015.05.009" }
Janković, B. Ž., Marinović-Cincović, M.,& Dramićanin, M.. (2015). Kinetic study of isothermal crystallization process of Gd2Ti2O7 precursors powder prepared through the Pechini synthetic approach. in Journal of Physics and Chemistry of Solids, 85, 160-172. https://doi.org/10.1016/j.jpcs.2015.05.009
Janković BŽ, Marinović-Cincović M, Dramićanin M. Kinetic study of isothermal crystallization process of Gd2Ti2O7 precursors powder prepared through the Pechini synthetic approach. in Journal of Physics and Chemistry of Solids. 2015;85:160-172. doi:10.1016/j.jpcs.2015.05.009 .
Janković, Bojan Ž., Marinović-Cincović, Milena, Dramićanin, Miroslav, "Kinetic study of isothermal crystallization process of Gd2Ti2O7 precursors powder prepared through the Pechini synthetic approach" in Journal of Physics and Chemistry of Solids, 85 (2015):160-172, https://doi.org/10.1016/j.jpcs.2015.05.009 . .