Crystallization Kinetics of Nanocrystalline Materials by Combined X-ray Diffraction and Differential Scanning Calorimetry Experiments

0489613 - ÚACH 2019 RIV US eng J - Journal Article
Gil-González, E. - Perejón, A. - Sánchez-Jiménez, P. E. - Medina-Carrasco, S. - Kupčík, Jaroslav - Šubrt, Jan - Criado, J. M. - Pérez-Maqueda, L. A.
Crystallization Kinetics of Nanocrystalline Materials by Combined X-ray Diffraction and Differential Scanning Calorimetry Experiments.
Crystal Growth & Design. Roč. 18, č. 5 (2018), s. 3107-3116. ISSN 1528-7483. E-ISSN 1528-7505
Institutional support: RVO:61388980
Keywords : nanocrysalline alloys * combined X ray diffraction * crystallization kinetics
OECD category: Inorganic and nuclear chemistry
Impact factor: 4.153, year: 2018

Crystallization is one key aspect in the resulting properties of nanocrystalline functional materials, and much effort has been devoted to understanding the physical mechanisms involved in these processes as a function of temperature. The main problems associated with crystallization kinetic studies come from the limitations of the employed techniques, and the obtained results may vary significantly depending on the choice of the measurement method. In this work, a complete description of the thermal crystallization event of nanocrystalline BiFeO 3 has been performed by combining the information obtained from three different experimental techniques: in situ high-temperature X-ray diffraction, transmission electron microscopy, and differential scanning calorimetry. Interestingly, the kinetic analysis of the X-ray diffraction and differential scanning calorimetry data yields almost identical results, although the physical properties measured by both techniques are different. This allows the unambiguous determination of the kinetic parameters. The importance of a proper definition of the conversion degree, which is limited by the employed measurement technique, is also highlighted.
Permanent Link: http://hdl.handle.net/11104/0283993