Kinetics of Decelerated Melting
Wondraczek L, Pan Z, Palenta T, Erlebach A, Misture ST, Sierka M, Micoulaut M, Hoppe U, Deubener J, Greaves GN (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 5
Article Number: 1700850
Journal Issue: 5
Abstract
Melting presents one of the most prominent phenomena in condensed matter science. Its microscopic understanding, however, is still fragmented, ranging from simplistic theory to the observation of melting point depressions. Here, a multimethod experimental approach is combined with computational simulation to study the microscopic mechanism of melting between these two extremes. Crystalline structures are exploited in which melting occurs into a metastable liquid close to its glass transition temperature. The associated sluggish dynamics concur with real-time observation of homogeneous melting. In-depth information on the structural signature is obtained from various independent spectroscopic and scattering methods, revealing a step-wise nature of the transition before reaching the liquid state. A kinetic model is derived in which the first reaction step is promoted by local instability events, and the second is driven by diffusive mobility. Computational simulation provides further confirmation for the sequential reaction steps and for the details of the associated structural dynamics. The successful quantitative modeling of the low-temperature decelerated melting of zeolite crystals, reconciling homogeneous with heterogeneous processes, should serve as a platform for understanding the inherent instability of other zeolitic structures, as well as the prolific and more complex nanoporous metal–organic frameworks.
Authors with CRIS profile
Involved external institutions
Friedrich-Schiller-Universität Jena
Germany (DE)
Alfred University
United States (USA) (US)
University of Paris 4 - Paris-Sorbonne / Université paris IV Paris-Sorbonne
France (FR)
Universität Rostock
Germany (DE)
Technische Universität Clausthal / Clausthal University of Technology
Germany (DE)
University of Cambridge
United Kingdom (GB)
Germany (DE)
Alfred University
United States (USA) (US)
University of Paris 4 - Paris-Sorbonne / Université paris IV Paris-Sorbonne
France (FR)
Universität Rostock
Germany (DE)
Technische Universität Clausthal / Clausthal University of Technology
Germany (DE)
University of Cambridge
United Kingdom (GB)
How to cite
APA:
Wondraczek, L., Pan, Z., Palenta, T., Erlebach, A., Misture, S.T., Sierka, M.,... Greaves, G.N. (2018). Kinetics of Decelerated Melting. Advanced Science, 5(5). https://doi.org/10.1002/advs.201700850
MLA:
Wondraczek, Lothar, et al. "Kinetics of Decelerated Melting." Advanced Science 5.5 (2018).
BibTeX: Download