Experimental Nonevidence of Fragile-to-Strong Crossover
This study explores the viscosity behavior of the Ge-Se chalcogenide glass-forming system. Four compositions containing 5, 10, 15, and 20 at. % germanium were examined. Viscosity measurements were performed over a broad range, spanning approximately 13 orders of magnitude, by combining the pressure-assisted melt filling technique with penetration and parallel-plate viscometry. The results demonstrate that no fragile-to-strong crossover occurs in any of the studied compositions.
Authors
- Jiřı́ Málek
- Stanislav Šlang (ORCID: https://orcid.org/0000-0001-7760-2964)
- Markus A. Schmidt (ORCID: https://orcid.org/0000-0002-5324-6405)
- Michaela Včeláková (ORCID: https://orcid.org/0009-0004-1206-3436)
- Jaroslav Barták (ORCID: https://orcid.org/0000-0001-8675-1144)
- Petr Košťál (ORCID: https://orcid.org/0000-0003-1834-9721)
- Torsten Wieduwilt (ORCID: https://orcid.org/0000-0002-8809-3074)
Institutions
- University of Pardubice (CZ)
- Schott (Germany) (DE)
- Leibniz Institute of Photonic Technology (DE)
- Friedrich Schiller University Jena (DE)
Publication Details
- Journal
- ACS Materials Letters
- Published
- 2025-12-02
- DOI
- https://doi.org/10.1021/acsmaterialslett.5c01178
- Primary Topic
- Phase-change materials and chalcogenides
- Type
- article
- Field-Weighted Citation Impact
- 0.00