Publication detail

Forms of vibrations and structural changes in liquid state

Authors: Hlaváček Bořivoj | Šesták Jaroslav | Koudelka Ladislav | Mošner Petr | Mareš Jiří

Year: 2005

Type of publication: článek v odborném periodiku

Name of source: Journal of Thermal Analysis and Calorimetry

Publisher name: Springer

Page from-to: 271-283

Titles:

Language	Name	Abstract	Keywords
cze	Formy vibrací a strukturní změny v kapalném stavu	Byly zkoumány formy vibrací a posuvu částic v amorfních strukturách.
eng	Forms of vibrations and structural changes in liquid state	The forms of vibrations and displacements of particles in amorphous structures have been investigated. The particles, moving on highly non-linear amplitude, are responsible for the creation of disordered structures of amorphous bodies. The non-linear oscillators, even if ?few? in concentration, are characterized by unpredictable trajectories in phase space. The non-linear oscillators are fully developed in the liquid state above the crossover temperature Tcr and between Tcr and Tg their number decreases and under Tg they completely disappear. The interconnection between the linear oscillators forms blocks and plays the most important role in the characteristic time spectra in liquid state. Using the additive properties of elements polarizibilities, the number of acoustical units in individual blocks at Tcr is estimated to be about 600 units. The diameter of blocks at Tcr was estimated to be about 1.8 nm. Even if the non-linear high amplitude motions disappear at solidification, the remnants of structural irregularity remain and the disordered structure of glass is formed.	Non-linear oscillators, solid-liquid transition, deterministic chaos, crossover temperature, glass transition

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