Authors:
B. Hlaváček Department of Polymers, University of Pardubice Čs. Legií 565, 532 10 Pardubice, Czech Republic

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J. Šesták Institute of Physics, Academy of Sciences Cukrovarnická 10, 162 53 Prague 6, Czech Republic

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L. Koudelka Department of General and Inorganic Chemistry, University of Pardubice Čs. Legií 565, 532 10 Pardubice, Czech Republic

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P. Mošner Department of General and Inorganic Chemistry, University of Pardubice Čs. Legií 565, 532 10 Pardubice, Czech Republic

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J. J. Mareš Institute of Physics, Academy of Sciences Cukrovarnická 10, 162 53 Prague 6, Czech Republic

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Summary 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. Under Tg they completely disappear. The interconnection between the linear oscillators in blocks 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.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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