Thermo-structural characterization of (As2Se3)(100-x)-(As2Te3)(x) glasses for infrared optics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914323" target="_blank" >RIV/00216275:25310/19:39914323 - isvavai.cz</a>
Result on the web
<a href="https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.15919" target="_blank" >https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.15919</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/jace.15919" target="_blank" >10.1111/jace.15919</a>
Alternative languages
Result language
angličtina
Original language name
Thermo-structural characterization of (As2Se3)(100-x)-(As2Te3)(x) glasses for infrared optics
Original language description
Differential scanning calorimetry was used to study thermokinetic behavior of (As2Se3)(100-x)(As2Te3)(x) infrared glasses (seven compositions along the pseudo-binary were investigated). Glass-transition kinetics was described in terms of the Tool-Narayanaswamy-Moynihan model and the relaxation motions were interpreted using Raman spectroscopy data. The enthalpy relaxation kinetics was found to be absolutely uninfluenced by changing Se/Te ratio. On the other hand, DSC crystallization behavior changed significantly with increasing As2Te3 content: Te-rich compositions show marked affinity toward crystallization, whereas in case of the compositions with 0-34 mol.% As2Te3 crystal growth is significantly suppressed. X-ray diffraction analysis indicated presence of monoclinic As2Se3, As2Te3, and As2Se(Te)(3) phases. The complex crystallization behavior occurring in case of the Te-rich compositions was described by superposition of two autocatalytic kinetic signals. Based on the information from infrared microscopy the two overlapping crystallization processes can be attributed to the respective formations of spherulitic and needle-shaped crystallites. Best glass stability was identified in case of the (As2Se3)(66)(As2Te3)(34) composition, which appears to be a potential candidate for optic applications in the far-infrared region of the spectrum.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA17-11753S" target="_blank" >GA17-11753S: Kinetic analysis of complex physico-chemical processes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of the American Ceramic Society
ISSN
0002-7820
e-ISSN
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Volume of the periodical
102
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
382-396
UT code for WoS article
000459932500042
EID of the result in the Scopus database
2-s2.0-85050487603