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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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