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Thermokinetic behavior of Ga-doped GeTe4 glasses

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914310" target="_blank" >RIV/00216275:25310/19:39914310 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.sciencedirect.com/science/article/pii/S0022309319301395?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022309319301395?via%3Dihub</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.jnoncrysol.2019.02.023" target="_blank" >10.1016/j.jnoncrysol.2019.02.023</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Thermokinetic behavior of Ga-doped GeTe4 glasses

  • Original language description

    Differential scanning calorimetry (DSC) and thermomechanical analysis (TMA) were used in conjunction to study thermokinetic behavior of (GeTe4)(y)(GaTe3)(100-y) bulk infrared glasses (for y between 40 and 100). The DSC data were utilized to describe the glass transition and crystallization kinetics in terms of the Tool-Narayanaswamy-Moynihan and Sestak-Berggren models, respectively. The kinetic data are of sufficient quality to enable predictions utilizable for preparation of Ge-Ga-Te ceramics and glass-ceramics. Whereas the compositional evolution of the positions of glass transition and crystallization effects was found to be small, the activation energies obtained for the two processes have shown that in case of the crystallization process the applied heating rate q(+) has large influence on the position of the corresponding kinetic peak on the temperature axis (T-c) and, consequently, on the values of glass stability and glass-forming criteria calculated by using this value. For this reason, a new viscous-flow-related criterion, which utilizes the joint DSC and TMA measurements and is independent from applied q(+), was derived to consider the thermal stability of the glassy materials with regard to their processing (fiber-drawing or shape-molding). Based on the newly developed criteria, the (GeTe4)(67)(GaTe3)(33) glass (positioned near the eutectic) was found to be optimal with respect to the fiber-drawing procedure.

  • 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 Non-Crystalline Solids

  • ISSN

    0022-3093

  • e-ISSN

  • Volume of the periodical

    512

  • Issue of the periodical within the volume

    May

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    8

  • Pages from-to

    7-14

  • UT code for WoS article

    000464486000002

  • EID of the result in the Scopus database

    2-s2.0-85062624391