Crystallization behavior of (GeTe4)(x)(GaTe3)(100-x) glasses for far-infrared optics applications

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914318" target="_blank" >RIV/00216275:25310/19:39914318 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0925838818330305?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925838818330305?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.08.150" target="_blank" >10.1016/j.jallcom.2018.08.150</a>

Result language

angličtina

Original language name

Crystallization behavior of (GeTe4)(x)(GaTe3)(100-x) glasses for far-infrared optics applications

Original language description

Differential scanning calorimetry (DSC), X-ray diffraction (XRD), infrared microscopy and Raman spectroscopy were used to study the crystallization behavior of the (GeTe4)(x)(GaTe3)(100-x) glasses for far-infrared optics. Two independent overlapping crystallization processes were found - the initial surface-located precipitation of hexagonal Te and Ga2Te5 phases, followed by formation of the rhombohedral GeTe phase. The initial precipitation process, and in particular the formation of the Ga2Te5 phase, was found to be catalyzed by presence of mechanically induced defects. Finely powdered materials with higher GaTe3 content also exhibited more pronounced separation of the two crystallization sub-processes. Glass stability of the prepared glasses was evaluated in terms of the Hruby criterion - the (GeTe4)(86)(GaTe3)(14) composition was found to be the most stable and most resilient to the negative crystallization-enhancing influence of structure defects. Pros and cons of the compositional evolution of the crystallization behavior (determined via full kinetic description of the involved crystallization subprocesses and kinetic prediction of the crystallization behavior) were discussed with regard to the ceramics and glass-ceramics applications. Glasses with low GaTe3 content appear to be most suitable for preparation of fully ceramic materials, whereas glasses with high GaTe3 content seem to be most suitable for the glass-ceramics applications. (C) 2018 Elsevier B.V. All rights reserved.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

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)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Volume of the periodical

770

Issue of the periodical within the volume

January

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

564-571

UT code for WoS article

000449486300068

EID of the result in the Scopus database

2-s2.0-85051929247