Glass formation and structure of glasses in the ZnO-WO3-La2O3-Al2O3 system

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creativework.keywordsDTA, Melt quenching, Non-traditional glasses
creativework.publisherUniversity of Chemical Technology and Metallurgyjournal@uctm.eduen
dc.contributor.authorAtaalla M.
dc.contributor.authorMilanova M.
dc.contributor.authorAleksandrov L.
dc.contributor.authorIordanova R.
dc.contributor.authorStaneva A.
dc.contributor.authorDimitriev Y.
dc.date.accessioned2024-07-16T11:16:46Z
dc.date.accessioned2024-07-16T11:18:21Z
dc.date.available2024-07-16T11:16:46Z
dc.date.available2024-07-16T11:18:21Z
dc.date.issued2015-01-01
dc.description.abstractThe glass formation region in the section 90(xZnO.yWO3.zLa2O3).10Al2O3 of a constant Al2O3 content of 10 mol % and varying amounts of WO3, ZnO and Nd2O3 from ZnO-WO3-La2O3-Al2O3 system is determined by the melt quenching technique (with cooling rates of 10 Ks-1 - 102 Ks-1). The glasses are obtained from compositions of a high WO3 content (60 mol % - 75 mol %). The amorphous state of the samples is verified by X-ray diffraction (XRD). The thermal parameters of the investigated glasses are obtained by differential thermal analysis (DTA). The glass transition temperature (Tx) is in the range 440°C - 510°C, while the crystallization temperature (Tg) varies from 520°C to 650°C. The glasses are characterized by a good thermal stability in respect to crystallization. ΔT varies in the range of 60°C - 135°C (ΔT = Tx-Tg). The glasses structure is studied by IR spectroscopy. It is established that the amorphous network is built up mainly by WO6 octahedra connected through W-O-W bridges.
dc.identifier.issn1314-7978
dc.identifier.issn1314-7471
dc.identifier.scopusSCOPUS_ID:84937877466en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/1106
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84937877466&origin=inward
dc.titleGlass formation and structure of glasses in the ZnO-WO3-La2O3-Al2O3 system
dc.typeArticle
oaire.citation.issue4
oaire.citation.volume50
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