Characterization and structural investigation of lead borophosphate glasses modified by tungsten oxide

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901572" target="_blank" >RIV/00216275:25310/16:39901572 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jallcom.2015.10.229" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2015.10.229</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2015.10.229" target="_blank" >10.1016/j.jallcom.2015.10.229</a>

Result language

angličtina

Original language name

Characterization and structural investigation of lead borophosphate glasses modified by tungsten oxide

Original language description

The effect of WO3 on the properties and structure of PbO-B2O3-P2O5-WO3 quaternary system was studied. Glasses containing up to 60 mol% WO3 were prepared and the variation of several physical properties was determined with respect to chemical composition in a broad compositional range. Chemical durability of WO3-containing glasses is very high and their thermal stability as well. Glass transition temperature increases with increasing WO3 content up to 566oC. Glass structure was studied by Raman spectroscopy and 31P and 11B MAS NMR spectroscopy. NMR spectroscopy reveals the formation of B-O-W linkages and also the existence of tetrahedral BO4 units and trigonal units BO3 in the glass structure. With increasing WO3 content in the glasses, the number of starting tetrahedral B(OP)3O units decreases and B-O-P bridges are replaced gradually by B-O-W and B-O-B bridges, while the number of BO3 units increases. Raman spectra of the studied glasses possess a doublet of strong vibrational bands in the range at 800-1000 cm-1, assigned to vibrations of W-O- a W=O bonds in tungstate structural units. In glasses with a higher WO3 content WO6 octahedra form tungstate clusters interconnected by W-O-W bridges as reflected in the Raman spectra.. The formation of strong P-O-W and B-O-W linkages in the studied glasses explains high chemical durability of the glasses and the observed increase in the glass transition temperature.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JH - Ceramics, fire-proof materials and glass

OECD FORD branch

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Project

<a href="/en/project/GA13-00355S" target="_blank" >GA13-00355S: Multicomponent phosphate and borophosphate glasses</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

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

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Volume of the periodical

658

Issue of the periodical within the volume

February

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

377-384

UT code for WoS article

000366940100049

EID of the result in the Scopus database

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