Structure-property relationships in barium borophosphate glasses modified with niobium oxide

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901578" target="_blank" >RIV/00216275:25310/16:39901578 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2016.01.017" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2016.01.017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2016.01.017" target="_blank" >10.1016/j.jnoncrysol.2016.01.017</a>

Result language

angličtina

Original language name

Structure-property relationships in barium borophosphate glasses modified with niobium oxide

Original language description

Phosphate glasses containing a high amount of niobium oxide exhibit non-linear optical properties which make them attractive for various optical devices. This contribution is devoted to the investigation of glasses of the series (100 - x)10.5BaO-0.1B(2)O(3)-0.4P(2)O(5)]-xNb(2)O(5) with x = 0-45 and 80[0.5BaO-yB(2)O(3)-(0.5 - y)P2O5]-20Nb(2)O(5) with y = 0-0.25. The basic characteristic parameters of the prepared glasses were determined. The index of refraction of these glasses increases substantially with increasing Nb2O5 content from 1.620 to 2.007 and the glass transition temperature increases within the range of 551-704 degrees C. The glass structure was investigated by P-31, B-11 and Nb-93 NMR, and Raman spectroscopies. Raman spectra revealed that at low Nb2O5 content a strong vibrational band of isolated NbO6 octahedra dominates the spectra. New bands appear in the Raman spectra in the glasses with 30 mol% of Nb2O5 that were assigned to vibrations of Nb-O-Nb bonds interconnecting NbO6 octahedra. B-11 MAS NMR spectra reveal the dominant role of BO4 units in the glass structure. B-11 MAS NMR spectra revealed that with increasing Nb2O5 content new resonances of BO4 units appear in the spectra due to the replacement of B-O-P bonds by B-O-Nb and B-O-B bonds. With an increasing Nb2O5 content, part of the BO4 units is also converted to BO3 units. 93Nb MAS NMR spectra primarily reflect changes in the length of Nb-O bonds in the NbO6 octahedra manifested in a decreasing asymmetry of the octahedra with increasing Nb2O5 content and the formation of niobate clusters. Niobo-borophosphate glasses reveal very high chemical durability as well as high glass transition temperatures due to the replacement of weaker P-O bonds with stronger Nb-O bonds.

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 Non-Crystalline Solids

ISSN

0022-3093

e-ISSN

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Volume of the periodical

437

Issue of the periodical within the volume

April

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

64-71

UT code for WoS article

000372680800011

EID of the result in the Scopus database

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