Structural study of BaO-MoO3-P2O5 glasses by Raman and NMR spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39910791" target="_blank" >RIV/00216275:25310/17:39910791 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.09.040" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2017.09.040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.09.040" target="_blank" >10.1016/j.jnoncrysol.2017.09.040</a>

Result language

angličtina

Original language name

Structural study of BaO-MoO3-P2O5 glasses by Raman and NMR spectroscopy

Original language description

Glasses in the BaO-MoO3P2O5 ternary system were prepared, their basic physical properties measured and their structure studied by Raman and P-31 NMR spectroscopies. A modified glass-forming region in this system under slow cooling of the melt was determined. Four compositional series, namely (50-x/2)BaO-xMoO(3)-(50-x/2)P2O5 (A), 50BaO-yMoO(3)-(50-y)P2O5 (B), 20BaO-zMoO(3)-(80-z)P2O5 (C) and (70-u)BaO-uMoO(3)-30P(2)O(5) (D) were chosen for a discussion on changes of the structure and properties of the studied glasses. The glass transition temperature revealed a maximum in series A at x = 40 mol% MoO3 and in series C at z = 50 mol% MoO3, whereas monotonous increase of T-g in the series B and monotonous decrease in the series D was observed. P-31 MAS NMR spectra of the glasses revealed depolymerization of the phosphate network, due to the incorporation of molybdate units, and isolated PO4 groups were identified in glasses with high MoO3 content. Fitting the NMR spectra provided compositional dependences of phosphate units Q(n). On the Raman spectra of glasses with low MoO3 content, a strong vibrational band at 940944 cm (-1), with a shoulder at similar to 910 cm (-1), dominated the spectra, which was assigned to the vibration of terminal oxygen atoms in molybdate structural units (M-O- and M=O). In glasses with high MoO3 content, a broad band at similar to 854 cm(-1), ascribed to Mo-O-Mo bonds, showed on the formation of octahedral clusters composed of MoO6 units in the structure of these glasses.

Czech name

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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

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

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

476

Issue of the periodical within the volume

September

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

114-121

UT code for WoS article

000413615800016

EID of the result in the Scopus database

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