The structure and properties of vanadium zinc phosphate glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39910914" target="_blank" >RIV/00216275:25310/17:39910914 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.02.012" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2017.02.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.02.012" target="_blank" >10.1016/j.jnoncrysol.2017.02.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The structure and properties of vanadium zinc phosphate glasses

Popis výsledku v původním jazyce

Homogenous bulk glasses of the ternary system xV(2)O(5)-(50-x)ZnO-50P(2)O(5), x = 0-50 were prepared using the conventional melting procedure. The influence of an increasing content of vanadium on their structure and certain physical properties was investigated. Raman spectra revealed a strong depolymerization of the original metaphosphate network for x&gt;10, the non-bridging oxygens are involved in the V-O-P bonds. With an increasing content of V2O5, the intensity of V-0--V vibration increases. ESR results indicate the partial reduction of V+v to V+IV, with the latter being present as VO2+ ions in axially distorted sites with C-4v symmetry. The optical absorption spectroscopy is shown to be more sensitive to changes in the vicinity of isolated paramagnetic vanadium centres than ESR and indicated a decrease in symmetry from C-4v to C-2v. The basic physical characteristics (density, molar volume, glass transition and softening temperatures and thermal expansion coefficient) were measured and discussed in connection with structural changes.

Název v anglickém jazyce

The structure and properties of vanadium zinc phosphate glasses

Popis výsledku anglicky

Homogenous bulk glasses of the ternary system xV(2)O(5)-(50-x)ZnO-50P(2)O(5), x = 0-50 were prepared using the conventional melting procedure. The influence of an increasing content of vanadium on their structure and certain physical properties was investigated. Raman spectra revealed a strong depolymerization of the original metaphosphate network for x&gt;10, the non-bridging oxygens are involved in the V-O-P bonds. With an increasing content of V2O5, the intensity of V-0--V vibration increases. ESR results indicate the partial reduction of V+v to V+IV, with the latter being present as VO2+ ions in axially distorted sites with C-4v symmetry. The optical absorption spectroscopy is shown to be more sensitive to changes in the vicinity of isolated paramagnetic vanadium centres than ESR and indicated a decrease in symmetry from C-4v to C-2v. The basic physical characteristics (density, molar volume, glass transition and softening temperatures and thermal expansion coefficient) were measured and discussed in connection with structural changes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Non-Crystalline Solids

ISSN

0022-3093

e-ISSN

—

Svazek periodika

462

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

65-71

Kód UT WoS článku

000398877700009

EID výsledku v databázi Scopus

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