Thermal, structural and crystallization study of Na2O–P2O5–Nb2O5 glasses
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F22%3A39919186" target="_blank" >RIV/00216275:25310/22:39919186 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0022459622006703?pes=vor" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022459622006703?pes=vor</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jssc.2022.123545" target="_blank" >10.1016/j.jssc.2022.123545</a>
Alternative languages
Result language
angličtina
Original language name
Thermal, structural and crystallization study of Na2O–P2O5–Nb2O5 glasses
Original language description
The present investigation deals with the study of the structure, properties and thermal behaviour ofNa2O–P2O5–Nb2O5 glasses prepared in the compositional series 40Na2O-(60-x)P2O5-xNb2O5 (x=0-40 mol%Nb2O5). The modification of starting 40Na2O–60P2O5 glass by Nb2O5 revealed changes both in the structure andproperties. The glass density steeply increases with increasing Nb2O5 content while the molar volume decreases.Parent sodium ultraphosphate glass was covered with a thin layer of partially hydrolysed glass in air. Thechemical durability of Nb2O5 containing glasses was high. The replacement of P2O5 by Nb2O5 resulted in agradual increase in the refraction index as well as in an increase in glass transition temperature and dilatometricsoftening temperature. DSC measurements demonstrated that glasses crystallize under heating in the temperaturerange of 330–880C. The lowest thermal stability was found for the glass containing 40 mol% Nb2O5. The Ramanand NMR spectra indicated that the structure of 40Na2O–60P2O5 glass is formed mainly by Q2 and Q1 phosphateunits interconnected by P–O–P bonds. The replacement of P2O5 by Nb2O5 leads to depolymerization and thepartial transformation of Q2 units into Q1 units and finally to isolated Q0 units. Nb2O5 forms in the glass structureNbO6 octahedra.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.
Data specific for result type
Name of the periodical
Journal of Solid State Chemistry
ISSN
0022-4596
e-ISSN
1095-726X
Volume of the periodical
316
Issue of the periodical within the volume
December
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
123545
UT code for WoS article
000889470300004
EID of the result in the Scopus database
2-s2.0-85138048397