The influence of B2O3 on structure and ionic conductivity of lithium phosphate-niobate glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F24%3A39921728" target="_blank" >RIV/00216275:25310/24:39921728 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0022309324004356?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022309324004356?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2024.123258" target="_blank" >10.1016/j.jnoncrysol.2024.123258</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The influence of B2O3 on structure and ionic conductivity of lithium phosphate-niobate glasses

Popis výsledku v původním jazyce

Glasses in the series (100-x)[0.4Li2O-0.2Nb2O5-0.4P2O5]-xB2O3 were prepared with B2O3 content ranging from 0 to 48 mol%. The glass transition temperature (Tg) increases with up to 8 mol% B2O3, peaking at 512 degrees C, then decreases to 490 degrees C at 40 mol% B2O3. Raman spectra at low B2O3 content indicate the presence of NbO6 octahedra. XRD patterns of crystallized samples reveal NbOPO4 formation across the entire composition range. Confrontation of the Raman spectra of glasses and crystalized glasses resulted in the assignment of the broad Raman band at 777-804 cm- 1 to Nb-O-Nb vibrations in the NbO6 octahedra. 11 B MAS NMR shows a transition from BO4 to BO3 units, while 31 P MAS NMR suggests mixed borate-phosphate structures. Using 2D NMR techniques, mixed species were identified in the glass network. Ionic conductivity remained stable up to 16 mol% B2O3 but decreased significantly at higher concentrations due to reduced Li+ ion mobility in the mixed phosphate-borate network.

Název v anglickém jazyce

The influence of B2O3 on structure and ionic conductivity of lithium phosphate-niobate glasses

Popis výsledku anglicky

Glasses in the series (100-x)[0.4Li2O-0.2Nb2O5-0.4P2O5]-xB2O3 were prepared with B2O3 content ranging from 0 to 48 mol%. The glass transition temperature (Tg) increases with up to 8 mol% B2O3, peaking at 512 degrees C, then decreases to 490 degrees C at 40 mol% B2O3. Raman spectra at low B2O3 content indicate the presence of NbO6 octahedra. XRD patterns of crystallized samples reveal NbOPO4 formation across the entire composition range. Confrontation of the Raman spectra of glasses and crystalized glasses resulted in the assignment of the broad Raman band at 777-804 cm- 1 to Nb-O-Nb vibrations in the NbO6 octahedra. 11 B MAS NMR shows a transition from BO4 to BO3 units, while 31 P MAS NMR suggests mixed borate-phosphate structures. Using 2D NMR techniques, mixed species were identified in the glass network. Ionic conductivity remained stable up to 16 mol% B2O3 but decreased significantly at higher concentrations due to reduced Li+ ion mobility in the mixed phosphate-borate network.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

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

1873-4812

Svazek periodika

646

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

123258

Kód UT WoS článku

001344487000001

EID výsledku v databázi Scopus

2-s2.0-85207009750