Effect of MoO3 on structural, thermal and transport properties of lithium phosphate glasses

•Tg changes non-monotonically with the composition.•Addition of MoO3 leads to depolymerization of phosphate chains in the glasses.•The electrical conductivity of the lithium phosphate glasses increases with MoO3 content. A melt quenching method has been adopted to synthesize the glasses 50Li2O–хMoO3...

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Bibliographic Details
Published inJournal of non-crystalline solids Vol. 569; p. 120944
Main Authors Pershina, Svetlana V., Antonov, Boris D., Leonidov, Ivan I.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2021
Subjects
Impedance spectroscopy
Ionic conductivity
Phosphate glasses
Raman Spectroscopy
Structure
Phosphate glasses
Raman Spectroscopy
Impedance spectroscopy
Structure
Ionic conductivity
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Summary:•Tg changes non-monotonically with the composition.•Addition of MoO3 leads to depolymerization of phosphate chains in the glasses.•The electrical conductivity of the lithium phosphate glasses increases with MoO3 content. A melt quenching method has been adopted to synthesize the glasses 50Li2O–хMoO3–(50−х)P2O5 (х = 0, 5, 10, 15, 20, 25 and 27.5 mol%) which show the tendency of devitrification with increasing content of MoO3. The glass transition temperatures are found in the range between 332.3 °C and 361.9 °C when the glass forming domain at the fixed concentration of Li2O is limited to 0 ≤ x ≤ 27.5. Variation of local structure has been studied by Raman spectroscopy. The presence of different phosphate and molybdate structural units is observed. The electrical conductivity of the glasses at room temperature increases with x. The maximum conductivity is 5.0•10−7 S/cm in 50Li2O–27.5MoO3–22.5P2O5 composition at room temperature.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2021.120944