Synthesis, thermal, structural and electrical properties of vanadium-doped lithium-manganese-borate glass and nanocomposites

Agata Jarocka; Przemysław Michalski; Jacek Ryl; Marek Wasiucionek; Jerzy Garbarczyk; Tomasz Pietrzak

doi:10.1007/s11581-019-03229-5

Synthesis, thermal, structural and electrical properties of vanadium-doped lithium-manganese-borate glass and nanocomposites

Abstract

A glassy sample with a nominal formula LiMn1−3x/2VxBO3 (where x = 0.05) was synthesised using the melt-quenching method. Material was characterised by differential thermal analysis (DTA), X-ray diffactometry (XRD) at room temperature and as a function of temperature (HT-XRD), X-ray photoelectron spectroscopy (XPS), impedance spectroscopy (IS) and scanning electron microscopy (SEM). Dependences of glass transition and crystallisation temperatures on the heating rate in DTA experiments were determined. The initial value of electrical conductivity of the glass was 1.4×10−15 Scm−1. It was significantly increased by a proper thermal nanocrystallisation. The maximum value was higher by 6 orders of magnitude and reached 2.6×10−9 Scm−1 at room temperature. Expected crystalline phases (i.e. monoclinic and hexagonal LiMnBO3) upon heating were identified and assigned to thermal events observed with DTA. Microstructure of nanocrystalline samples observed by SEM revealed nanocrystalline grains noticeably smaller than 100 nm. Results explaining nanocrystallisation process are coherent.

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Authors (6)

Agata Jarocka
Przemysław Michalski
Jacek Ryl dr hab. inż.
Marek Wasiucionek
Jerzy Garbarczyk
Tomasz Pietrzak

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Category:: Articles
Type:: artykuły w czasopismach
Published in:: IONICS no. 26, pages 1275 - 1283,
ISSN: 0947-7047
Language:: English
Publication year:: 2020
Bibliographic description:: Jarocka A., Michalski P., Ryl J., Wasiucionek M., Garbarczyk J., Pietrzak T.: Synthesis, thermal, structural and electrical properties of vanadium-doped lithium-manganese-borate glass and nanocomposites// IONICS -Vol. 26, (2020), s.1275-1283
DOI:: Digital Object Identifier (open in new tab) 10.1007/s11581-019-03229-5
Verified by:: Gdańsk University of Technology