Effect of mixed transition metal ions on DC conductivity in lithium bismuth borate glasses

Journal Article · Wed Jun 24 04:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917877· OSTI ID:22490370

Khasa, S.; Yadav, Arti; Dahiya, M. S.; Seema,; Ashima, ^[1]; Agarwal, A. ^[2]

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1. Physics Department, Deenbandhu Chhotu Ram University of Science & Technology, Murthal-131039 (India)
2. Physics Department, G.J. University of science and technology, Hisar-125001 (India)

The DC conductivities of glasses having composition x(2NiO·V{sub 2}O{sub 5})·(30-x)Li{sub 2}O·20Bi{sub 2}O{sub 3}·50B{sub 2}O{sub 3} (with x=0, 2, 5, 7 and 10, i.e. NVLBB glasses) and glass samples having composition 7NiO·23 Li{sub 2}O·20Bi{sub 2}O{sub 3}·50B{sub 2}O{sub 3} and 7V{sub 2}O{sub 5}·23Li{sub 2}O·20Bi{sub 2}O{sub 3}·50B{sub 2}O{sub 3} (NLBB and VLBB respectively) are investigated as a function of temperature. Conductivity for glasses containing higher percentage of lithium ions is predominantly ionic and in glasses containing higher percentage of transition metal (TM) ions is predominantly electronic. The observed increase in conductivity with x and peak-like behavior at x=7 in NVLBB glasses due to competitive transport of small polaron contributing to a significant structural change in NVLBB glasses. Variation of molar volume and density was also observed with x. In NVLBB glasses, as x increases density increases except a slight decrease at x=7. Also density increases in NLBB whereas in case of VLBB it decreases in comparison to NVLBB1 glass composition. Mott’s small polaron hopping (SPH) model has been applied to analyze the high temperature conductivity data and activation energy.

• OSTI ID: 22490370
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1665; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
BORATES
COMPARATIVE EVALUATIONS
CONCENTRATION RATIO
DIRECT CURRENT
ELECTRIC CONDUCTIVITY
GLASS
LITHIUM IONS
LITHIUM OXIDES
NICKEL OXIDES
TEMPERATURE DEPENDENCE
THULIUM IONS
VANADIUM OXIDES
VARIATIONS