Effect of substituting iron on structural, thermal and dielectric properties of lithium borate glasses

Journal Article · Thu Oct 15 00:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.05.017· OSTI ID:22475942

Dalal, Seema ^[1]; Dahiya, M. S. ^[1]; Agarwal, A. ^[2]; Yadav, Arti ^[1]; Seth, V. P. ^[3]; Dahiya, S. ^[4]

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1. Physics Department, Deenbandhu Chhotu Ram University of Science & Technology, Murthal 131039 (India)
2. Applied Physics Department, Guru Jambheshwar University of Science and Technology, Hisar 125001 (India)
3. Retd Professor, Physics Department, Maharshi Dayanand University Rohtak 124001 (India)
4. Physics Department, Baba Mast Nath University, Asthal Bohr 124001 (India)

Highlights: • There is increase in NBOs with iron content. • FTIR spectra supported the results predicted by density. • Glass stability has been examined. • Iron shows “blocking effect” on migration of mobile ions. • Internal Circuit varies with temperature and composition. - Abstract: Glasses with composition xFe{sub 2}O{sub 3}·(30 − x)Li{sub 2}O·70B{sub 2}O{sub 3} (x = 0, 2, 5, 7 and 10 mol%) were prepared via melt-quenching technique and their physical, thermal and dielectric properties are discussed. XRD was carried out to confirm the amorphous nature of prepared glasses. Density (ρ) and molar volume (V{sub m}) were found to increase with increase in Fe{sub 2}O{sub 3} content. Infrared absorption spectra depicted that Fe{sub 2}O{sub 3} is acting as a network modifier. DTA has been carried out to determine glass transition temperature (T{sub g}) and crystallization temperature (T{sub x}). Electrical properties have been studied using impedance spectroscopy and dc conductivity. The dc conductivity decreases and activation energy increases on replacing Li{sup +} ions with Fe{sup 3+}. The impedance measurements reveal that the total conductivity obeys Jonscher’s power law. Study of the equivalent circuit analysis up to a temperature of 523 K shows a significant change in the equivalent circuitry with change in temperature and composition.

• OSTI ID: 22475942
• Journal Information: Materials Research Bulletin, Vol. 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
ACTIVATION ENERGY
BORATES
CRYSTALLIZATION
DENSITY
DIELECTRIC PROPERTIES
DIFFERENTIAL THERMAL ANALYSIS
FOURIER TRANSFORMATION
GLASS
INFRARED SPECTRA
IRON ADDITIONS
IRON OXIDES
LITHIUM COMPOUNDS
LITHIUM OXIDES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION