Electrical conductivity and local structure of lithium iron tungsten vanadate glass

Koken Matsuda, Shiro Kubuki, Kazuhiko Akiyama, Z. Homonnay, E. Kuzmann, Tetsuaki Nishida

Research output: Contribution to journalArticle

Abstract

A relationship between physical properties and local structure of 20Li2O·10Fe2O3·xWO3·(70-x)V2O5 glass, abbreviated as xLFWV glass (x = 0 - 25 in mol%), was investigated by 57Fe-Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), leaching test using 20 vol% HCl and DC two- or four-probe method. 57Fe-Mössbauer spectra of xLFWV glass showed an increase of quadrupole splitting (Δ) from 0.67 to 0.73±0.02mm s-1 and a constant isomer shift (δ) of 0.39±0.01mm s-1 with an increase of 'x' from 0 to 25. This suggests that FeIIIO4 tetrahedra gradually increase their local distortion along with a substitution of WO3 for V2O5. DTA of xLFWV glass showed an increase in glass transition temperature (T g) from 252 to 298°±5C with an increase of 'x'. Composition dependency of T g and Δ indicates that FeIII atoms occupy substitutional sites of WO6 octahedra as network former (NWF), since a large slope of 680 K (mm s-1)-1 was obtained in T g - Δ plot. Comparable electrical conductivities (σ) of 2.5 × 10-6, 1.9 × 10-6, 8.4 × 10-7 and 2.9 × 10-6S cm-1 obtained for xLFWV glasses with 'x' of 0, 10, 20 and 25, respectively increased to 2.4 × 10-2, 2.4 × 10-3, 3.5 × 10-4 and 8.8 × 10-5S cm-1 after annealing at 400 °C for 100 min. Smaller Δ values of 0.58 and 0.67±0.02 mm s-1 obtained in annealed xLFWV glasses with 'x' of 0 and 10, respectively indicate that structural relaxation occurs in VO4 units of vanadate glass units, as had been observed in other vanadate glasses.

Original languageEnglish
Pages (from-to)755-763
Number of pages9
JournalHyperfine Interactions
Volume226
Issue number1-3
DOIs
Publication statusPublished - 2014

Fingerprint

Tungsten
Vanadates
vanadates
Lithium
tungsten
Iron
lithium
iron
Glass
electrical resistivity
glass
Differential thermal analysis
thermal analysis
Structural relaxation
Electric Conductivity
leaching
tetrahedrons
Isomers
glass transition temperature
Leaching

Keywords

  • Electrical conductivity
  • Lithium iron tungsten vanadate glass

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Electrical conductivity and local structure of lithium iron tungsten vanadate glass. / Matsuda, Koken; Kubuki, Shiro; Akiyama, Kazuhiko; Homonnay, Z.; Kuzmann, E.; Nishida, Tetsuaki.

In: Hyperfine Interactions, Vol. 226, No. 1-3, 2014, p. 755-763.

Research output: Contribution to journalArticle

Matsuda, Koken ; Kubuki, Shiro ; Akiyama, Kazuhiko ; Homonnay, Z. ; Kuzmann, E. ; Nishida, Tetsuaki. / Electrical conductivity and local structure of lithium iron tungsten vanadate glass. In: Hyperfine Interactions. 2014 ; Vol. 226, No. 1-3. pp. 755-763.
@article{05fa38de560743b4966e03d87f34f1b0,
title = "Electrical conductivity and local structure of lithium iron tungsten vanadate glass",
abstract = "A relationship between physical properties and local structure of 20Li2O·10Fe2O3·xWO3·(70-x)V2O5 glass, abbreviated as xLFWV glass (x = 0 - 25 in mol{\%}), was investigated by 57Fe-M{\"o}ssbauer spectroscopy, Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), leaching test using 20 vol{\%} HCl and DC two- or four-probe method. 57Fe-M{\"o}ssbauer spectra of xLFWV glass showed an increase of quadrupole splitting (Δ) from 0.67 to 0.73±0.02mm s-1 and a constant isomer shift (δ) of 0.39±0.01mm s-1 with an increase of 'x' from 0 to 25. This suggests that FeIIIO4 tetrahedra gradually increase their local distortion along with a substitution of WO3 for V2O5. DTA of xLFWV glass showed an increase in glass transition temperature (T g) from 252 to 298°±5C with an increase of 'x'. Composition dependency of T g and Δ indicates that FeIII atoms occupy substitutional sites of WO6 octahedra as network former (NWF), since a large slope of 680 K (mm s-1)-1 was obtained in T g - Δ plot. Comparable electrical conductivities (σ) of 2.5 × 10-6, 1.9 × 10-6, 8.4 × 10-7 and 2.9 × 10-6S cm-1 obtained for xLFWV glasses with 'x' of 0, 10, 20 and 25, respectively increased to 2.4 × 10-2, 2.4 × 10-3, 3.5 × 10-4 and 8.8 × 10-5S cm-1 after annealing at 400 °C for 100 min. Smaller Δ values of 0.58 and 0.67±0.02 mm s-1 obtained in annealed xLFWV glasses with 'x' of 0 and 10, respectively indicate that structural relaxation occurs in VO4 units of vanadate glass units, as had been observed in other vanadate glasses.",
keywords = "Electrical conductivity, Lithium iron tungsten vanadate glass",
author = "Koken Matsuda and Shiro Kubuki and Kazuhiko Akiyama and Z. Homonnay and E. Kuzmann and Tetsuaki Nishida",
year = "2014",
doi = "10.1007/s10751-013-0920-8",
language = "English",
volume = "226",
pages = "755--763",
journal = "Hyperfine Interaction",
issn = "0304-3843",
publisher = "Springer Netherlands",
number = "1-3",

}

TY - JOUR

T1 - Electrical conductivity and local structure of lithium iron tungsten vanadate glass

AU - Matsuda, Koken

AU - Kubuki, Shiro

AU - Akiyama, Kazuhiko

AU - Homonnay, Z.

AU - Kuzmann, E.

AU - Nishida, Tetsuaki

PY - 2014

Y1 - 2014

N2 - A relationship between physical properties and local structure of 20Li2O·10Fe2O3·xWO3·(70-x)V2O5 glass, abbreviated as xLFWV glass (x = 0 - 25 in mol%), was investigated by 57Fe-Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), leaching test using 20 vol% HCl and DC two- or four-probe method. 57Fe-Mössbauer spectra of xLFWV glass showed an increase of quadrupole splitting (Δ) from 0.67 to 0.73±0.02mm s-1 and a constant isomer shift (δ) of 0.39±0.01mm s-1 with an increase of 'x' from 0 to 25. This suggests that FeIIIO4 tetrahedra gradually increase their local distortion along with a substitution of WO3 for V2O5. DTA of xLFWV glass showed an increase in glass transition temperature (T g) from 252 to 298°±5C with an increase of 'x'. Composition dependency of T g and Δ indicates that FeIII atoms occupy substitutional sites of WO6 octahedra as network former (NWF), since a large slope of 680 K (mm s-1)-1 was obtained in T g - Δ plot. Comparable electrical conductivities (σ) of 2.5 × 10-6, 1.9 × 10-6, 8.4 × 10-7 and 2.9 × 10-6S cm-1 obtained for xLFWV glasses with 'x' of 0, 10, 20 and 25, respectively increased to 2.4 × 10-2, 2.4 × 10-3, 3.5 × 10-4 and 8.8 × 10-5S cm-1 after annealing at 400 °C for 100 min. Smaller Δ values of 0.58 and 0.67±0.02 mm s-1 obtained in annealed xLFWV glasses with 'x' of 0 and 10, respectively indicate that structural relaxation occurs in VO4 units of vanadate glass units, as had been observed in other vanadate glasses.

AB - A relationship between physical properties and local structure of 20Li2O·10Fe2O3·xWO3·(70-x)V2O5 glass, abbreviated as xLFWV glass (x = 0 - 25 in mol%), was investigated by 57Fe-Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), leaching test using 20 vol% HCl and DC two- or four-probe method. 57Fe-Mössbauer spectra of xLFWV glass showed an increase of quadrupole splitting (Δ) from 0.67 to 0.73±0.02mm s-1 and a constant isomer shift (δ) of 0.39±0.01mm s-1 with an increase of 'x' from 0 to 25. This suggests that FeIIIO4 tetrahedra gradually increase their local distortion along with a substitution of WO3 for V2O5. DTA of xLFWV glass showed an increase in glass transition temperature (T g) from 252 to 298°±5C with an increase of 'x'. Composition dependency of T g and Δ indicates that FeIII atoms occupy substitutional sites of WO6 octahedra as network former (NWF), since a large slope of 680 K (mm s-1)-1 was obtained in T g - Δ plot. Comparable electrical conductivities (σ) of 2.5 × 10-6, 1.9 × 10-6, 8.4 × 10-7 and 2.9 × 10-6S cm-1 obtained for xLFWV glasses with 'x' of 0, 10, 20 and 25, respectively increased to 2.4 × 10-2, 2.4 × 10-3, 3.5 × 10-4 and 8.8 × 10-5S cm-1 after annealing at 400 °C for 100 min. Smaller Δ values of 0.58 and 0.67±0.02 mm s-1 obtained in annealed xLFWV glasses with 'x' of 0 and 10, respectively indicate that structural relaxation occurs in VO4 units of vanadate glass units, as had been observed in other vanadate glasses.

KW - Electrical conductivity

KW - Lithium iron tungsten vanadate glass

UR - http://www.scopus.com/inward/record.url?scp=84901243704&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84901243704&partnerID=8YFLogxK

U2 - 10.1007/s10751-013-0920-8

DO - 10.1007/s10751-013-0920-8

M3 - Article

AN - SCOPUS:84901243704

VL - 226

SP - 755

EP - 763

JO - Hyperfine Interaction

JF - Hyperfine Interaction

SN - 0304-3843

IS - 1-3

ER -