57Fe Mössbauer and DTA study of R2O · 2FeO · V2O5 · P2O5 glasses (R = Li, Na)

Hiroshi Kurimoto; Tetsuaki Nishida; Shigeto Okada; Jun Ichi Yamaki

doi:10.2109/jcersj2.116.637

⁵⁷Fe Mössbauer and DTA study of R₂O · 2FeO · V₂O₅ · P₂O₅ glasses (R = Li, Na)

Hiroshi Kurimoto, Tetsuaki Nishida, Shigeto Okada, Jun Ichi Yamaki

Department of Advanced Device Materials

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The ⁵⁷Fe Mössbauer spectra of xLi ₂O·2FeO·V₂O₅·P ₂O₅ and xNa₂O2FeO·V₂O ₅·P₂O₅ glasses (x = 0, 0.5, 1.0 and 1.5) consist of two doublets due to Fe^II and Fe^III. The isomer shift indicates that Fe^III atoms form Fe^IIIO₄ tetrahedra or Fe^IIIO₆ octahedra, while Fe^II atoms from Fe^IIO₆ octahedra. A liner relationship exists between the glass transition temperature, T_g, and the quadrupole splitting, Δ, of Fe^III atoms in the Mössbauer spectra. Slopes of the straight lines were estimated to be 460 and 370°C (mm s ^-1)^-1 in xLi₂O·2FeO·V ₂O₅·P₂O₅ and xNa ₂O·2FeO·V₂O₅·P ₂O₅ glasses, respectively. These results suggest that Fe^III atoms form oxygenpolyhedra that are intermediate between Fe^IIIO₄ tetrahedra and Fe^IIIO₆ octahedra. The electric conductivity obtained by a dc four-probe method was of the order of 10^-5 to 10^-6 S cm^-1

Original language	English
Pages (from-to)	637-640
Number of pages	4
Journal	Journal of the Ceramic Society of Japan
Volume	116
Issue number	1353
DOIs	https://doi.org/10.2109/jcersj2.116.637
Publication status	Published - May 2008

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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title = "57Fe M{\"o}ssbauer and DTA study of R2O · 2FeO · V2O5 · P2O5 glasses (R = Li, Na)",

abstract = "The 57Fe M{\"o}ssbauer spectra of xLi 2O·2FeO·V2O5·P 2O5 and xNa2O2FeO·V2O 5·P2O5 glasses (x = 0, 0.5, 1.0 and 1.5) consist of two doublets due to FeII and FeIII. The isomer shift indicates that FeIII atoms form FeIIIO4 tetrahedra or FeIIIO6 octahedra, while FeII atoms from FeIIO6 octahedra. A liner relationship exists between the glass transition temperature, Tg, and the quadrupole splitting, Δ, of FeIII atoms in the M{\"o}ssbauer spectra. Slopes of the straight lines were estimated to be 460 and 370°C (mm s -1)-1 in xLi2O·2FeO·V 2O5·P2O5 and xNa 2O·2FeO·V2O5·P 2O5 glasses, respectively. These results suggest that FeIII atoms form oxygenpolyhedra that are intermediate between FeIIIO4 tetrahedra and FeIIIO6 octahedra. The electric conductivity obtained by a dc four-probe method was of the order of 10-5 to 10-6 S cm-1",

author = "Hiroshi Kurimoto and Tetsuaki Nishida and Shigeto Okada and Yamaki, {Jun Ichi}",

year = "2008",

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doi = "10.2109/jcersj2.116.637",

language = "English",

volume = "116",

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T1 - 57Fe Mössbauer and DTA study of R2O · 2FeO · V2O5 · P2O5 glasses (R = Li, Na)

AU - Kurimoto, Hiroshi

AU - Nishida, Tetsuaki

AU - Okada, Shigeto

AU - Yamaki, Jun Ichi

PY - 2008/5

Y1 - 2008/5

N2 - The 57Fe Mössbauer spectra of xLi 2O·2FeO·V2O5·P 2O5 and xNa2O2FeO·V2O 5·P2O5 glasses (x = 0, 0.5, 1.0 and 1.5) consist of two doublets due to FeII and FeIII. The isomer shift indicates that FeIII atoms form FeIIIO4 tetrahedra or FeIIIO6 octahedra, while FeII atoms from FeIIO6 octahedra. A liner relationship exists between the glass transition temperature, Tg, and the quadrupole splitting, Δ, of FeIII atoms in the Mössbauer spectra. Slopes of the straight lines were estimated to be 460 and 370°C (mm s -1)-1 in xLi2O·2FeO·V 2O5·P2O5 and xNa 2O·2FeO·V2O5·P 2O5 glasses, respectively. These results suggest that FeIII atoms form oxygenpolyhedra that are intermediate between FeIIIO4 tetrahedra and FeIIIO6 octahedra. The electric conductivity obtained by a dc four-probe method was of the order of 10-5 to 10-6 S cm-1

AB - The 57Fe Mössbauer spectra of xLi 2O·2FeO·V2O5·P 2O5 and xNa2O2FeO·V2O 5·P2O5 glasses (x = 0, 0.5, 1.0 and 1.5) consist of two doublets due to FeII and FeIII. The isomer shift indicates that FeIII atoms form FeIIIO4 tetrahedra or FeIIIO6 octahedra, while FeII atoms from FeIIO6 octahedra. A liner relationship exists between the glass transition temperature, Tg, and the quadrupole splitting, Δ, of FeIII atoms in the Mössbauer spectra. Slopes of the straight lines were estimated to be 460 and 370°C (mm s -1)-1 in xLi2O·2FeO·V 2O5·P2O5 and xNa 2O·2FeO·V2O5·P 2O5 glasses, respectively. These results suggest that FeIII atoms form oxygenpolyhedra that are intermediate between FeIIIO4 tetrahedra and FeIIIO6 octahedra. The electric conductivity obtained by a dc four-probe method was of the order of 10-5 to 10-6 S cm-1

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⁵⁷Fe Mössbauer and DTA study of R₂O · 2FeO · V₂O₅ · P₂O₅ glasses (R = Li, Na)

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