^<57>Fe Mossbauer and DTA study of R_2O・2FeO・V_2O_5・P_2O_5 glasses (R = Li, Na)

Hiroshi Kurimoto; Tetsuaki Nishida; Shigeto Okada; Jun-ichi Yamaki

doi:10.2109/jcersj2.116.637

^<57>Fe Mossbauer and DTA study of R_2O・2FeO・V_2O_5・P_2O_5 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

Abstract

The 57Fe Mössbauer spectra of xLi2O·2FeO·V2O5·P2O5 and xNa2O·2FeO·V2O5·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·V2O5·P2O5 and xNa2O·2FeO·V2O5·P2O5 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.

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 1 2008

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title = "^<57>Fe Mossbauer and DTA study of R_2O・2FeO・V_2O_5・P_2O_5 glasses (R = Li, Na)",

abstract = "The 57Fe M{\"o}ssbauer spectra of xLi2O·2FeO·V2O5·P2O5 and xNa2O·2FeO·V2O5·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·V2O5·P2O5 and xNa2O·2FeO·V2O5·P2O5 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 Jun-ichi Yamaki",

year = "2008",

month = may,

day = "1",

doi = "10.2109/jcersj2.116.637",

language = "English",

volume = "116",

pages = "637--640",

journal = "Journal of the Ceramic Society of Japan",

issn = "1882-0743",

publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",

number = "1353",

}

TY - JOUR

T1 - ^<57>Fe Mossbauer and DTA study of R_2O・2FeO・V_2O_5・P_2O_5 glasses (R = Li, Na)

AU - Kurimoto, Hiroshi

AU - Nishida, Tetsuaki

AU - Okada, Shigeto

AU - Yamaki, Jun-ichi

PY - 2008/5/1

Y1 - 2008/5/1

N2 - The 57Fe Mössbauer spectra of xLi2O·2FeO·V2O5·P2O5 and xNa2O·2FeO·V2O5·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·V2O5·P2O5 and xNa2O·2FeO·V2O5·P2O5 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 xLi2O·2FeO·V2O5·P2O5 and xNa2O·2FeO·V2O5·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·V2O5·P2O5 and xNa2O·2FeO·V2O5·P2O5 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.

U2 - 10.2109/jcersj2.116.637

DO - 10.2109/jcersj2.116.637

M3 - Article

SN - 1882-0743

VL - 116

SP - 637

EP - 640

JO - Journal of the Ceramic Society of Japan

JF - Journal of the Ceramic Society of Japan

IS - 1353

ER -

^<57>Fe Mossbauer and DTA study of R_2O・2FeO・V_2O_5・P_2O_5 glasses (R = Li, Na)

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