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

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

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

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

本文言語英語
ページ(範囲)637-640
ページ数4
ジャーナルJournal of the Ceramic Society of Japan
116
1353
DOI
出版ステータス出版済み - 5月 2008

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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