Local structure of Eu3+ in borosilicate glasses by phonon sideband spectra

Zhidong Yao, Yong Ding, Tokuro Nanba, Yoshinari Miura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

InxNa2O · (40-x)B2O3 · 60SiO2 (mol%) (x = 5, 10, 15, 20, 25, 30) glasses with 0.25mol% Eu2O3 as additive, the local structure around Eu3+ was explored by employing the phonon sideband spectra of Eu3+ associated with the 5D27F0 transition. It was found that the types and fraction of the structural units around Eu3+ varied with glass composition. Moreover, the B-O vibrational mode of BO3 unit exists around Eu3+ when x ≦ 15, which is not present in the same composition glasses free of Eu3+. A greatest asymmetry in the surrounding of Eu3+ occurs at x = 10, inconsistent with a maximum of some physical properties found in sodium borosilicate glasses at a Na:B ratio of about unity. In addition, various structural units possess different coordination preference to Eu3+. The highest theoretical microscopic optical basicity on the oxygen atoms in these units was advocated as a criterion of the coordination preference, which successfully elucidated a series of coordination preference phenomena occurring in silicate, borate and borosilicate glasses.

Original languageEnglish
Pages (from-to)239-243
Number of pages5
JournalMaterials Science Research International
Volume4
Issue number4
Publication statusPublished - Dec 1 1998

Keywords

  • Borosilicate glasses
  • Eu
  • Local structure
  • Microscopic optical basicity
  • Phonon sideband

ASJC Scopus subject areas

  • Materials Science(all)

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