31PNMR and IR study of highly water-stable SrO-BaO-Nb 2O5-P2O5 glass and glass-ceramics

Hirokazu Masai, Ryota Shirai, Kazuki Yoshida, Yoshihiro Takahashi, Rie Ihara, Takumi Fujiwara, Yomei Tokuda, Toshinobu Yoko

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9 Citations (Scopus)


We describe the preparation of [(100-γ)/4](SrO-BaO-2Nb 2O5)-yP2O5 (SBNPγ) glasses and glass-ceramics with the Sr0.5Ba0.5Nb2O 6 (SBN50) phase, using a conventional process, and the analysis of the chemical stability of the materials in water. The SBNPγ glasses and glass-ceramics consist of orthophosphate (Q0) and pyrophosphate (Q1) units with strongly delocalized P=O bonds. Because of the presence of these phosphate units, the glasses and glass-ceramics obtained in this study show no weight changes, even after exposure to water at 70 °C for 100 h. We hypothesize that the lack of phosphate chains within the glass network is responsible for the superior water stability.

Original languageEnglish
Pages (from-to)1305-1307
Number of pages3
JournalChemistry Letters
Issue number10
Publication statusPublished - 2013 Oct 16

ASJC Scopus subject areas

  • Chemistry(all)

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