Influence of rare earth additives and boron component on electrical conductivity of sodium rare earth borate glasses

Susumu Nakayama, Takamitsu Watanabe, Taro Asahi, Hajime Kiyono, Yan Lin Aung, Masatomi Sakamoto

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Sodium rare earth borate glasses (Na2O)35.7(RE 2O3)7.2(B2O3) 57.1 (RE = Sm, Gd, Dy, Ho, Y, Er, and Yb), were prepared from a mixture of Na2CO3, RE2O3 and B 2O3, and their properties as an Na+ ionic conductor were investigated. Density increased with increasing atomic weight of RE. Crystallization temperature and crystal melting temperature of the present borate system was lower than that of the previously reported silicate and germanate system. Results of the 11B NMR measurement suggested that half of all boron atoms are coordinated by four oxide ions to give a [BO 4] tetrahedral unit and the others are coordinated by three oxide ions to give a [BO3] planar triangular unit. The electrical conductivity slightly decreased with increasing the ionic radius of RE 3+. (Na2O)35.7(Y2O3) 7.2(B2O3)57.1 glass exhibited the electrical conductivity which is about one order of magnitude lower than those of the previously reported (Na2O)35.7(Y2O 3)7.2(SiO2)57.1 and (Na 2O)35.7(Y2O3)7.2(GeO 2)57.1 glasses. It was assumed that this lower electrical conductivity is due to the lower content of Na+ ions as conduction species in the former glass, compared with the latter two glasses.

本文言語English
ページ(範囲)2323-2327
ページ数5
ジャーナルCeramics International
36
8
DOI
出版ステータスPublished - 2010 12
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • プロセス化学およびプロセス工学
  • 表面、皮膜および薄膜
  • 材料化学

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