Low temperature-densified NASICON-based ceramics promoted by Na2O-Nb2O5-P2O5 glass additive and spark plasma sintering

He Wang, Keisuke Okubo, Miki Inada, George Hasegawa, Naoya Enomoto, Katsuro Hayashi

研究成果: ジャーナルへの寄稿学術誌査読

24 被引用数 (Scopus)

抄録

The effects of spark plasma sintering (SPS) and Na2O-Nb2O5-P2O5 glass additive have been examined for the sintering of Na3Zr2Si2PO12 (NASICON) ceramics. Full densification of NASICON ceramics is achieved at ~1045 °C, which is 200 °C lower than that of typical conventional sintering. The glass addition is demonstrated to markedly promote densification without any negative effects on electrical conductivity. Among all the glass-added samples, the 5 wt% glass-added sample sintered at 1045 °C for 30 min by SPS exhibits the highest ionic conductivity of 1 × 10−3 S cm−1 at 25 °C with the lowest activation energy of 0.32 eV. These properties are almost the same as those of conventional NASICON ceramics. Formation of a trace amount of NaNbO3 as a secondary phase in the glass-added ceramics is due to an insolubility of Nb in the NASICON phase, and has little influence on the electrical conductivity.

本文言語英語
ページ(範囲)54-60
ページ数7
ジャーナルSolid State Ionics
322
DOI
出版ステータス出版済み - 9月 2018

!!!All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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