DOI QR코드

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Spark Plasma Sintering으로 제조한 Li2O-2SiO2 유리 소결체의 전기적 특성

Electrical Property of the Li2O-2SiO2 Glass Sintered by Spark Plasma Sintering

  • 윤혜원 (부산대학교 나노과학기술대학 나노융합공학과) ;
  • 송철호 (부산대학교 나노과학기술대학 나노융합공학과) ;
  • 양용석 (부산대학교 나노과학기술대학 나노융합공학과) ;
  • 윤수종 (부산대학교 나노과학기술대학 나노융합공학과)
  • Yoon, Hae-Won (Department of Nano Fusion Technology, Pusan National University) ;
  • Song, Chul-Ho (Department of Nano Fusion Technology, Pusan National University) ;
  • Yang, Yong-Seok (Department of Nano Fusion Technology, Pusan National University) ;
  • Yoon, Su-Jong (Department of Nano Fusion Technology, Pusan National University)
  • 투고 : 2011.12.26
  • 심사 : 2012.02.01
  • 발행 : 2012.02.27

초록

A $Li_2O-2SiO_2$ ($LS_2$) glass was investigated as a lithium-ion conducting oxide glass, which is applicable to a fast ionic conductor even at low temperature due to its high mechanical strength and chemical stability. The $Li_2O-2SiO_2$ glass is likely to be broken into small pieces when quenched; thus, it is difficult to fabricate a specifically sized sample. The production of properly sized glass samples is necessary for device applications. In this study, we applied spark plasma sintering (SPS) to fabricate $LS_2$ glass samples which have a particular size as well as high transparency. The sintered samples, $15mm\phi{\times}2mmT$ in size, ($LS_2$-s) were produced by SPS between $480^{\circ}C$ and $500^{\circ}C$ at 45MPa for 3~5mim, after which the thermal and dielectric properties of the $LS_2$-s samples were compared with those of quenched glass ($LS_2$-q) samples. Thermal behavior, crystalline structure, and electrical conductivity of both samples were analyzed by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and an impedance/gain-phase analyzer, respectively. The results showed that the $LS_2$-s had an amorphous structure, like the $LS_2$-q sample, and that both samples took on the lithium disilicate structure after the heat treatment at $800^{\circ}C$. We observed similar dielectric peaks in both of the samples between room temperature and $700^{\circ}C$. The DC activation energies of the $LS_2$-q and $LS_2$-s samples were $0.48{\pm}0.05eV$ and $0.66{\pm}0.04eV$, while the AC activation energies were $0.48{\pm}0.05eV$ and $0.68{\pm}0.04eV$, respectively.

키워드

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피인용 문헌

  1. Crystallization Mechanism of Lithium Dislicate Glass with Various Particle Sizes vol.26, pp.1, 2016, https://doi.org/10.3740/MRSK.2016.26.1.54