한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제35권11호
  • /
  • Pages.1148-1154
  • /
  • 1998
  • /
  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
권호 표지

갈륨 K 흡수단의 저온 EXAFS를 이용한 PbO-Ga$_2$O$_3$ 유리의 구조 해석

Structure Study of PbO-Ga$_2$O$_3$ Glasses Using Ga K-edge EXAFS Taken at Cryogenic Temperature

  • 최용규 (한국전자통신연구원 원천기술연구본부) ;
  • 김경헌 (한국전자통신연구원 원천기술연구본부) ;
  • ;
  • 허종 (포항공과대학교 재료금속공학과 및 환경공학부 비정질무기재료연구실)
  • Choi, Yong-Gyu (Telecommunication Basic Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Kim, Kyong-Hon (Telecommunication Basic Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Chernov, Vladimir A (Siberian Synchrotron Radiation Center Budker Institute of Nuclear Physics) ;
  • Heo, Jong (Non-Crystalline Materials Laboratory, Department of Materials Science and Engineering/School of Environmental Engineering, Pohang University of Science and Technology)
  • 발행 : 1998.11.01
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초록

Ga K-edge EXAFS spectra of PbO-Ga2O3 glasses were recorded at liquid nitrogen temperature and analyz-ed in order to quantitatively understand the medium-range-order arrangement around gallium in the glasses. The second peak was generated from a backscattering of the neighbor balliums and the Ga-Ga distance is ~3.13 A with Ga coordination number of ~2.7 Therefore GaO4 tetrahedra are connected through the cor-ner~sharing mode and form their own clusters made of the tetrahedra sharing more than 3 corners while some chains or rings are also present. These connection schemes of the GaO4 tetrahedra are believed to form the substantial part of the network structure.

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