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

, 최용규; , 김경헌; Vladimir A, Chernov; , 허종; , 최용규; , 김경헌; Vladimir A, Chernov; , 허종

J. Korean Ceram. Soc. > Volume 35(11); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(11): 1148.

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

한국전자통신연구원 원천기술연구본부
¹Siberian Synchrotron Radiation Center Budker Institute of Nuclear Physics 630090 Novosibirsk Russia
²포항공과대학교 재료금속공학과 및 환경공학부 비정질무기재료연구실

ABSTRACT

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.

Key words: PbO-Ga$_2$O$_3$, glass, Ga K-edge EXAFS