title: Second-order optical nonlinearity and ionic conductivity of nanocrystalline GeS2-Ga2S3-LiI glass-ceramics with improved thermo-mechanical properties.
abstract: IR-transparent chalcogenide glass-ceramics were fabricated through a careful ceramization process of the as-prepared 65 GeS(2) x 25 Ga(2)S(3) x 10 LiI glasses at a temperature of 403 degrees C for various durations. Owing to the precipitation of Li(x)Ga(y)S(z) crystals with a Ga(2)S(3)-like structure, clear second-harmonic generation was observed in the sample crystallized at 403 degrees C for 60 h, which has a greatly improved resistance to environmental impairment. Additionally, it is found that the shorter crystallization process (< or = 60 h) contributed to the enhancement of Li(+) ionic conductivity, whereas a longer heat-treatment (80 h) would impair that of the glass-ceramics. The micro-structural origin of these varied properties was elucidated in detail. The corresponding results will be of benefit for the optimization of designed transparent chalcogenide glass-ceramics with improved thermo-mechanical properties, a permanent second-order optical nonlinearity, or a well-enhanced ionic conductivity for application in amorphous solid electrolytes.
authors.affiliation: Key Laboratory of Silicate Materials Science and Engineering (Wuhan University of Technology), Ministry of Education, Wuhan, Hubei 430070, PR China. linchanggui@gmail.com
authors.forename: Changgui
authors.initials: C
authors.lastname: Lin
authors.forename: Laurent
authors.initials: L
authors.lastname: Calvez
authors.forename: Bruno
authors.initials: B
authors.lastname: Bureau
authors.forename: Haizheng
authors.initials: H
authors.lastname: Tao
authors.forename: Mathieu
authors.initials: M
authors.lastname: Allix
authors.forename: Zhangxiang
authors.initials: Z
authors.lastname: Hao
authors.forename: Vincent
authors.initials: V
authors.lastname: Seznec
authors.forename: Xianghua
authors.initials: X
authors.lastname: Zhang
authors.forename: Xiujian
authors.initials: X
authors.lastname: Zhao