Premium
Optical and Mechanical Properties of Glasses and Glass–Ceramics Based on the Ge–Ga–Se System
Author(s) -
Rozé Mathieu,
Calvez Laurent,
Ledemi Yannick,
Allix Mathieu,
Matzen Guy,
Zhang XiangHua
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02684.x
Subject(s) - materials science , ceramic , thermal expansion , composite material , crystallization , glass transition , diffraction , fracture toughness , microstructure , glass ceramic , mineralogy , optics , polymer , chemical engineering , chemistry , physics , engineering
In this paper, the mechanical and thermo‐mechanical properties of glasses and glass–ceramics belonging to the Ge–Ga–Se system are studied. Pure glasses slightly transparent in the visible range up to 16 μm have been synthesized. Glass–ceramics were made using an appropriate heat‐treatment time and temperature from the 80GeSe 2 –20Ga 2 Se 3 base glass in order to improve the mechanical properties. The optical and mechanical properties of glasses and glass–ceramics such as hardness and toughness were investigated. X‐ray diffraction (XRD) versus temperature experiments were performed to understand the crystallization evolution as a function of heat‐treatment time. GeGa 4 Se 8 and GeSe 2 crystalline phases have been determined with XRD. As a result, glass–ceramics with 40% density of crystals present a very low thermal expansion coefficient (11.8 × 10 −6 ± 0.5 K −1 ) and an excellent infrared transmission in the 3–5 and 8–13 μm regions.