1. Low thermal expansion ZBLAN‐based glass ceramics containing CaZrF6 crystals.
- Author
-
Huang, Xin, Jiang, Yiguang, Zhang, Longfei, Guan, Feng, Wang, Zaiyang, Yuan, Xinqiang, He, Jin, and Zhang, Long
- Subjects
THERMAL expansion ,GLASS-ceramics ,FLUORIDE glasses ,CERAMICS ,OPTICAL materials ,CRYSTAL glass - Abstract
Fluoride glass is considered as an excellent optical material owing to its ultralow phonon energy (578 cm−1). However, its high thermal expansion coefficient (15.87 × 10−6/K) and deformability severely limit applications under service environments with high temperature, high humidity, and high‐power irradiation. To overcome these limitations, we developed a ZBLAN‐based fluoride glass ceramics (CZBLAN GCs) contained the negative thermal expansion material‐CaZrF6 crystals by phase‐separation engineering. The ability to control the precipitation of the desired crystal phase was achieved by adequate compositional design for phase separation, yielding improved or new properties in the development of fluoride GCs. With the successful precipitation of very uniformly dispersed single CaZrF6 crystals in the glass phase (up to ∼40% crystallinity), a significantly lower thermal expansion coefficient (3.66 × 10−6/K) in the fluoride system was achieved. Moreover, enhanced fluorescence properties of Eu‐doped CZBLAN GCs were observed compared with those of Eu‐doped ZBLAN glass owing to the lower phonon energy in GCs. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF