Forming Glasses from Se and Te

Molecules

Bruno Bureau¹  Catherine Boussard-Pledel¹  Pierre Lucas¹  Xianghua Zhang¹ 

[1]¹UMR 6226 Sciences Chimiques de Rennes – Verres & Céramiques, Université de Rennes 1–CNRS, Campus de Beaulieu, 35042 Rennes Cedex, France[2] height:6px

[3]"> ²Department of Material Science and Engineering, University of Arizona, AZ 85721, USA

关键词: selenium;    tellurium;    glass;    infrared;   

DOI  :  10.3390/molecules14114337

来源: mdpi

【 摘 要 】

Despite being close neighbors on the Periodic Table, selenium and tellurium present a totally different abilities to form glasses. Se is a very good glass former, and gives rise to numerous glass compositions which are popular for their transparency in the infrared range and their stability against crystallization. These glasses can be shaped into sophisticated optical devices such as optical fibers, planar guides or lenses. Nevertheless, their transparencies are limited at about 12 μm (depending on the thickness of the optical systems) due to the relatively small mass of the Se element. On the other hand, tellurium is heavier and its use in substitution for Se permits to shift the IR cutoff beyond 20 μm. However, the semimetallic nature of Te limits its glass formation ability and this glass family is known to be unstable and consequently has found application as phase change material in the Digital Versatile Disk (DVD) technology. In this paper, after a review of selenide glasses and their applications, it will be shown how, in a recent past, it has been possible to stabilize tellurium glasses by introducing new elements like Ga or I in their compositions.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.