A new process for high performance optical ceramics

An innovative process for the production of highly transparent and rugged polycrystalline sulphide-based ceramics
A new process for high performance optical ceramics

The optical transparency of materials in the infrared region attracts a great deal of attention for many applications of passive optics (missiles guidance, night vision devices) or active optics (laser sources, sensors). Considering the target applications, e.g. in harsh environmental conditions, these materials must also possess high thermomechanical performances. Researchers at ISCR, Glasses & Ceramics team, have produced sulphide-based ceramics with unprecedented optical and mechanical properties through an innovative high-purity powder technology process. Protected by an international patent, the original method provides at a lower cost transparent ceramics with transmission of the theoretical level and twice as hard as commercial products. This cost-effective process forms the basis of a field of investigation for other sulphide compositions and real perspectives on the development of innovative optical materials, highly anticipated, particularly by the military market.

References

  • Patent WO2016/005439 "Method of manufacturing a sulfide-based ceramic element particularly for IR-optics applications", N. Hakmeh, O. Merdrignac-Conanec, X.-H. Zhang, en co-propriété CNRS/Université de Rennes 1
     
  • New insights in structural characterization of transparent ZnS ceramics hot-pressed from nanocrystalline powders synthesized by combustion. G. Durand, N. Hakmeh, V. Dorcet, V. Demange, F. Cheviré, O. Merdrignac-Conanec, J. Eur. Ceram. Soc. 39 (2019) 3094-3102

Contacts

  • O. Merdrignac-Conanec - odile [dot] merdrignacatuniv-rennes1 [dot] fr
    Univ Rennes, CNRS, ISCR-6226, F-35000 Rennes, France
     
  • X.-H. Zhang - xiang-hua [dot] zhangatuniv-rennes1 [dot] fr
    Univ Rennes, CNRS, ISCR-6226, F-35000 Rennes, France