LASER FLUORIDE NANOCERAMIC AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2013 - IPC C30B28/02 C30B33/02 C30B29/12 C04B35/553 C04B35/622 H01S3/16 B82B3/00 B82Y20/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: fluoride nanoceramic is obtained by thermomechanical treatment of the starting crystalline material made from CaF₂-YbF₃, at plastic deformation temperature to obtain a workpiece in form of a polycrystalline microstructured substance, which is characterised by crystal grain size of 3-100 mcm and a nanostructure inside the grains, by annealing on air at temperature of not less than 0.5 of the melting point with compaction of the obtained workpiece in a vacuum at pressure of 1-3 tf/cm² until the end of the deformation process, followed by annealing in an active medium of carbon tetrafluoride at pressure of 800-1200 mmHg. The starting crystalline material used can be a fine powder which has been subjected to heat treatment in carbon tetrafluoride, or a moulded workpiece of crystalline material made from the powder and heat treated in carbon tetrafluoride.

EFFECT: invention enables to obtain a fluoride nanoceramic with high degree of purity and high uniformity of the structure of said optical material.

4 cl, 3 ex