METHOD OF PRODUCING FLUORIDE NANOCERAMIC Russian patent published in 2011 - IPC C30B28/02 C30B33/02 C30B29/12 C04B35/553 C04B35/622 H01S3/16 B82B3/00 

FIELD: physics.

SUBSTANCE: method involves thermomechanical processing of initial crystalline material made from metal halides at plastic deformation temperature, obtaining a polycrystalline microstructured substance characterised by crystal grain size of 3-100 mcm and intra-grain nanostructure, where thermomechanical processing of the initial crystalline material is carried out in vacuum of 10^-4 mm Hg, thus achieving degree of deformation of the initial crystalline material by a value ranging from 150 to 1000%, which results in obtaining polycrystalline nanostructured material which is packed at pressure 1-3 tf/cm² until achieving theoretical density, followed by annealing in an active medium of a fluorinating gas. The problem of obtaining material of high optical quality for a wide range of compounds: fluoride ceramic based on fluorides of alkali, alkali-earth and rare-earth elements, characterised by a nanostructure, is solved owing to optimum selection of process parameters for producing a nanoceramic, which involves thermal treatment of the product under conditions which enable to increase purity of the medium and, as a result, achieve high optical parameters for laser material.

EFFECT: nanosize structure of the ceramic and improved optical, laser and generation characteristics.

3 cl, 3 ex