HOW TO IMPROVE THE DISTRIBUTION COEFFICIENT rare-earth ions in crystals of the cerium subgroup double fluoride

摘要

FIELD: metallurgy.;SUBSTANCE: invention relates to crystal growth process and can be used at creation of activated crystalline materials with predicted properties for needs of photonics, quantum electronics and optics. Optical material on the basis of crystals of double fluorides of scheelite structure is received by means of crystal growth from melt of ingredients LiF, YF₃, LuF₃, LnF₃, where Ln - trivalent ions of cerium subgroup of lanthanide row, herewith into charge for preparation of melt it is introduced lutetia fluoride in amount from 50 mole % up to 90 mole % relative to yttrium fluoride.;EFFECT: invention provides receiving of crystals with increased percentage distribution of trivalent rare-earth ions of cerium subgroup.;1 tbl, 2 dwg