Analysis of investigations of the lithium niobate charge LiNbO3:Mg synthesized on the basis of Nb2O5:Mg precursors of different genesis

An analysis was made of studies on the preparation of a charge of lithium niobate used for growing crystals LiNbO3:Mg by the Czochralski method. The charge was synthesized on the basis of precursors Nb2O5:Mg of different genesis. The results of studies of the mixture by X-ray phase analysis, atomic emission spectrographic analysis, gas chromatography-mass spectrometry, mass spectrometry with inductively coupled plasma and laser ablation are presented. It has been established that in the studied systems, a uniform distribution of magnesium impurities in the charge is observed, which leads to the production of crystals of high optical quality with impurity distribution coefficients above unity. It has been shown that the presence of organic inclusions makes it possible to introduce more magnesium into the growing crystal. The results are of great importance in the technology of growing single crystals of lithium niobate when choosing a method for the synthesis of a charge in order to use the crystals obtained from it in specific areas of technology.