DETERMINATION OF TEMPERATURE-TIME PARAMETERS OF GROWING SINGLE CRYSTALS β-BaB2O4 BY MODIFIED CZOCHRALSKI METHOD

Abstract

The aim of this work is to find of the mechanism the determination of optimal temperature-time mode of crystallization during the whole process of β-BaB₂O₄ crystal growth by modified Czochralski method. The phase diagram of the BaB₂O₄-Na₂O system in the temperature range of β-BaB₂O₄ crystal growing is taken as a basis. The regularities of the constant geometric size crystals growth depending on the crystal-forming oxides concentration, the drawing and cooling rates and the slope of liquidus were established. The described algorithm of calculation allows to choose an optimum time-temperature crystallization mode during the whole growth process.