METHOD OF DETERMINATION OF BEGINNING OF CRYSTALLIZATION AT FLUX GROWTH Russian patent published in 1995 - IPC

FIELD: physico-chemical analysis. SUBSTANCE: mix of oxides is melted, melt is superheated and cooled at a rate of 25 to 50 C/h; at the same time the temperature and electrical resistance are measured, temperature dependence are determined. The melt electrical resistance is measured in succession at frequencies within the range of 100 - 50 · 10³ Hz, resonance frequency in the range of 500 - 25 · 10³Hz is determined, after which the padding resistance of the electrode layer, reactive and the beginning of crystallization is judged by variation of temperature coefficient of resistive component. EFFECT: facilitated procedure. 1 tbl, 2 dwg