FIELD: machine building.
SUBSTANCE: method for determining concentration and type of relaxation oscillators in crystalline materials consists in the fact that thermally stimulated depolarisation currents (TSDC) are measured; for that purpose, a specimen is temperature-controlled at the temperature not exceeding the fusion temperature; electric field that does not exceed breakdown field is applied to the specimen, and polarisation is performed during the time period that is more than relaxation time at that temperature; after that, without switching off electric field, cooling down to the liquid nitrogen temperature is performed; then, the field is switched off and linear heating of the specimen is performed to the temperature above polarisation temperature; maxima of TSDC specimens, which are heat-treated at the temperatures corresponding to the output of certain type of water molecules, are investigated, which decreases those maxima; then, maxima of TSDC specimens kept in HCl and NH4OH solutions are investigated; as a result, concentration of certain type of defects increases and offset of TSDC maxima takes place; concentration of relaxation oscillators is determined as per the surface area under TSD current curve; type of relaxation oscillators is determined as per activation energy, value and offset of maxima to high and low temperatures.
EFFECT: improving accuracy, reliability and environmental safety at determination of concentration and type of relaxation oscillators in wider range of crystalline materials as a result of investigation and comparison of spectra of thermally stimulated depolarisation currents of initial pure, heat-treated specimens and those treated with acid and alkali.
11 dwg, 3 tbl
