AN AUTOMATED SETUP FOR MEASURING OF THE ELECTRICAL CONDUCTIVITY OF THE HIGH-RESISTANCE MATERIALS
The article describes an automated system for measuring the current-voltage characteristics of high-resistance materials with the range of the measured resistances to 10 15 Ώ·sm. The setup allows the heating of the sample with a speed of 0.1-10 °C/min (accuracy of temperature measurement is not lower than 0.5 °C), the measuring of the current in the range of 10 -6-10 -12A and the changing of the voltage on the test sample in a range from 10 to 1000 V. The results of the temperature dependence study of the electrical conductivity of lithium niobate crystals are presented.