AC Breakdown Properties of Ice-Starch Sugar Mixed System in Low Temperature

Abstract

This paper reports the AC breakdown characteristics of an ice-starch sugar mixed system under LN₂. We observed the AC breakdown voltage and solidification state of the ice-starch sugar mixed system. These results were shown as follows: (i) the AC breakdown voltage of a 15~20 wt% starch sugar sample under LN₂ is higher than that of 0 wt% (only ice) and 100 wt% (only starch sugar). (ii) the AC breakdown voltage of ice-starch sugar samples does not depend on the cooling speed and freezing time under 243 K (- 30 ℃) or 193 K (- 80 ℃) cooling. (iii) the 0 wt% starch sugar sample (only ice) has many visible voids, but the number of visible voids decreases with the increase of the starch-sugar concentration.