Influence of poling temperature on depolarization current properties of ice electret

摘要

The ice is known as low environment impact material. Ice consists of the water molecules. In ice, protons of water molecule are easy to move at high temperature. But protons in ice are difficult to move at cryogenic temperature. When D.C. voltage is applied to the ice at high temperature, protons are orientated to the cathode side, and the ice is polarized. The ice is cooled down to 77 K with D.C. voltage application. Finally, the polarized ice is kept without D.C. voltage application at 77 K. The polarized ice by this procedure is called ice electret. The poling voltage is the D.C. voltage to polarize. The poling temperature is the temperature of D.C. voltage application. In previous reports, we observed the depolarization current properties of poling temperature 263 K, 253 K and 140 K. Depolarization current of poling temperature 263 K and 253 K was shown two current peaks at around 130 K and 270 K. The depolarization current peak of poling temperature 140 K was observed at only around 130 K. In this report, we showed the influence of poling temperature on depolarization current peak at around 270 K with the parameter of poling temperature between 140 K and 253 K.