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Development of a New Relaxational Process Having Shortened Relaxation Time and Phase Transition in KOH-Doped Ice Single Crystal

1989; Physical Society of Japan; Volume: 58; Issue: 1 Linguagem: Inglês

10.1143/jpsj.58.54

1347-4073

Syuji Kawada, Iwao Takei, Hiroyuki Abé,

Glass properties and applications

Single crystals of KOH-doped ice were grown by a modified Bridgemann method and the dielectric relaxation spectrum was measured in the wide temperature range, from near the melting point to about 65 K in order to elucidate the origin of acceleration of the dielectric relaxation by KOH-doping. It was found that the new relaxational process, in which the dielectric relaxation is greatly accelerated appears near the eutectic point (108 K) and it follows the Arrhenius relation below about 90 K. The phase transition at 72 K reported on the polycrystalline KOH-doped ice was observed on a 2.2 ppm KOH-doped single crystal for the first time.