Publication detail

DIELECTRIC RELAXATION IN GLYCEROL AT LONG-TIME EXPOSURE TO LOW TEMPERATURE

STRÁNÍK, R. HOLCMAN, V.

Original Title

DIELECTRIC RELAXATION IN GLYCEROL AT LONG-TIME EXPOSURE TO LOW TEMPERATURE

English Title

DIELECTRIC RELAXATION IN GLYCEROL AT LONG-TIME EXPOSURE TO LOW TEMPERATURE

Type

conference paper

Language

en

Original Abstract

This paper deals with the dielectric relaxation in glycerol at different temperatures (down to 25 K) for protracted periods of time. Two relaxation maxima were observed. The peak at lower frequencies was ascribed to the relaxation ?-process of glycerol proper; the peak at higher frequencies differed in samples from different manufacturers, so that it represents rather a relaxation peak associated with contaminants and not the true ?-process in glycerol. The ?-process was considerably masked by the conductivity component. During a long-time exposure of glycerol to a low constant temperature, the relaxation spectrum shifts with increasing time to lower frequencies, reaching a steady position after about 20 hours.

English abstract

This paper deals with the dielectric relaxation in glycerol at different temperatures (down to 25 K) for protracted periods of time. Two relaxation maxima were observed. The peak at lower frequencies was ascribed to the relaxation ?-process of glycerol proper; the peak at higher frequencies differed in samples from different manufacturers, so that it represents rather a relaxation peak associated with contaminants and not the true ?-process in glycerol. The ?-process was considerably masked by the conductivity component. During a long-time exposure of glycerol to a low constant temperature, the relaxation spectrum shifts with increasing time to lower frequencies, reaching a steady position after about 20 hours.

Keywords

Dielectric relaxation spectroscopy, dielectric spectrum, dielectrics, physical aging, glycerol

RIV year

2007

Released

12.08.2007

Publisher

University of Miskolc

Location

Miskolc, Hungary

ISBN

978-963-661-783-7

Book

6th international conference of phd students

Edition number

1

Pages from

379

Pages to

384

Pages count

6

BibTex


@inproceedings{BUT22844,
  author="Rostislav {Stráník} and Vladimír {Holcman}",
  title="DIELECTRIC RELAXATION IN GLYCEROL AT LONG-TIME EXPOSURE TO LOW TEMPERATURE",
  annote="This paper deals with the dielectric relaxation in glycerol at different temperatures (down to 25 K) for protracted periods of time. Two relaxation maxima were observed. The peak at lower frequencies was ascribed to the relaxation ?-process of glycerol proper; the peak at higher frequencies differed in samples from different manufacturers, so that it represents rather a relaxation peak associated with contaminants and not the true ?-process in glycerol. The ?-process was considerably masked by the conductivity component. During a long-time exposure of glycerol to a low constant temperature, the relaxation spectrum shifts with increasing time to lower frequencies, reaching a steady position after about 20 hours.",
  address="University of Miskolc",
  booktitle="6th international conference of phd students",
  chapter="22844",
  institution="University of Miskolc",
  year="2007",
  month="august",
  pages="379--384",
  publisher="University of Miskolc",
  type="conference paper"
}