scispace - formally typeset
Search or ask a question
Author

I. Thurzo

Bio: I. Thurzo is an academic researcher from Slovak Academy of Sciences. The author has contributed to research in topics: Permittivity & Band gap. The author has an hindex of 3, co-authored 4 publications receiving 27 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, an analysis of the high temperature maximum is formed by a spectrum of relaxations with a single activation energy 1·0 eV, distributed over the dipole frequency factors with the most probable value α0 ∼ 1010 sec−1.
Abstract: Thermally stimulated depolarization (TSD) of phosphate glass of the composition 72·9% P2O5, 8·5% Al2O3, 18·6% CaO, 0·23% MnO has confirmed the existence of two types of “slow” relaxation. Migration polarization leads to TSD maximum near 0 °C, while the high temperature TSD maximum at 113 °C probably corresponds to space charge polarization. An analysis of the high temperature maximum shows that it is formed by a spectrum of relaxations with a single activation energy 1·0 eV, distributed over the dipole frequency factors with the most probable value α0 ∼ 1010 sec−1. Strong dispersion of permittivity points to the space charge polarization, though it is found that the effect is linear and independent of the sample geometry.

11 citations

Journal ArticleDOI
TL;DR: In this paper, the authors measured and analyzed ion thermostimulated currents of several alumina phosphate glasses in terms of distributed polarizations and the relaxation spectrum analysis yields the value of the activation energy for reorientation of complexes 0·73 eV for all subpolarizations distributed in frequency factor with the most probable value ∼1·25×1012 sec−1.
Abstract: Ionic thermostimulated currents (ITC) of several alumina phosphate glasses are measured and analysed in terms of distributed polarizations. The relaxation spectrum analysis yields the value of the activation energy for reorientation of complexes 0·73 eV for all subpolarizations distributed in frequency factor with the most probable value ∼1·25×1012 sec−1. The ITC experimental results are confronted with the dc conductivity measurements within the framework of the used model of alkali ion migration in glass.

7 citations

Journal ArticleDOI
TL;DR: In this article, the maximum of thermally stimulated depolarization near 100 °C and the thermovoltaic effect in aluminophosphate glasses were assumed to be associated with the movement of protons.
Abstract: Several reasons are given to assume both the maximum of thermally stimulated depolarization near 100 °C and the thermovoltaic effect in aluminophosphate glasses to be associated with the movement of protons. The assumption, that the glasses are hydrolyzed, is supported by this finding.

6 citations

Journal ArticleDOI
TL;DR: In this paper, the TSD peak of amorphous As2Se3 is shown not to be simply related to dark conductivity, but also to a group of localized acceptor-like states having energy 0·84 eV in the band gap.
Abstract: The TSD peak of amorphous As2Se3 is shown not to be simply related to dark conductivity. Some reasons are given to search for a relation between the TSD and a group of localized acceptor-like states having energy 0·84 eV in the band gap. It is possible, that these states act as recombination centres of photoluminescence, which method also points to localized states nearly in the middle of the gap.

3 citations


Cited by
More filters
Book ChapterDOI
01 Jan 1980

226 citations

Book ChapterDOI
01 Jan 1979

171 citations

Journal ArticleDOI
TL;DR: In this paper, various areas of application of TSC spectroscopy, used for studying insulating materials, are reviewed and the characteristics of this technique are compared with those of the other thermally stimulated spectroscopies.
Abstract: Various areas of application of thermo-stimulated current (TSC) spectroscopy, used for studying insulating materials, are reviewed. The characteristics of this technique are compared with those of the other thermally stimulated spectroscopies. The origins of TSC are briefly cited. Examples of the identification of TSC peaks with ionic or molecular movements (inorganic or organic materials) are given. >

67 citations

Journal ArticleDOI
TL;DR: In this paper, the feasibility of studying ionic motion in glass using thermally stimulated polarization (TSPC)/depolarization current (TSDC) techniques was investigated with 4Na2O-96SiO2 and 30PbO-70 SiO2 (mol %) glasses.
Abstract: The feasibility of studying ionic motion in glass using thermally stimulated polarization (TSPC)/depolarization current (TSDC) techniques was investigated with 4Na2O-96SiO2 and 30PbO-70SiO2 (mol %) glasses. The TSPC peaks in these glasses were dependent on glass composition and attributed to bulk polarization. The high temperature background TSPC is shown to be due to the d.c. conductivity, whereas the TSPC/TSDC peaks in the 4Na2O glass are attributed to shorter range Na+ motion.

51 citations

Journal ArticleDOI
TL;DR: In this article, the thermally stimulated polarization (TSPC) and depolarization (TSDC) current was used to investigate the sodium ion motion in three sodium silicate glasses and a sodium aluminosilicate glass, and two TSDC peaks were attributed to localized sodiumion movement around a nonbridging oxygen ion, a type of dipolar orientational polarization, and to a longer-range sodium motion leading to interfacial polarization at the immiscible phase boundaries.
Abstract: Sodium-ion motion in three sodium silicate glasses and a sodium aluminosilicate glass was investigated by the thermally stimulated polarization (TSPC) and depolarization (TSDC) current techniques. The two TSDC peaks found in the sodium silicate glasses were attributed to localized sodium-ion movement around a nonbridging oxygen ion, a type of dipolar orientational polarization, and to a longer-range sodium motion leading to interfacial polarization at the immiscible phase boundaries. The high-temperature background (HTB) current corresponded to the sodium motion for dc conductivity and diffusion. The commonly observed dc absorption current was found to be related to the two TSDC peaks.

33 citations