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Dielectric relaxation in glass and glass‐ceramic materials of the system La 2 O 3 ‐Gd 2 O 3 ‐PbO‐MnO‐B 2 O 3
Author(s) -
Raykov Radoslav,
Staneva Anna,
Dimitriev Yanko,
Slavov Stanislav,
Soreto Teixeira Silvia,
Prezas Pedro R.,
Costa Luis C.
Publication year - 2019
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.12553
Subject(s) - materials science , arrhenius equation , activation energy , analytical chemistry (journal) , glass transition , relaxation (psychology) , borate glass , dielectric , electrical resistivity and conductivity , dielectric spectroscopy , quenching (fluorescence) , atmospheric temperature range , borosilicate glass , differential thermal analysis , ceramic , spectroscopy , diffraction , thermodynamics , chemistry , optics , composite material , electrochemistry , electrode , fluorescence , doping , polymer , engineering , psychology , social psychology , chromatography , physics , optoelectronics , electrical engineering , quantum mechanics
The electrical properties of new borate‐based glasses in the system La 2 O 3 ‐Gd 2 O 3 ‐PbO‐MnO 2 ‐B 2 O 3 , prepared by the melt‐quenching technique, were investigated. All of these glasses have a fixed content of B 2 O 3 (% mol = 30). The electrical measurements were carried out by impedance spectroscopy in the frequency range from 100 Hz to 1 MH z, and temperatures from 100 to 400°C, below the glass temperature. The AC conductivity increases with temperature according to the Arrhenius law, with a single activation energy. The structural and thermal properties of the glasses were investigated by performing infrared spectroscopy, X‐ray diffraction, and differential thermal analysis. The dependence of the various electrical parameters as a function of the glass composition and temperature was discussed. Evaluations of models and theory of the relaxation mechanisms were predominantly made through comparison with experimental data and a set of phenomenological parameters.