Documents disponibles écrits par cet auteur

Electric relaxational effects induced by displacement current in dielectric materials / Jan Jadzyn in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 807-813 Titre : Electric relaxational effects induced by displacement current in dielectric materials Type de document : texte imprimé Auteurs : Jan Jadzyn, Auteur ; Jolanta Swiergiel, Auteur Année de publication : 2012 Article en page(s) : pp. 807-813 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dielectric  materials Résumé : An investigation was carried out on frequency behavior of the complex electric modulus, the impedance and the conductance, related to the displacement current resulting from the normal Brownian dynamics of relaxing molecular dipoles in dielectric materials. The experiment was performed for the liquid crystalline smectic A phase of n-octylcyanobiphenyl (8CB) in the frequency region of 200 kHz―50 MHz, where the single dielectric relaxation of the Debye-type occurs and, at the same time, the ionic conductivity in the compound is negligibly low (σDC ≈ 0). DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476415 [article] Electric relaxational effects induced by displacement current in dielectric materials [texte imprimé] / Jan Jadzyn, Auteur ; Jolanta Swiergiel, Auteur . - 2012 . - pp. 807-813. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 807-813 Mots-clés : Dielectric  materials Résumé : An investigation was carried out on frequency behavior of the complex electric modulus, the impedance and the conductance, related to the displacement current resulting from the normal Brownian dynamics of relaxing molecular dipoles in dielectric materials. The experiment was performed for the liquid crystalline smectic A phase of n-octylcyanobiphenyl (8CB) in the frequency region of 200 kHz―50 MHz, where the single dielectric relaxation of the Debye-type occurs and, at the same time, the ionic conductivity in the compound is negligibly low (σDC ≈ 0). DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476415

Electric relaxational effects induced by ionic conductivity in dielectric materials / Jolanta Swiergiel in Industrial & engineering chemistry research, Vol. 50 N° 21 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11935-11941 Titre : Electric relaxational effects induced by ionic conductivity in dielectric materials Type de document : texte imprimé Auteurs : Jolanta Swiergiel, Auteur ; Jan Jadzyn, Auteur Année de publication : 2011 Article en page(s) : pp. 11935-11941 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dielectric  materials Résumé : The paper shows how the direct current ionic conductivity (σDC) and the static dielectric permittivity (εs) reveal themselves in the complex impedance, the electric modulus, and the conductance of molecular liquids when the frequency of the electric stimulus is much lower than that corresponding to the dipolar reorientational relaxation of the liquid under investigation. It was shown that, in such static dielectric conditions, one observes the relaxational behavior of the impedance and the electric modulus, both ofthe Debye-type and ofthe same relaxation time, depending on σDC and εs values. The discussion is illustrated with the experimental electric spectra of liquid cyclobutanone recorded in the frequency region from 500 Hz to 5 MHz and in the temperature range from 243 to 313 K. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697511 [article] Electric relaxational effects induced by ionic conductivity in dielectric materials [texte imprimé] / Jolanta Swiergiel, Auteur ; Jan Jadzyn, Auteur . - 2011 . - pp. 11935-11941. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11935-11941 Mots-clés : Dielectric  materials Résumé : The paper shows how the direct current ionic conductivity (σDC) and the static dielectric permittivity (εs) reveal themselves in the complex impedance, the electric modulus, and the conductance of molecular liquids when the frequency of the electric stimulus is much lower than that corresponding to the dipolar reorientational relaxation of the liquid under investigation. It was shown that, in such static dielectric conditions, one observes the relaxational behavior of the impedance and the electric modulus, both ofthe Debye-type and ofthe same relaxation time, depending on σDC and εs values. The discussion is illustrated with the experimental electric spectra of liquid cyclobutanone recorded in the frequency region from 500 Hz to 5 MHz and in the temperature range from 243 to 313 K. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697511