Title :
Current phase shifts in poled polycarbonate caused by temperature oscillations
Author :
Jorge, A. ; Ferreira, G. G Leal
Author_Institution :
Dept. de Fisica, Univ. Federal de Mato Grasso, Cuiaba, Brazil
Abstract :
Temperature oscillations with 1-h period were produced in polycarbonate durolon under an electric field. Large phase shifts (even greater than 90°) were observed around 50°-70°C, the current lagging the temperature signal. The results were interpreted as indicating a negative value for both the susceptibility and the conductivity rate of change with the temperature in the whole range examined and in part of it, respectively
Keywords :
dielectric polarisation; polymers; thermally stimulated currents; 1 hour; 50 to 70 degC; conductivity; current phase shifts; electric field; negative value; phase shifts; poled polycarbonate; polycarbonate durolon; susceptibility; temperature oscillations; Cleaning; Conductivity; Control systems; Current measurement; Electric variables measurement; Electrodes; Optical polarization; Performance evaluation; Phase noise; Temperature distribution;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167280
