Open AccessElectrical properties of structures based on varistor ceramics and polymer nanocomposites with carbon filler
Author(s) -
А. С. Тонкошкур,
А. В. Иванченко
Publication year - 2019
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x19500231
Subject(s) - varistor , materials science , composite material , nanocomposite , ceramic , filler (materials) , voltage , electrical engineering , engineering
The characteristics of a two-layer structure on the basis of the layers of varistor ceramics and polymeric PPTC nanocomposite being in thermal contact for the purpose of using it as a limiter of constant voltage and long-term varying electrical overvoltages are analyzed. A theoretical model of such a structure has been developed, and its main electrical characteristics are simulated. It is shown that the provision of the required output voltage limitation is performed by selecting the classification voltage of the varistor layer. The maximum current of the varistor layer required for heating the structure is determined by the intensity of heat transfer to the environment. It has established a satisfactory agreement between the theoretical and experimental electrical characteristics for the structure based on the layers used in commercial varistors and PPTC fuses.