Application of Antiferroelectric Materials in High Voltage Technology
Julian Moxter, M.Sc. High-Voltage Laboratories Department of Electrical Engineering and Information Technology (etit) Technical University of Darmstadt
Within the project “FLAME” the possible application of antiferroelectric materials in power engineering is investigated. Due to their field-dependent permittivity, antiferroelectric materials could be used as possible fillers in nonlinear field grading of high voltage isolation systems. In order to understand this specific application, the focus will initially be on the fundamentals of field control before turning to the use of antiferroelectric materials as fillers. Here, the function and effects of the filler on the physical properties of the composite will be explained, whereby the aspect of electric field strength in the antiferroelectric particles will be considered in more detail. Subsequently, the results of the characterization of sodium niobate as the first lead-free antiferroelectric are shown. For this purpose, the material was mixed into epoxy resin with different filler concentrations and characterized with different experimental setups for their dielectric properties.
About the FLAME-inars
The FLAME-inars are organized by the collaborative project FLAME at TU Darmstadt, in which electronic-structure-property relationships are being developed and exploited to realize novel lead-free antiferroelectric compounds. The seminars will gather experts in processing, characterization and theory to discuss materials and applications, bulk and thin films, fundamental properties, electronic structure & defects, and related aspects.