It is evident that all the ceramic samples showed a decreasing trend in their ε r and tan δ values with an increase in frequency but to different extents, owing to the interplay between contributions from the resonant frequencies of dipoles and those from the ferroelectric domains. 49 The ceramic samples had poled permittivity values higher than their unpoled counterparts when possessing a tetragonal crystal structure ( i.e. , PT 1-P and PT 2-P in Fig.
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Influence of the permittivity between fillers and binders on the properties of upside-down composites for recycling purposes.
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