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(a) P-E loops of Ag(Nb1−xTax)O3 ceramics for x = 0 and 0.15, (b) Wre and η, and (c) Eb and grain size of Ag(Nb1−xTax)O3 ceramics for x = 0 to 20. The inset of Figure 7c shows SEM images of Ag(Nb1−xTax)O3 ceramics for x = 0 and 0.20. Reproduced with permission [26]. Copyright 2017, Wiley-VCH.
