Abstract
In this communication, an approach to further improve the electrical properties of (K0.5Na0.5)NbO3 (KNN) ceramic (abbreviated as KNN2) was reported. For the conventional ceramic technique (abbreviated as KNN1), the raw materials of K2CO3, Na2CO3 and Nb2O5 were directly used without further processing, while those for KNN2 were ball milled before mixing. The powders prepared by KNN2 exhibited smaller and uniform. The ceramics have higher densities than that of KNN1, which significantly improved the piezoelectric and ferroelectric properties of ceramics. The KNN2 ceramics exhibited very good piezoelectric properties with d33 = 123 pC/N, kp = 33.8 %, Qm = 219.8 and Pr = 20.2 μC/cm3, indicating that KNN2 is a strategy to obtain a dense KNN ceramic with more excellent electrical properties.
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