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The effects of cold isostatic press (CIP) compaction pressures (100–350 MPa) on the piezoelectric properties of K0.5Na0.5NbO3 (KNN) samples prepared as lead-free piezoelectric ceramic was investigated. The calcined powder of KNN samples were pressed at a pressure of 100 MPa using a hand press to produce green body pallets followed by compacting using the CIP. Pelleted samples were placed in a closed...