Electromechanical properties of paper‐derived potassium sodium niobate piezoelectric ceramics

The small-signal dielectric and piezoelectric coefficients of paper-derived sodium potassium niobate, K0.5Na0.5NbO3 (KNN), were compared with those conventionally prepared samples. Results show similar functional properties KNN without significantly decreasing the coefficient. structure microstructure analysis conventional did not reveal any significant difference in crystal grain size. However, temperature-dependent inter-ferroelectric phase transition temperature estimated from permittivity data revealed a decrease approximately 18°C for is possibly associated structural microstructural defects. This work indicates that optimizing suspension chemistry sintering conditions will be critical to enhance response further. Moreover, ceramic processing, novel cost-effective additive manufacturing technology, can potentially used fabricate other electroceramics wide range porosities sizes as well complex geometries multilayer structures.