Abstract
We formed c-axis-oriented (Sr,Ca)2NaNb5O15 (SCNN) sheets using the green sheet process and the high-magnetic-field method, and we succeeded in realizing c-axis-oriented single plates (O-SP) and c-axis-oriented multilayer piezoelectric ceramics (O-MLPC) for SCNN. From the measurement results of displacement induced by electric field, it was clarified that effective d33 of the O-SP was 240 pm/V. This value was about 3 times larger than that of the randomly oriented single plate, which was 70% of that of single crystal. Moreover, it was confirmed that O-MLPC indicated displacements 3 times as large as that of the conventional multilayer piezoelectric ceramics. In this study, we clarified that piezoelectric properties in bulk and multilayer structure can be drastically enhanced using the green sheet process and the high-magnetic-field method.
