抄録
In the present paper, lead zirconate titanate (PZT) piezoelectric ceramics were subjected to compression under whose electrodes were electrically insulated. Both the static compression and repeated compression fatigue tests were conducted. After applying certain compression loading systematically, resonance and anti-resonance frequencies and an electrostatic capacity were measured by means of an impedance analyzer, and an electromechanical coupling coefficient, a dielectric constant, an elastic coefficient and a piezoelectric constant were evaluated from them. Then variation of the material properties due to mechanical loading was investigated experimentally, and the development of internal damage was evaluated by the variation of the properties.
