Abstract
Polarized Raman spectroscopy was applied to characterize domains reorientation in the multilayer piezoelectric ceramic actuators during the poling process and in the near crack tip zone. It is found that the relative intensity of the vibration modes of E(2TO) and E(3TO + 2LO) + B1 (IE(2TO)/Isilent) is affected by electric field and mechanical stress. During the poling process, IE(2TO)/Isilent increases when the applied DC electric field exceeds the coercive electric field. In the near crack tip zone, the IE(2TO)/Isilent mapping indicates that near the crack tip zone indicated that the domains were reoriented and the mapping of Raman shift of E(3TO + 2LO) + B1 mode reveals the stress release caused by crack development. This study also confirms that the relative intensity of IE(2TO)/Isilent can be used for characterization of domains reorientation in PZT‐based ceramics under electric and mechanical stresses.
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