Acoustic emission in PZT ceramic in poling process

Results of measurements of acoustic emission in PZT type
ceramic in strong alternating electric field are presented. Measurements were
performed with Sawyer-Tower experimental setup for poling of polarisation of
these ceramic materials. Obtained signals of acoustic emission were submitted to
spectrum analysis. To the interpretation of spectrum the statistical theory of
noise with interactions between events was applied. Time interval parameters
applied to the description of domain walls hops were found for the investigated
ceramic materials.