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← ScienceWhich mechanism causes decreased piezoelectric output when a PZT ceramic package accumulates microcracks under cyclic stress?
A)Decreased domain wall mobility✓
B)Increased internal energy storage
C)Enhanced charge carrier recombination
D)Increased grain boundary capacitance
💡 Explanation
Decreased piezoelectric output arises with decreased domain wall mobility because microcracks in the PZT ceramic lattice impede domain switching under stress. Therefore resulting in lower polarization, rather than other effects like increased energy storage, that result from different failure mechanisms.
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