Electric field dependence of the strain characteristics on the (Pb, Ba, Sr) (Zr, Ti, Sn, Nb)O
3 compositions were investigated. It was found that the measured strain (δ) increases with increasing applied DC electric field. The δ was larger than the strain of calculated value (δ
cal) from multiplying the piezoelectric constant (
d31) by the applied DC electric field (
E). The difference strain (δ
p) between δ and δ
cal increased with increasing applied DC field. On high DC electric field, the δ
p was saturated with compositions near the morphotropic phase boundary and the rhombohedral structure. We deduced that δ and δ
p were involved with the electric field dependence on rotation of domain which was measured by XRD analysis. These results indicated that the δ
p was caused by rotation of domain. The electric field dependence on the change of δ in the durability test, under repetitious DC electric field, was investigated. Higher applied DC electric field produced larger change of δ
cal and decreasing the δ
p. We found that the increase of δ
cal and the decrease of δ
p were caused by accelerating the polarization.
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