圧電セラミックスにおける電界誘起歪の電界強度依存性

概要

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Electric field dependence of the strain characteristics on the (Pb, Ba, Sr) (Zr, Ti, Sn, Nb)0_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 (d_<31>) by the applied DC electric field (E). The differ . encestrain (δ_p) between δ and δ_<cal> increased with in creasing 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.at and decreasing the δ_p. We found that the increase of δ_p.at and the decrease of δ_p were caused by accelerating the polarization.
社団法人日本セラミックス協会の論文
1995-12-01