The electromechanical properties of 〈110〉-oriented 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 crystals have been investigated under uniaxial stress (σ). 〈110〉-oriented crystals have a longitudinal electromechanical coupling coefficient (k33) of ∼0.9 and an acoustic power density of 12 dB which decreases to 8 dB with increasing σ between 0 and 4×107 N/m2. The results demonstrate that the advantages in terms of power density and coupling coefficient of oriented piezocrystals are not constrained to the 〈001〉-orientation, but rather can also be obtained along the 〈110〉.
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Viehland et al. (2003) studied this question.
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