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Article Dans Une Revue Journal of the Ceramic Society of Japan Année : 2017

Growth and characterization of strontium-substituted Ca2Al2SiO7 piezoelectric single crystals

Résumé

We report the effect of Sr substitution on the structural, electrical, and mechanical properties of Ca2Al2SiO7 (CAS) piezoelectric single crystals for high-temperature pressure sensors. Single crystals of Sr-substituted CAS (Sr-CAS) with a nominal chemical composition of CaSrAl2SiO7 were grown by using the Czochralski technique. The single-crystal X-ray structure analysis revealed that Sr atoms were placed in the Ca decahedral sites, which decreased the polyhedral distortion slightly. The piezoelectric modulus d′31 and electrical resistivity of Sr-CAS measured at 23°C were slightly lower than those of CAS, but still sufficient for the satisfactory performance of the produced sensors. The rupture strength of the Sr-CAS crystal was 230 MPa, 1.2 times higher than that of a CAS crystal. The obtained results suggest that Sr-CAS crystals can be candidate materials for high-temperature pressure sensors.

Dates et versions

hal-02295204 , version 1 (24-09-2019)

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Citer

Hiroaki Takeda, Kyohei Yoshida, Hiroki Okudera, Kheirreddine Lebbou, Takuya Hoshina, et al.. Growth and characterization of strontium-substituted Ca2Al2SiO7 piezoelectric single crystals. Journal of the Ceramic Society of Japan, 2017, 125, pp.23-26. ⟨10.2109/jcersj2.16206⟩. ⟨hal-02295204⟩
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