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  • Küçük Resim
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    Improvement of electroacoustic performance of new class v 'sea-shell' flextensional PMN-PZT transducers with texture orientation
    (Institute of Electrical and Electronics Engineers Inc., 2025) Berksoy Yavuz, Ayşe; Yalçın, Ezgi; Dursun, Sinan; Mensur, Ebru; Alkoy, Sedat
    Textured PMN-PZT ceramics doped with 1.5 mole% Mn were prepared and shaped in the form of convex shells. Texture was obtained using a combination of tape casting and templated grain growth (TGG) methods. PMN-PZT ceramic shells with randomly oriented equiaxial grains were also prepared as a reference. These textured ceramic shells were combined with similarly shaped metal caps to obtain the 'Sea-Shell' transducer, a new Class V flextensional design. A comparison of the electroacoustic performance of random and textured Mn-doped PMN-PZT Sea-Shell transducers revealed a 2.5 dB increase in peak value of the Transmitting Voltage Response while the -3dB bandwidth increased from 12 to 17 kHz compared to the random equiaxed counterpart. It was demonstrated that fabricating the Sea-Shell transducer from textured ceramics improved the electroacoustic performance.
  • Küçük Resim
    Yayın
    Structural and electrical properties of ⟨001⟩ textured 0.26PIN-0.40PMN-0.34PT ternary system
    (Springer, 2019) Berksoy Yavuz, Ayşe; Mensur Alkoy, Ebru; Gözütok, Ebru; Dursun, Sinan; Yılmaz, Hüseyin; Alkoy, Sedat
    Lead indium niobate (PIN)-lead magnesium niobate (PMN)-lead titanate (PT) solid solution in the ratio of 0.26PIN-0.40PMN-0.34PT was fabricated by tape-casting in random and < 001 > (pc) textured forms. PIN-PMN-PT was textured using 5 vol% barium titanate templates. The Lotgering factor, f, of 0.26PIN-0.40PMN-0.34PT textured ceramics was approximately calculated as 95%. Quenching from above the Curie temperature down to the room temperature was applied to both random and textured samples, which led to drastic increases in the ferroelectric and piezoelectric properties. The Curie temperature, dielectric constant (epsilon(r)), converse piezoelectric charge coefficient (d33*) and piezoelectric voltage constant (g(33)) of textured and quenched sample were found to be 223 degrees C, 2455, 1432 pm/V and 27.60 x 10(-3) Vm/N, respectively.