Phase Stability,Dielectric and Piezoelectric Properties of the Pb(Sc1/2Nb1/2)O3-Pb(Zn1/3Nb2/3)O3-PbTiO3 Ternary Ceramic

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  • Yamashita Yohachi
    Materials and Devices Research Laboratories, R & D Center, Toshiba Corporation, 1 Komukai Toshiba–cho, Saiwai–ku, Kawasaki 210, Japan
  • Hosono Yasuharu
    School of Science and Engineering, Waseda University, 3–4–1 Ohkubo, Shinjuku–ku, Tokyo 169, Japan
  • Ichinose Noboru
    School of Science and Engineering, Waseda University, 3–4–1 Ohkubo, Shinjuku–ku, Tokyo 169, Japan

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タイトル別名
  • Phase Stability, Dielectric and Piezoelectric Properties of the Pb(Sc1/2Nb1/2)O3-Pb(Zn1/3Nb2/3)O3-PbTiO3 Ternary Ceramic Materials.
  • Phase Stability Dielectric and Piezoele
  • Phase Stability, Dielectric and Piezoelectric Properties of the Pb(Sc<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub>–Pb(Zn<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–PbTiO<sub>3</sub> Ternary Ceramic Materials

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The crystal structure and electrical properties of x]rm Pb(Sc1/2Nb1/2)O3- yPb(Zn1/3Nb2/3)O3- zPbTiO3 (PSZNT 100x/100y/100z) ternary ceramic materials have been systematically investigated. Stable perovskite-phase ceramics are obtained with less than 20 mol% of Pb(Zn1/3Nb2/3)O3 and more than 50 mol% of PbTiO3. Piezoelectric properties were found to peak at PSZNT 31/40/29, where the electromechanical coupling factor kp is 60%. The dielectric constant is 2, 020, and Curie temperature (T c) is 222 °C. An interesting property of PSZNT is a nonlinear T c change in terms of the composition. T c decreases with increasing PbTiO3 content in the range 0.3>z>0 and then increases with z>0.3. This nonlinear change in T c is explained as a site preference of Zn ions in the PSZNT system.

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