Dielectric Property of Polycrystalline ZrO<SUB>2</SUB> Substituted BaTi<SUB>2</SUB>O<SUB>5</SUB> Prepared by Arc-Melting

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  • Yue XinYan
    Institute for Materials Research, Tohoku University
  • Tu Rong
    Institute for Materials Research, Tohoku University
  • Goto Takashi
    Institute for Materials Research, Tohoku University

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  • Dielectric property of polycrystalline ZrO2 substituted BaTi2O5 prepared by arc-melting

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Abstract

ZrO2 substituted polycrystalline BaTi2O5, Ba(Ti1−yZry)2O5, (BT2Z), was prepared by arc-melting and the dielectric property was investigated by AC impedance spectroscopy. The length of a-axis increased from 1.6895 to 1.6952 nm and that of c-axis increased from 0.9411 to 0.9436 nm with increasing y up to 0.06. The b-axis was almost independent of ZrO2 content. The solubility limit of ZrO2 (y) in BT2Z can be 0.06. BT2Z had a strong b-axis orientation at y<0.06. The permittivity of BT2Z at y=0.005 showed the highest peak of 3050 at 725 K and the peak temperature decreased from 750 to 465 K with increasing y from 0 to 0.064. A relaxor-like frequency dependence of permittivity was observed at y>0.06.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 49 (1), 120-124, 2008

    The Japan Institute of Metals and Materials

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