Dielectric properties of Ba1-xCaxTi2O 5 prepared by arc melting

Xinyan Yue, Rong Tu, Takashi Goto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

b-axis-oriented CaO substituted polycrystalline BaTi2O 5, Ba1-xCaxrTi2O5 (BCT2, x = O to 0.10), was prepared by arc melting. The dielectric property of BCT2 was investigated by an AC impedance method. The lattice parameters of BCT2 decreased with increasing CaO content in the range up to around x = 0.08. The remnant polarization (Pr) and coercive electric field (Ec) of polycrystalline BCT2 at x = 0.08 were 1.6 × 10-2Cm-2 and 0.4 × 10 6Vm-1, respectively. The Pr of polycrystalline BCT2 was larger than that of BaTi2O5 (BT 2, Pr = 0.9 × 10-2 Cm-2), while the Ec of BCT2 was smaller than that of polycrystalline BT2 (Ec = 0.7 × 106 Vm-1). The permittivity of BCT2 showed the maximum value of 4950 at x = 0.02 and a Curie temperature (Tc) of 736 K. The T c of BCT2 decreased from 750 to 665 K with increasing CaO content from 0 to 0.10.

Original languageEnglish
Pages (from-to)245-248
Number of pages4
JournalMaterials Transactions
Volume50
Issue number2
DOIs
Publication statusPublished - 2009 Feb 1

Keywords

  • Arc melting
  • BCT
  • Dielectric properties
  • Orientation
  • Polycrystals

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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