Dielectric properties of poly- and single-crystalline BaTi 2O5

Rong Tu, Takashi Goto

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Non-oriented and (010) oriented poly-crystalline BaTi2O 5 (BT2) was prepared by hot-pressing and arc-melting, respectively. The dielectric properties of poly-crystalline BT2 were compared with those of single-crystalline BT2 prepared by a floating zone method. The maximum permittivity of (010) oriented poly-crystalline BT 2 was 2000 at 720 K, whereas that of single-crystalline BT 2 was 6000 at the Curie temperature, Tc (750 K). The permittivity of non-oriented poly-crystalline BT2 was 30 to 300, having a small peak at 720 K. The tan δ of all specimens was 0.01 to 0.2 below Tc and significantly increased with increasing temperature above Tc. The electrical conductivity of (010) oriented poly- and single-crystalline BT2 had almost same values, which were one order higher than that of non-oriented poly-crystalline BT2 and (001) oriented single-crystalline BT2.

Original languageEnglish
Pages (from-to)2898-2903
Number of pages6
JournalMaterials Transactions
Issue number12
Publication statusPublished - 2006 Dec
Externally publishedYes


  • Arc-melting
  • BaTiO
  • Curie temperature
  • Floating zone method
  • Hot-pressing
  • Permittivity
  • Poly-crystalline
  • Single-crystalline

ASJC Scopus subject areas

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


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