Effect of Nb5+ ion substitution on the dielectric property of BaTi2O5-Ba6Ti17O40 eutectic prepared by a floating zone method

Keiji Shiga, Stephan Wollstadt, Hirokazu Katsui, Takashi Goto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Ti4+ ions of the materials solidified from the BaTi2O5-Ba6Ti17O40 (BT2-B6T17) eutectic melt were substituted with 0-1.0 at% Nb5+ ions (CNb = 0-1.0 at%) by a floating zone method, and the effects of CNb on the microstructure, permittivity and Curie temperature of the BT2-B6T17 eutectics were studied. The BT2-B6T17 eutectics at CNb = 0-1.0 at% consisted of BaTi2O5 and Ba6Ti17O40. b- and a-axes of BaTi2O5 and Ba6Ti17O40, respectively, were parallel to the growth directions of the BT2-B6T17 eutectic. Ba6Ti17O40 in the BT2-B6T17 eutectic had the rod-like structure parallel to the growth direction in the matrix of BaTi2O5. As CNb increased from 0 to 1.0 at%, the permittivity at room temperature increased from 70 to 214 and the Curie temperature decreased from 748 to 679 K.

Original languageEnglish
Pages (from-to)191-195
Number of pages5
JournalMaterials Today: Proceedings
Volume16
DOIs
Publication statusPublished - 2019
Event6th International Symposium on Advanced Ceramics, ISAC 2018 - Sendai, Japan
Duration: 2018 Mar 102018 Mar 12

Keywords

  • BaTiO
  • Eutectic
  • Ferroelectric
  • Floating zone method

ASJC Scopus subject areas

  • Materials Science(all)

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