Dielectric properties and microstructure of Nb-Co codoped BaTiO 3-(Bi0.5Na0.5)TiO3 ceramics

Hsing I. Hsiang, Li Then Mei, Yi Jih Chun

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20 Citations (Scopus)

Abstract

X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, and an impedance analyzer were used to examine the Nb-Co codoping effects on the densification, crystalline phase, microstructure development, and dielectric-temperature characteristics of BaTiO3-(Bi 0.5Na0.5)TiO3 ceramics. The results indicate that the Curie temperature shifted to a higher temperature (above 140°C) by adding BNT. The dielectric constant-temperature (ε-T) curve broadened at the Curie temperature due to the small grain size (0.3-0.4 μm). A core-shell structure was developed, which is helpful to flatten the ε-T curve of BaTiO3 ceramics at high temperatures.

Original languageEnglish
Pages (from-to)2768-2771
Number of pages4
JournalJournal of the American Ceramic Society
Volume92
Issue number11
DOIs
Publication statusPublished - 2009 Nov 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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