Role of strained nano-regions in the formation of subgrains in CaCu 3Ti4O12

Tsang Tse Fang, Yong Huei Wang, Jui Chao Kuo

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6 Citations (Scopus)

Abstract

Single-phase CaCu3Ti4O12 (CCTO) was synthesized by solid-state reaction. Electron backscatter diffraction, scanning electron microscopy, and atomic force microscopy were adopted to characterize the grain orientation, microstructure, and surface morphology of the CCTO samples with or without thermal etching. Bump strained nano-regions induced by the local compositional disorder at a nano-scale have been discovered, being the origin of the formation of subgrains in CCTO. The proposed mechanism for the formation of subgrains involves the formation of etched pits and subboundaries pertaining to the strained nano-regions rather than dislocation displacement. The dielectric response inside the grains of CCTO relevant to the strained nano-regions is also discussed.

Original languageEnglish
Article number024103
JournalJournal of Applied Physics
Volume110
Issue number2
DOIs
Publication statusPublished - 2011 Jul 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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