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Role of strained nano-regions in the formation of subgrains in CaCu3Ti4O12
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10.1063/1.3610520
/content/aip/journal/jap/110/2/10.1063/1.3610520
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/2/10.1063/1.3610520
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) Characterization of surface morphology of a polished as-sintered sample. (a) The SEM micrograph shows that numerous nano-scale bumps have been revealed in most areas. (Note that charging occurred in some nano-bumps due to no conducting film being coated.) (b) AFM micrograph without being examined by SEM shows nano-bumps with height about 2.2 nm, confirming the SEM observation, and (c) AFM micrograph after SEM observation reveals nano-bumps with height about 6 nm as well as increasing numbers of nano-bumps.

Image of FIG. 2.
FIG. 2.

(Color online) (a) EBSD observations of a polished as-sintered sample without thermal etching, (b) the IQ values reveal a rapid drop at the nano-scale bump (B); and Kikuchi patterns of (c) matrix (A) and (d) a nano-scale bump (B), indicating that they are of the same structure and orientation.

Image of FIG. 3.
FIG. 3.

(Color online) SEM micrographs of the microstructures of polished CCTO ceramics with thermal etching but without conducting-film coating: (a) 990 °C, 32 min; (b) 990 °C, 52 min; (c) 990 °C, 72 min; (d) 980 °C, 72 min; and (e) 970 °C, 72 min; showing the development of etched pits and subgrains. (f) and (g) are the magnification of the marked areas of (b) and (e), respectively.

Image of FIG. 4.
FIG. 4.

(Color online) Schematic structures ({100}): (a) CaTiO3 as a precursor, (b) CCTO with Ca/Cu nano-scale disorders, (c) homogeneous CCTO.

Image of FIG. 5.
FIG. 5.

(Color online) EBSD observations of (a) a polished as-sintered sample with thermal etching, (b) The IQ values reveal a rapid drop at the nano-scale bump (B), and Kikuchi patterns of (c) matrix (A) and (d) a nano-scale bump (B), indicating that they are of the same structure and orientation.

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/content/aip/journal/jap/110/2/10.1063/1.3610520
2011-07-19
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Role of strained nano-regions in the formation of subgrains in CaCu3Ti4O12
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/2/10.1063/1.3610520
10.1063/1.3610520
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