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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Role of oxygen on the phase stability and microstructure evolution of CaCu3Ti4O12 ceramics

Full text
Author(s):
Felix, Anderson A. ; Bezzon, Vinicius D. N. ; Orlandi, Marcelo O. ; Vengust, Damjan ; Spreitzer, Matjaz ; Longo, Elson ; Suvorov, Danilo ; Varela, Jose A.
Total Authors: 8
Document type: Journal article
Source: Journal of the European Ceramic Society; v. 37, n. 1, p. 129-136, JAN 2017.
Web of Science Citations: 20
Abstract

Phase stability and microstructure evolution of polycrystalline CaCu3Ti4O12 (CCTO) ceramics were studied by controlling the partial pressure of oxygen (from a poor to an oxygen rich atmosphere) during the sintering process at high temperatures. The samples were analyzed by X-ray powder diffraction, scanning electron microscopy and X-ray energy dispersive spectroscopy. Our results show that the oxygen partial pressure during the sintering process is an important parameter that controls the phase stability, non-stoichiometry, and decomposition process of the CCTO phase as well as the densification and grain growth mechanisms on these polycrystalline ceramics. These results provided us further insight into the important role of copper reduction and copper/oxygen diffusion on the crystalline structure and morphological characteristics of polycrystalline CCTO ceramics. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 09/00367-6 - Study of Properties of CaCu3Ti4O12 Nanostructured Films.
Grantee:Anderson André Felix
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/14647-6 - Gas sensors based on p-type metal semiconductor oxides: in-situ and operando advanced studies
Grantee:Anderson André Felix
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 12/51195-3 - Modeling effects of sensor response of semiconducting oxide with functionalized nanoparticles
Grantee:José Arana Varela
Support Opportunities: Regular Research Grants