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Ti deficiency effect on the dielectric response of CaCu3Ti4O12 ceramics
Nanjing University, Peoples R China.
Nanjing University, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2582-1740
Nanjing University, Peoples R China.
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2007 (English)In: Solid State Communications, ISSN 0038-1098, E-ISSN 1879-2766, Vol. 141, no 8, 440-444 p.Article in journal (Refereed) Published
Abstract [en]

Single phase ceramics CaCu3Ti4.0O12 and CaCu3Ti3.9O12 have been prepared using the traditional solid-state reaction method. Compared with the stoichiometric ceramics CaCu3Ti4.0O12, Ti-deficient ceramics CaCu3Ti3.9O12 have the larger lattice parameter, the higher force constant, and smaller dielectric constant and the lower dissipation factor, although their fundamental characters of dielectric response are similar. Their characteristic relaxation frequencies are not well fitted with the Arrhenius Law but a tentatively supposed relation. With the Cole-Cole Law, the fitted broadened factors of dissipation peaks are 0.5433 and 0.8651 for CaCu3Ti3.9O12 and CaCu3Ti4.0O12, respectively. All facts mentioned above imply that mutually correlated motion of Ti ions or defects may be expected to be responsible for the giant dielectric constant and high dissipation factor of CaCu3T4.0O12. (c) 2006 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
Elsevier , 2007. Vol. 141, no 8, 440-444 p.
Keyword [en]
Ti deficiency; relaxation; correlation
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-115716DOI: 10.1016/j.ssc.2006.12.004ISI: 000244515100004OAI: diva2:796078
Available from: 2015-03-18 Created: 2015-03-18 Last updated: 2015-03-30

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