Role of doping and CuO segregation in improving the giant permittivity of CaCu3Ti4O12

Articolo

Data di Pubblicazione:

2004

Abstract:

The dopant role on the electric and dielectric properties of the perovskite-type CaCu3Ti4O12 (CCTO) compound is evidenced. Impedance spectroscopy measurements show that the relevant permittivity value attributed to sintered CCTOis due to grain boundary (g.b.) effects. The g.b. permittivity value of the pure CCTOcan be increased of 12 orders of magnitude by cation substitution on Ti site and/or segregation of CuO phase, while the bulk permittivity keeps values 90

Tipologia CRIS:

01.01 Articolo in rivista

Keywords:

CaCu3Ti4O12; CCTO; giant permittivity; dielectrici; Perovskiti

Elenco autori:

Capsoni, Doretta; Massarotti, Vincenzo; Chiodelli, Gaetano

Link alla scheda completa:

https://iris.cnr.it/handle/20.500.14243/21769

Pubblicato in:

JOURNAL OF SOLID STATE CHEMISTRY (PRINT)

Journal