Title :
Origin of the colossal permittivity and possible application of CCT ceramics
Author :
Lebey, Thierry ; Bley, Vincent ; Guillemet, Sophie ; Boulos, Madona ; Durand, Bernard
Author_Institution :
LGET, Univ. Paul Sabatier, Toulouse, France
fDate :
31 May-3 June 2005
Abstract :
The coprecipitation, a "soft chemistry" method is used to elaborate different CCT powders. After sintering three main types of materials were obtained: a monophased consisting of the pure CCT phase, a biphased (CCT + CaTiO3), and a three-phased (CCT + CaTiO3 + copper oxide (CuO or Cu2O)). Values of the relative permittivity up to 8 105 at 1 kHz may be obtained for the real part of the permittivity in some cases. The influence of the structure (presence of additional phases) on the dielectric properties of the ceramics is discussed.
Keywords :
calcium compounds; ceramics; permittivity; powders; precipitation; sintering; titanium compounds; 1 KHz; CCT ceramics; CCT powders; CaTiO3; colossal permittivity; coprecipitation; dielectric properties; soft chemistry method; Ceramics; Copper; Dielectric constant; Dielectric materials; Dielectrics and electrical insulation; Grain boundaries; Grain size; High-K gate dielectrics; Permittivity; Semiconductivity;
Conference_Titel :
Electronic Components and Technology Conference, 2005. Proceedings. 55th
Print_ISBN :
0-7803-8907-7
DOI :
10.1109/ECTC.2005.1441430
