Title :
Structure and properties of high dielectric constant CaCu3Ti4O12 ceramics
Author :
Ren, W. ; Yu, Z. ; Krstic, V.D. ; Mukherjee, B.K.
Author_Institution :
Centre for Manufacturing of Adv. Ceramics & Nanomaterials, Queen´´s Univ., Kingston, Ont., Canada
Abstract :
The structure and dielectric properties of CaCu3Ti4O12 ceramics have been investigated. The starting CaCu3Ti4O12 powders were synthesized by a modified glycine nitrate process. The ceramics obtained exhibit a cubic perovskite structure. Dielectric constant up to 57,200 and dielectric loss of 4.4% at 1 kHz have been observed at room temperature. The dielectric properties have been investigated using an impedance spectroscopy technique. The effect of processing and microstructure on the dielectric properties has been discussed.
Keywords :
calcium compounds; ceramics; copper compounds; crystal microstructure; crystal structure; dielectric losses; dielectric materials; permittivity; powders; 1 kHz; 20 degC; CaCu3Ti4O12; CaCu3Ti4O12 ceramic structure; cubic perovskite structure; dielectric constant; dielectric loss; dielectric properties; impedance spectroscopy technique; microstructure; modified glycine nitrate process; processing; Amino acids; Capacitors; Ceramics; Dielectric losses; Dielectric materials; Economic indicators; Electrochemical impedance spectroscopy; High-K gate dielectrics; Powders; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 2004. ISAF-04. 2004 14th IEEE International Symposium on
Print_ISBN :
0-7803-8410-5
DOI :
10.1109/ISAF.2004.1418358
