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Very Low Loss Tangent and High Dielectric Permittivity in Pure‐ CaCu 3 Ti 4 O 12 Ceramics Prepared by a Modified Sol‐Gel Process
Author(s) -
Vangchangyia Somsack,
Swatsitang Ekaphan,
Thongbai Prasit,
Pinitsoontorn Supree,
Yamwong Teerapon,
Maensiri Santi,
Amornkitbamrung Vittaya,
Chindaprasirt Prinya
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05147.x
Subject(s) - dielectric , permittivity , dissipation factor , materials science , calcination , dielectric loss , ceramic , relative permittivity , composite material , analytical chemistry (journal) , mineralogy , chemistry , optoelectronics , chromatography , biochemistry , catalysis
We present a simple strategy to achieve excellent dielectric and nonlinear current–voltage properties for pure– CaCu 3 Ti 4 O 12 ceramics prepared by a modified sol–gel method with different calcining conditions. At 1 kHz and room temperature, the best CCTO ceramic can exhibit a high dielectric constant (ε′) of 9516 with a very low dielectric loss, tan δ ~0.020. The minimum value of tan δ is 0.018 at 2.5 kHz with ε′ ~9433. High breakdown field of 4032 V/cm and nonlinear coefficient of 7.05 were obtained.