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Microwave Dielectric Properties and Far‐Infrared Reflectivity Characteristics of the CaTiO 3 –Li (1/2)−3 x Sm (1/2)+ x TiO 3 Ceramics
Author(s) -
Kim Woo Sup,
Yoon Ki Hyun,
Kim Eung Soo
Publication year - 2000
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.1151-2916.2000.tb01557.x
Subject(s) - far infrared , dielectric , analytical chemistry (journal) , materials science , microwave , infrared , infrared spectroscopy , reflectivity , octahedron , mineralogy , permittivity , calcium titanate , dielectric loss , chemistry , optics , crystallography , crystal structure , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics
Microwave dielectric properties and far‐infrared reflectivity spectra of the 0.3CaTiO 3 –0.7Li (1/2)−3 x Sm (1/2)+ x TiO 3 ceramics were investigated as a function of Sm 3+ substitution (0.0 ≤ x ≤ 0.12). The dielectric constant decreased as the Sm 3+ substitution increased. The Q × f value increased, up to a solid‐solution limit at x = 0.11, because of the change of vibration modes between the A‐site cation and the TiO 6 octahedron, and then decreased because of the formation of a secondary phase (Sm 2 Ti 2 O 7 ). On the analysis of the far‐infrared reflectivity spectra, in the 50–4000 cm −1 range, the change of the dielectric loss and dielectric constant could be explained by the intrinsic factor.