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A New BaO‐TiO 2 Compound with Temperature‐Stable High Permittivity and Low Microwave Loss
Author(s) -
O'BRYAN H. M.,
THOMSON J.,
PLOURDE J. K.
Publication year - 1974
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.1151-2916.1974.tb11380.x
Subject(s) - temperature coefficient , materials science , dielectric , ceramic , permittivity , calcination , sintering , microwave , atmospheric temperature range , dielectric loss , phase (matter) , mineralogy , analytical chemistry (journal) , high κ dielectric , composite material , optoelectronics , chemistry , thermodynamics , telecommunications , biochemistry , physics , organic chemistry , chromatography , computer science , catalysis
The dielectric properties of ceramics in the TiO 2 ‐rich region of the BaO‐TiO 2 system were investigated. In the composition range between BaTi 4 O 9 and TiO 2 , another compound, Ba 2 Ti 9 O 20 , can be obtained when calcining and sintering conditions are controlled carefully. When dense and single‐phase, this ceramic has excellent dielectric and physical properties. At 4 GHz, the dielectric K = 39.8, Q = 8000, and τ K (temperature coefficient of dielectric constant) =−24 ± 2 ppm/°C.