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Tunable Microwave Properties of Barium Titanate‐Based Ferroelectric Glass‐Ceramics
Author(s) -
Kageyama Keisuke,
Takahashi Junichi
Publication year - 2004
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.1551-2916.2004.01602.x
Subject(s) - materials science , dielectric , barium titanate , ferroelectricity , microwave , curie temperature , ceramic , titanate , analytical chemistry (journal) , mineralogy , composite material , optoelectronics , condensed matter physics , chemistry , chromatography , quantum mechanics , ferromagnetism , physics
BaTiO 3 ‐based ferroelectric glass‐ceramics with the composition 0.65(Ba 1− X Sr X )TiO 3 ·0.27SiO 2 ·0.08Al 2 O 3 ( X = 0.2–0.6) were fabricated, and their tunable dielectric properties were measured at microwave frequency. Major crystalline phases that precipitated during thermal treatment up to 1000°C were (Ba,Sr)TiO 3 , Ba 2 TiSi 2 O 8 , and BaAl 2 Si 2 O 8 . The Curie temperatures of the heated bulk samples were successfully tuned near room temperature at the composition between X = 0.2 and 0.3. A thick‐film sample with X = 0.3 showed 27% tunability at 5 GHz under 10 kV/cm bias voltage.