Electric‐Field‐Controlled Permittivity Ferroelectric Composition for Microwave LTCC Modules | Zendy

Hu Tao | Zendy; Jantunen Heli | Zendy; Deleniv Anatoli | Zendy; Leppävuori Seppo | Zendy; Gevorgian Spartak | Zendy

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Electric‐Field‐Controlled Permittivity Ferroelectric Composition for Microwave LTCC Modules

Author(s) -

Hu Tao,

Jantunen Heli,

Deleniv Anatoli,

Leppävuori Seppo,

Gevorgian Spartak

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.1551-2916.2004.00578.x

Subject(s) - materials science , permittivity , ferroelectricity , sintering , microwave , tape casting , microstructure , ceramic , dissipation factor , relative permittivity , electric field , composite material , ferroelectric ceramics , dissipation , dielectric , optoelectronics , telecommunications , physics , quantum mechanics , computer science , thermodynamics

A low‐temperature cofired ferroelectric ceramic composition for electrically tunable radio frequency devices is introduced. A sintering temperature of 950°C for BaSrTiO 3 –MgO was obtained following the combined addition of B 2 O 3 and Li 2 CO 3 . The effects of these sintering aids on densification, microstructure, and ferroelectric properties were investigated. The permittivity and dissipation factor values were 234 and 0.0010, respectively, measured at 286.3 K, 1 kHz. The electrically tunable ferroelectric structure for microwave measurement was fabricated throughout the tape‐casting process. Measured permittivity was 130 at 26 GHz and tunability >15% (4 V/μm).

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