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Ultra‐Low Fire Glass‐Free Li 3 FeMo 3 O 12 Microwave Dielectric Ceramics
Author(s) -
Liao Qingwei,
Wang Yunli,
Jiang Feng,
Guo Dong
Publication year - 2014
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/jace.13073
Subject(s) - raman spectroscopy , materials science , full width at half maximum , analytical chemistry (journal) , dielectric , phase (matter) , sintering , atomic packing factor , ceramic , mineralogy , chemistry , crystallography , composite material , optics , chromatography , physics , optoelectronics , organic chemistry
A new ultra‐low fire glass‐free microwave dielectric material Li 3 FeMo 3 O 12 was investigated for the first time. Single phase ceramics were obtained by the conventional solid‐state route after sintering at 540°C–600°C. The atomic packing fraction, FWHM of the A g oxygen‐octahedron stretching Raman mode and Qf values of samples sintered at different temperatures correlated well with each other. The sample with a Lower Raman shift showed a higher dielectric constant. Interestingly, the system also showed a distinct adjustable temperature coefficient of resonant frequency (from −84× 10 −6 /°C to 25 × 10 −6 /°C).
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