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Microwave Dielectric Properties of Li 2 WO 4 Ceramic with Ultra‐Low Sintering Temperature
Author(s) -
Zhou Di,
Randall Clive A.,
Pang LiXia,
Wang Hong,
Guo Jing,
Zhang GaoQun,
Wu XinGuang,
Shui Li,
Yao Xi
Publication year - 2011
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.1551-2916.2010.04312.x
Subject(s) - materials science , ceramic , temperature coefficient , sintering , relative permittivity , dielectric , microwave , permittivity , substrate (aquarium) , analytical chemistry (journal) , diffraction , composite material , mineralogy , optoelectronics , optics , chemistry , oceanography , physics , quantum mechanics , geology , chromatography
A new ultra‐low‐temperature firing microwave dielectric ceramic, Li 2 WO 4 with the phenacite structure, was prepared via solid‐state reaction method. The Li 2 WO 4 ceramic can be well sintered at 640°–660°C, with a microwave relative permittivity ∼5.5, a Q × f value about 62 000 GHz, and a negative temperature coefficient of −146 ppm/°C at 15.7 GHz. From an X‐ray diffraction analysis, the Li 2 WO 4 ceramic was found to be chemically compatible with both silver and aluminum powders at 640°C. All the results indicate that the Li 2 WO 4 ceramic is a promising candidate for ultra‐low temperature cofired ceramic technology, especially for dielectric substrate application.