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Sr 3 LaNb 3 O 12 : A New Low Loss and Temperature Stable A 4 B 3 O 12 ‐Type Microwave Dielectric Ceramic
Author(s) -
Fang Liang,
Zhang Hui,
Yu Qian,
Su Heping,
Wu Bolin,
Cui Xueming
Publication year - 2009
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.1551-2916.2008.02917.x
Subject(s) - sintering , ceramic , materials science , temperature coefficient , dielectric , analytical chemistry (journal) , perovskite (structure) , hexagonal crystal system , mineralogy , mixed oxide , microstructure , phase (matter) , microwave , oxide , crystallography , chemistry , metallurgy , composite material , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics
The microwave dielectric properties of dense ceramics of a new A 4 B 3 O 12 type cation‐deficient hexagonal perovskite Sr 3 LaNb 3 O 12 are reported. Single‐phase powders can be obtained from the mixed‐oxide route at 1320°C and dense ceramics (>96% of the theoretical X‐ray density) with uniform microstructures (5–12 um) can be obtained by sintering in air at 1430°C. The ceramic exhibits a moderate dielectric constant ɛ r ∼36, a high quality factor Q × f ∼45 327 GHz, and a low temperature coefficient of resonant frequency τ f of −9 ppm/°C.