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High Dielectric Constant and Low‐Loss Microwave Dielectric Ceramics Using (Zn 0.95 M 2+ 0.05 )Ta 2 O 6 (M 2+ =Mn, Mg, and Ni) Solid Solutions
Author(s) -
Huang ChengLiang,
Chen JhihYong,
Tseng YuWei,
Jiang ChangYang,
Huang GuanSian
Publication year - 2010
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.1551-2916.2010.03848.x
Subject(s) - dielectric , materials science , ceramic , analytical chemistry (journal) , lattice constant , sintering , dielectric loss , microwave , crystal structure , temperature coefficient , high κ dielectric , mineralogy , diffraction , crystallography , optics , metallurgy , chemistry , composite material , optoelectronics , physics , chromatography , quantum mechanics
High dielectric constant and low‐loss ceramics in the (Zn 0.95 M 2+ 0.05 )Ta 2 O 6 (M 2+ =Mn, Mg, and Ni) ceramic family have been prepared by the conventional mixed‐oxide route and their crystal structures and microwave dielectric properties have been investigated. The forming of (Zn 0.95 M 2+ 0.05 )Ta 2 O 6 (M 2+ =Mn, Mg, and Ni) solid solutions was confirmed by the X‐ray diffraction patterns, high‐resolution transmission electron microscopic lattice images, the energy‐dispersive X‐ray analysis, and the measured lattice parameters. The dielectric properties exhibited a significant dependence on the sintering condition and crystal structure of the ceramics. A fine combination of microwave dielectric properties can be achieved in the (Zn 0.95 Mn 0.05 )Ta 2 O 6 ceramics sintered at 1325°C for 2 h with a dielectric constant of ∼38.56, a Q × f value of ∼92 700 GHz (where f =7.64 GHz, is the resonant frequency), and a temperature coefficient of resonant frequency (τ f ) of ∼8.9 ppm/°C. It is proposed as a suitable candidate material for small‐sized global positioning system patch antennas.