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- Title
Microstructure and Microwave Dielectric Properties of (1− x)MgAlO- x(CaSr)TiO Ceramics.
- Authors
Huang, Yafei; Yu, Jun; Shen, Chunying; Tang, Mingliang
- Abstract
The microwave dielectric properties of the (1− x)MgAlO- x(CaSr)TiO ( x = 0.02 to 0.10) ceramic system synthesized by the traditional solid-state reaction method have been investigated. Spinel-structured MgAlO was present together with perovskite-structured (CaSr)TiO, and this multiphase system was verified by x-ray diffraction (XRD) and energy spectrum analyses throughout the whole compositional range. With increasing x, the temperature coefficient of resonant frequency ( τ ) and permittivity ( ε ) gradually increased. Consequently, near-zero τ could be obtained for samples with x = 0.08. Excellent microwave dielectric properties with relative permittivity ( ε ) of 10.92, quality factor ( Q × f) of 52,563 GHz (at 12.9 GHz), and temperature coefficient of resonant frequency ( τ ) of −5.6 ppm/°C were obtained for 0.92MgAlO−0.08(CaSr)TiO composite sintered at 1440°C for 3 h, making this material a promising candidate for use in global communication satellites and radar detectors.
- Subjects
MAGNESIUM compound synthesis; DIELECTRIC properties; METAL microstructure; CERAMIC metals; SOLID state physics
- Publication
Journal of Electronic Materials, 2016, Vol 45, Issue 10, p4903
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-016-4533-2