Sintering characteristics, Raman Spectra and the microstructure of novel low loss SrCeO3 ceramics
G He, W Zhang, Y Liu, Y Nie, Z Zhao, Y He… - Journal of Solid State …, 2024 - Elsevier
G He, W Zhang, Y Liu, Y Nie, Z Zhao, Y He, H Zhou
Journal of Solid State Chemistry, 2024•ElsevierFor 5G and upcoming 6G communication fields, microwave dielectric ceramics (MWDCs)
with low relative permittivity (ε r) and near-zero temperature coefficient of the resonant
frequency (τ f) in the microwave band are required. Herein, the novel low dielectric loss
(tanδ) SrCeO 3 ceramics were synthesized via solid-state reaction method, and its crystal
structure, microstructure, and microwave dielectric properties were investigated. The
Rietveld refinement results indicate that the SrCeO 3 ceramics present single-phase …
with low relative permittivity (ε r) and near-zero temperature coefficient of the resonant
frequency (τ f) in the microwave band are required. Herein, the novel low dielectric loss
(tanδ) SrCeO 3 ceramics were synthesized via solid-state reaction method, and its crystal
structure, microstructure, and microwave dielectric properties were investigated. The
Rietveld refinement results indicate that the SrCeO 3 ceramics present single-phase …
Abstract
For 5G and upcoming 6G communication fields, microwave dielectric ceramics (MWDCs) with low relative permittivity(εr) and near-zero temperature coefficient of the resonant frequency(τf) in the microwave band are required. Herein, the novel low dielectric loss(tanδ) SrCeO3 ceramics were synthesized via solid-state reaction method, and its crystal structure, microstructure, and microwave dielectric properties were investigated. The Rietveld refinement results indicate that the SrCeO3 ceramics present single-phase characteristics, and the orthorhombic structure with the pnma space group of ceramics is verified. A combination of decent microwave dielectric properties is realized at 1575 °C with εr = 26.24, quality factor by resonant frequency(Q×f) = 21191 GHz (at 6.86 GHz) and τf = −13.83 ppm/°C. Further analyses with Scanning Electron Microscopy (SEM) and Raman spectroscopy reveal that the Q × f values of the ceramics are directly proportional to the average grain size, while inversely proportional to the full width at half maximum (FWHM). These results indicate that the SrCeO3 ceramic is an ideal candidate for microwave applications.
Elsevier
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