In:
Journal of the American Ceramic Society, Wiley, Vol. 103, No. 8 ( 2020-08), p. 4321-4332
Abstract:
Crystal structure exerts dominant influence on the microwave dielectric performance enabling satisfying the demands for 5G communication system. In this study, the Ti‐doped Li 3 Mg 2 Nb 1‐x Ti x O 6‐x/2 ( x = 0.0‐0.1) ceramics were prepared by the solid‐state reaction procedure. Crystal structure refinement and microstructure analysis indicate pure phase with orthorhombic structure and homogeneous microstructure with grain size (~14 μm). The relative permittivity was affected by the relative density, cell volume, and polarizability. The Q × f value was dominated by the Nb‐O bond energy and grain size. The τ f value was correlated with the NbO 6 octahedral distortion and Nb‐O bond valence. Particularly, the composition ( x = 0.04) exhibited remarkable microwave dielectric performance: ε r = 15.88, Q × f = 131 000 GHz and τ f = −26.8 ppm/°C, providing a promising candidate for millimeter‐wave applications.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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