Crystal structure, bond energy, Raman spectra, and microwave dielectric properties of Ti‐doped Li3Mg2NbO6 ceramics. Issue 8 (17th March 2020)

• Record Type: Journal Article
• Authors: Wang, Gang; Zhang, Dainan; Li, Jie; Gan, Gongwen; Rao, Yiheng; Huang, Xin; Yang, Yan; Shi, Liang; Liao, Yulong; Liu, Cheng; Jin, Lichuan; Zhang, Huaiwu
• Is Part Of: Journal of the American Ceramic Society. Volume 103:Issue 8(2020)
• Page Start: 4321
• Page End: 4332
• Publication Date: 2020-03-17
• Subjects: bond energy -- millimeter‐wave -- structure characteristics; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.17091
• Languages: English
• ISSNs: 0002-7820

Abstract

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 Li3 Mg2 Nb1‐x Tix O6‐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 NbO6 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.