Li₂ZnTi₃O₈ Microwave Dielectric Ceramics Prepared by the Reaction-Sintering Process

Abstract:

Li₂ZnTi₃O₈ ceramics were prepared by reaction-sintering process (calcination free). The crystal phase and microstructure were investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). A pure phase of Li₂ZnTi₃O₈ ceramics sintered at 1075 °C-1150 °C with cubic spinel structure was confirmed by XRD. The microwave dielectric properties (ε_r, Qxf) of Li₂ZnTi₃O₈ ceramics were strongly dependent on the densification and grain size. The τ_f of Li₂ZnTi₃O₈ ceramics was almost independent with the sintering temperatures. In particular, Li₂ZnTi₃O₈ ceramics by reaction-sintering method sintered at 1125 °C for 5 h exhibited good combination microwave dielectric properties of ε_r=21.7, Q×f=70 500 GHz (at 7.5 GHz) and τ_f=-13 ppm/°C.

• Periodical: Key Engineering Materials (Volume 655)
• Pages: 164-167
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.655.164
• Online since: July 2015
• Authors: Xu Sheng Hu, Guo Guang Yao, Xiu Lao Tian
• Keywords: Li₂ZnTi₃O₈, Microwave Dielectric Properties, Reaction-Sintering

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