Fabrication and Microwave Dielectric Properties of Mg2SiO4‐LiMgPO4‐TiO2 Composite Ceramics

Complete solid solutions between Mg₂SiO₄ and LiMgPO₄ are confirmed by the XRD results. The phase constitution of 0.5Mg₂SiO₄‐0.5LiMgPO₄ is found to be dependent on firing temperature. The chemical compatibility between Mg₂SiO₄ and rutile phase at sintering temperature is modified by incorporating LiMgPO₄. The microwave dielectric properties of (1?y)(0.5Mg₂SiO₄‐0.5LiMgPO₄)‐yTiO₂ (y = 0–0.3) composite ceramics have been investigated. The optimized microwave dielectric properties for 0.35Mg₂SiO₄‐0.35LiMgPO₄‐0.3TiO₂ ceramics sintered at 1050°C show low dielectric constant (11.4), high‐quality factor (31 800 GHz), and low‐temperature coefficient of resonant frequency (?4 ppm/°C).