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Mg 0.95 Ni 0.05 TiO 3 ceramics were prepared by traditional solid-state route using sintering temperatures between 1300 and 1425 °C and holding time of 2-8 h. The sintered samples were characterized for their phase composition, micro-crystalline structure, unit-cell constant, and dielectric properties. A two-phase combination region was identified over the entire compositional range. The effect of sintering conditions was analyzed for various properties. Both permittivity ( ε r  ) and Q factor (Q  f  ) were sensitive to sintering temperatures and holding times, and the optimum performance was found at 1350 °C withholding time of 4 h. The temperature coefficient of resonant frequency ( τ f  ) in a range from -45.2 to -52 (ppm/°C) and unit-cell constant were not sensitive to both the sintering temperature and holding time. An optimized Q factor of 192,000 (GHz) related with a permittivity ( ε r  ) of 17.35 and a temperature coefficient ( τ f  ) of -47 (ppm/°C) was realized for the specimen sintered at 1350 °C withholding time of 4 h. For applications of 5G communication device (filter, antennas, etc.), Mg 0.95 Ni 0.05 TiO 3 is considered to be a suitable candidate for substrate materials.

A Study of the Effect of Sintering Conditions of Mg0.95Ni0.05Ti3 on Its Physical and Dielectric Properties