Influence of TiO2 addition on the sintering, dielectric, and mechanical properties of Li2(Mg0.96Ni0.04)SiO4 ceramic

The influence of TiO 2 addition on LMNS ceramic sintering, dielectric and mechanical properties was studied. The characterisation method includes X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, network analyser, mechanical analyser, simultaneous thermal analyser and dynamic mechanical analyser. A two-phase composite (TiO 2 and Li 2 (Mg 0.96 Ni 0.04 )SiO 4 ) was obtained as shown in XRD patterns. With the increasing amount of TiO 2 , the grain size and crystallite size decreased. The starting point of shrinkage moves to a higher temperature, the activation energy increased, and the elasticity and stiffness were enhanced. With a densified microstructure, a near-zero τ f (+ 1.03 ppm/°C) has obtained as x = 0.04, and other dielectric properties are that ε r = 6.29, Q × f = 57,000 GHz, and relative density = 96.33% sintered at 1100 °C.