In this work, nonstoichiometric MgTiO₃ ceramics were prepared by the sol–gel method. The crystalline structure, morphology, and microwave dielectric properties of the MgTi_0.98O_2.96 ceramics were investigated in detail. Compared to the samples prepared by the solid state method, the nonstoichiometric ceramics also had a high-density (~94.33% of the theoretical density) and high-quality factor (Q × f of 46,400 GHz). Meanwhile, the sintering characteristic was dramatically improved, making the densification sintering temperature reduce by 300 °C, from 1420 to 1120 °C. The lower temperature densification sintering can be ascribed to the high activity of the ceramic powders from the sol–gel process, the distortion of the octahedron, and the volume reduction of the unit cell. This study indicates that the sol–gel method is a promising way to prepare microwave materials, which can be applied in the efficient transmission of 5G wireless networks.

在这项工作中，通过溶胶-凝胶法制备了非化学计量的MgTiO ₃陶瓷。详细研究了MgTi _0.98 O _2.96陶瓷的晶体结构，形态和微波介电性能。与通过固态方法制备的样品相比，非化学计量陶瓷还具有高密度（约为理论密度的94.33％）和高品质因数（Q  ×  f46,400 GHz）。同时，烧结特性得到了显着改善，致密化烧结温度从1420降至1120°C，降低了300°C。较低的温度致密化烧结可以归因于溶胶-凝胶过程中陶瓷粉末的高活性，八面体的形变以及晶胞的体积减小。这项研究表明，溶胶-凝胶法是制备微波材料的一种有前途的方法，可用于5G无线网络的有效传输。