公开(公告)号：US11629102B2

公开(公告)日：2023-04-18

申请号：US17084655

申请日：2020-10-30

Applicant: University of Electronic Science and Technology of China

Inventor： Cheng Liu ,  Hongyang Zhang ,  Qinghui Yang ,  Lichuan Jin ,  Yuanxun Li ,  Huaiwu Zhang

IPC: C04B35/626 ,  H01B3/12

Abstract: A Li3Mg2SbO6-based microwave dielectric ceramic material easy to sinter and with high Q value, and a preparation method thereof are disclosed. A chemical formula of the material is Li3(Mg1-xZnx)2SbO6, wherein 0.02≤x≤0.08. The preparation method includes: 1) mixing and ball-milling Sb2O3 and Li2CO3 according to a chemical ratio and then drying, and conducting pre-sintering to obtain a Li3SbO4 phase; and 2) mixing and ball-milling MgO, ZnO and Li3SbO4 powder according a chemical ratio of Li3(Mg1-xZnx)2SbO6 and then drying, conducting granulation and sieving after adding an adhesive, pressing into a cylindrical body, and sintering the cylindrical body into ceramic in the air at 1325° C. and under normal pressure, wherein a dielectric constant is 7.2-8.5, a quality factor is 51844-97719 GHz, and a temperature coefficient of resonance frequency is −14-1 ppm/° C.