Li3Mg2SbO6-based microwave dielectric ceramic material easy to sinter and with high q value, and preparation method therefor

US11629102B2 · kind B2 · utility

Assignee

• University of Electronic Science and Technology of China · CN

Inventors

• Cheng-Shing Liu · Beijing, CN
• Hongyang Zhang · Vancouver, CA
• Qinghui Yang · Chengdu, CN
• Lichuan Jin · Chengdu, CN
• Yuanxun Li · Shanghai, CN
• Huaiwu Zhang · Chengdu, CN

Key dates

• Filing date: Oct 30, 2020
• Grant date: Apr 18, 2023
• Expiry date: Sep 18, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/96
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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.