Abstract: The research progress in crystal structure, low-temperature sintering and modification of Ln(B1/2Ti1/2)O3-type (B=Mg, Zn, Co) microwave dielectric ceramics is reviewed. A small amount of sintering aids can effectively reduce the sintering temperature, whilst it sometimes deteriorates the quality factor (Q×f) of the ceramics. Ion substitution can improve the Q×f value significantly, but it has no discernible effect on the temperature coefficient of resonant frequency (tf). Composite modification can adjust tf to a near-zero value easily. Finally, some existing problems and development trends in this field are analyzed. Simplifying and optimizing the preparation process, realizing the low-temperature sintering and adjusting tf, and enhancing the mechanism studies on the low-temperature sintering, ion substitution and composite modification will be the important subjects in the future research on Ln(B1/2Ti1/2)O3 ceramics.

Key words: Ln(B1/2Ti1/2)O3, microwave dielectric ceramics, crystal structure, ow-temperature sintering, modification

摘要： 综述了Ln(B1/2Ti1/2)O3 (B=Mg, Zn, Co)型微波介质陶瓷的结构、低温烧结及改性研究现状. 少量烧结助剂可有效降低陶瓷的烧结温度，但有时会恶化品质因数(Q×f). 离子取代可显著提高Q×f值，对谐振频率温度系数(τf)无明显影响；而复合改性则可有效调节τf值至近0. 最后探讨了Ln(B1/2Ti1/2)O3型微波介质陶瓷研究中存在的问题和未来的发展趋势，简化和优化合成工艺、实现低温烧结和调节谐振频率温度系数、加强低温烧结、离子取代和复合改性的机理研究是未来重要的研究方向.

关键词: Ln(B1/2Ti1/2)O3, 微波介质陶瓷, 晶体结构, 低温烧结, 改性