Structural transformation and microwave dielectric properties of Li4Mg2SbO6F ceramics

被引：1
作者：
Pei, Cuijin [1 ]
Liu, Hongkai [1 ]
Chen, Miao [1 ]
Shang, Feng [1 ]
Liu, Weihong [1 ]
Yao, Guoguang [1 ]
Liu, Jin [2 ]
Liu, Peng [3 ]
Wang, Fu [4 ]
Zhang, Huaiwu [5 ]
机构：
[1] Xian Univ Posts & Telecommun, Sch Sci, Xian 710121, Peoples R China
[2] Shaanxi Normal Univ, Sch Fine Arts, Xian 710062, Peoples R China
[3] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710062, Peoples R China
[4] Fourth Mil Med Univ, Sch Stomatol,Dept Prosthodont, State Key Lab Oral & Maxillofacial Reconstruct & R, Natl Clin Res Ctr Oral Dis,Shaanxi Key Lab Stomato, Xian 710032, Shaanxi, Peoples R China
[5] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2024年 / 50卷 / 23期
基金：
中国国家自然科学基金;
关键词：
Li4Mg2SbO6F ceramics; Microwave dielectric properties; Phase structure; Dielectric antenna; CHEMICAL-BOND; ENTROPY;
D O I：
10.1016/j.ceramint.2024.02.016
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A solid-state sintering process is used to fabricate Li4Mg2SbO6F oxyfluoride ceramics. The sintering behavior, phase structure as well as microwave dielectric performances of Li4Mg2SbO6F sintered bodies were studied. The phase transformation from cubic to orthorhombic occurred for Li4Mg2SbO6F ceramics sintered above 750 degrees C. The values of epsilon r, Q x f and tau f for Li4Mg2SbO6F ceramics were closely related to density, and configurational entropy caused by the phase transformation. The perfect microwave dielectric performances (epsilon r = 12.6, Q x f = 59,000 GHz (at 11.3 GHz), tau f =-37.0 ppm/K) could be acquired in Li4Mg2SbO6F ceramics following densification at 750 degrees C. A cylindrical dielectric resonator antenna was fabricated from the 0.15Li4Mg2SbO6F-0.85Li2SnO3 composite ceramics with close zero tau f, which showed good performances.
引用
收藏
页码：51718 / 51723
页数：6
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