High dielectric constant and high-Q in microwave ceramics of SrTiO3 co-doped with aluminum and niobium

被引：28
|
作者：
Chen, Siliang [1 ]
Li, Lingxia [1 ]
Yu, Shihui [1 ]
Zheng, Haoran [1 ]
Sun, Zheng [1 ]
机构：
[1] Minist Educ, Key Lab Adv Ceram, Sch Microelect, Machining Technol, Tianjin, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2018年 / 101卷 / 05期
基金：
中国国家自然科学基金;
关键词：
dielectric materials; properties; electroceramics; microwaves; SINTERING TEMPERATURE; ELECTRICAL-PROPERTIES; THIN-FILMS; BEHAVIOR; MODEL;
D O I：
10.1111/jace.15413
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：
Al/Nb co-doped SrTiO3 microwave ceramics with the composition of SrTi1-x(Al0.5Nb0.5)(x)O-3 (x = 0.03, 0.05, 0.1, and 0.15) have been synthesized via a standard solid-state reaction method. The substitution of (Al0.5Nb0.5)(4+) in B-site inhibits the reduction in Ti4+ ions and the growth of grain size, then the transport of mobile charge carriers is limited, and thus the Q value is improved. For the SrTi0.9(Al0.5Nb0.5)(0.1)O-3 ceramics, in addition to their high dielectric constant (epsilon(r) similar to 185), they exhibit correspondingly a high Qf value (similar to 9077 GHz) at 2.9 GHz, making the microwave ceramics suitable for myriad device miniaturization and high-performance wireless communication.
引用
收藏
页码：1835 / 1840
页数：6
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