Enhanced dielectric and microwave absorption properties of Y2Ti2O7 ceramics by Sr doping

被引：8
|
作者：
Wen, Qinlong [1 ]
Zhou, Wancheng [1 ]
Gao, Hui [1 ]
Zhou, Yingying [1 ,2 ]
Luo, Fa [1 ]
Zhu, Dongmei [1 ]
Huang, Zhibin [1 ]
Qing, Yuchang [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Xian Aeronaut Univ, Sch Mat Engn, Xian 710077, Shaanxi, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2019年 / 125卷 / 06期
基金：
中国国家自然科学基金;
关键词：
IONIC-CONDUCTIVITY; THERMAL-PROPERTIES; MICROSPHERES; PYROCHLORES; EMISSION;
D O I：
10.1007/s00339-019-2702-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Sr-doped Y2Ti2O7 has been synthesized by hot-pressing sintering in the vacuum with graphite die. The thermogravimetric analysis, electrical conductivity, dielectric and microwave absorption properties of Y2-xSrxTi2O7- (x=0.05, 0.1, 0.15, 0.2) investigated. The epsilon of Y1.8Sr0.2Ti2O7- is four times larger than the pure Y2Ti2O7 and twice larger than that of Y1.8Ca0.2Ti2O7- at 8.2GHz. The epsilon'' of Y2-xSrxTi2O7- is also enhanced significantly. The reflection loss of Y0.85Sr0.15Ti2O7- with a thickness of 0.85mm reaches a maximum absorbing peak of -29.68dB and bandwidth (reflection loss-5dB) of 2.9GHz. These findings pave the way for the development of high dielectric constant materials operating in the 8.2-12.4GHz region with potential applications in thin and efficient microwave absorber.
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页数：8
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