期刊
RARE METALS
卷 37, 期 11, 页码 913-918出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-018-1104-0
关键词
Microwave dielectrics; Eu(Mg-0; 5Ti0.; 5)O-3; Complex perovskite; Solid-state reactions
资金
- National Basic Research Program of China [2015CB654902]
- National Natural Science Foundation of China [51390471, 51527803]
- National Key Research and Development Program [2016YFB0700402]
A new Eu-based microwave dielectric ceramic, Eu(Mg0.5Ti0.5)O-3 (EMT for short), was prepared through conventional solid-state reactions. The EMT ceramics were well densified at 1425 degrees C and exhibit good microwave dielectric properties with permittivity of 23.92, high quality factor (Q*f) of 66,957GHz at 8.93GHz and relatively low-temperature coefficient of resonant frequency of -20.3 10(-6)/K. Additionally, the variations of dielectric constants among Ln(Mg0.5Ti0.5)O-3 (Ln represents rare earth elements, LMT) compounds were analyzed. Ionic radii of Ln(3+), associated with the tolerance factors of the perovskite structure of LMT, were investigated to be the key factor to influence the permittivity. These results indicate that EMT ceramics might be one of the promising candidates as microwave resonators.
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