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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.123  No.1437 (May) (2015)  >  pp.374-377

Journal of the Ceramic Society of Japan
<<Previous article Vol.123  No.1437 (May) (2015)   pp.374 - 377 Next article>>

Sintering temperature dependences of (1 − y)(Mg0.95Mn0.05)2(Ti0.95Sn0.05)O4y(Ca0.6La0.8/3)TiO3 microwave dielectric ceramics with a zero temperature coefficient of resonant frequency

Bing-Jing LI1), Sih-Yin WANG1), Guo-Jhe HONG1), Cheng-Liang HUANG1), Yuan-Bin CHEN2)
1) Department of Electrical Engineering, National Cheng Kung University 2) Department of Engineering and Management of Advanced Technology, Chang Jung Christian University

High-quality (1 − y)(Mg0.95Mn0.05)2(Ti0.95Sn0.05)O4y(Ca0.6La0.8/3)TiO3 ceramics were prepared by solid-state reaction. The products were characterized by scanning electron microscopy, X-ray diffraction, and network analyzer. (Mg0.95Mn0.05)2(Ti0.95Sn0.05)O4 has a dielectric constant (εr) of ~14.21, a high quality factor (Q×f) of ~347,000 GHz, and a temperature coefficient of resonant frequency (τf) of ~−57.94 ppm/°C. To produce a temperature-stable material, (Ca0.6La0.8/3)TiO3, which has a large positive τf value of +212 ppm/°C, was added to 0.65(Mg0.95Mn0.05)2(Ti0.95Sn0.05)O4–0.35(Ca0.6La0.8/3)TiO3 has an excellent combination of microwave dielectric properties: εr ~24.88, Q×f ~133,000, and τf = 0 ppm/°C sinter at 1325°C, and can be utilized in the fabrication of microwave devices.


Keyword:
Dielectric, Microwave ceramics, Dielectric resonators

Received: September 04, 2014
Accepted: January 16, 2015 , Published online: May 01, 2015

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