Microwave dielectric properties of (1-x)La(Mg0.5Sn0.5)O3-x(Sr0.8Ca0.2)3Ti2O7 ceramic system with a near zero temperature coefficient of resonant frequency

2010 ◽  
Vol 45 (8) ◽  
pp. 830-834 ◽  
Author(s):  
Yih-Chien Chen ◽  
Yen-Nien Wang ◽  
Kai-Hao Chen
Keyword(s):  
Dielectric Properties ◽  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Microwave Dielectric Properties ◽  
Zero Temperature ◽  
Ceramic System ◽  
Microwave Dielectric

Shifting τf Value of (Mg0.95Co0.05)TiO3 Ceramics by Ca0.61Nd0.78/3TiO3 Addition

2013 ◽  
Vol 807-809 ◽  
pp. 2703-2706
Author(s):  
Ping Cheng Chen ◽  
Chung Long Pan ◽  
Wei Cheng Lin ◽  
Chun Hsu Shen
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Significant Role ◽  
Microwave Dielectric Properties ◽  
Dielectric Measurement ◽  
Zero Temperature ◽  
Microwave Dielectric

Modification of (Mg0.95Co0.05)TiO3ceramics by Ca0.61Nd0.78/3TiO3addition was investigated. The Ca0.61Nd0.78/3TiO3content plays a significant role in improving the dielectric properties. Microwave dielectric measurement showed an increase in dielectric constant (εr) and temperature coefficient of the resonant frequency (τf) and a decrease inQvalue with increasing Ca0.61Nd0.78/3TiO3content. By properly adjusting the Ca0.61Nd0.78/3TiO3content, zero temperature coefficient of resonate frequencyτfcan also be obtained. It becomes more promising in the application of wireless system.At 1375°C, the 0.85(Mg0.95Co0.05)TiO3-0.15Ca0.61Nd0.78/3TiO3ceramics possesses excellent microwave dielectric properties: a dielectric constant εr of 24.37, aQfvalue of 66200 ( at 7 GHz ) and a τf value of-1.4 ppm/°C.

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