Multilayer co-fired microwave dielectric ceramics in MgTiO3-Li2TiO3 system with linear temperature coefficient of resonant frequency

2021 ◽  
Vol 205 ◽  
pp. 114185
Author(s):  
Tao Yue ◽  
Lingxia Li ◽  
Mingkun Du ◽  
Yu Zhan
Keyword(s):  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Microwave Dielectric Ceramics ◽  
Linear Temperature ◽  
Microwave Dielectric ◽  
Dielectric Ceramics

scholarly journals Fundamental mechanisms responsible for the temperature coefficient of resonant frequency in microwave dielectric ceramics

2017 ◽  
Vol 100 (4) ◽  
pp. 1508-1516 ◽  
Author(s):  
Shengke Zhang ◽  
Hasan Sahin ◽  
Engin Torun ◽  
Francois Peeters ◽  
Dinesh Martien ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Microwave Dielectric Ceramics ◽  
Microwave Dielectric ◽  
Dielectric Ceramics

Preparation and Characterization of Citrate Sol-Gel Derived CaLa4Ti4O15 Microwave Dielectric Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 167-169
Author(s):  
Jing Pei ◽  
Zhen Xing Yue ◽  
Fei Zhao ◽  
Wei Li ◽  
Zhi Lun Gui ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Microwave Dielectric Ceramics ◽  
Zero Temperature ◽  
Microwave Dielectric ◽  
Dielectric Ceramics ◽  
Calcined Temperature

In this work hexagonal perovskite powders of CaLa4Ti4O15 were prepared by citrate sol-gel method. The calcined temperature was 1150oC, which is lower than that of the conventional solid method. Dense CLT ceramics were produced at sintering temperature of 1600oC. The crystal structures and microstructures were investigated by XRD, TEM and SEM, respectively. Compared with samples produced by solid method, the sol-gel derived CLT ceramics exhibited a near zero temperature coefficient of resonant frequency (τf ) of -6 ppm/oC, and other microwave properties , εr ~ 43, Q×f ~ 42000 GHz were also obtained. Moreover, the sintering temperature of the CLT ceramics could be reduced to 1400 oC by addition of B2O3-ZnO.

Dielectric properties of La-substituted Pb0.5Ca0.5[(Mg1/3Nb2/3)0.5Ti0.5]O3 ceramics

2001 ◽  
Vol 16 (7) ◽  
pp. 2053-2056
Author(s):  
X. J. Lu ◽  
X. M. Chen
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Resonant Frequency ◽  
Temperature Coefficient ◽  
Microwave Dielectric Properties ◽  
Present Approach ◽  
Calculated Temperature ◽  
Microwave Dielectric ◽  
La Substitution ◽  
Dielectric Ceramics

Modification of Pb0.5Ca0.5[(Mg1/3Nb2/3)0.5Ti0.5]O3 dielectric ceramics was performed by up to 20 mol% La substitution for Pb and Ca. The temperature coefficient of dielectric constant was significantly reduced by the present approach, while an increased Qf factor was achieved. Good microwave dielectric properties were obtained in a composition Pb0.425Ca0.425La0.1[(Mg1/3Nb2/3)0.5Ti0.5]O3: ε = 125; Qf = 3150 GHz; calculated temperature coefficient of resonant frequency δf = +253 ppm/°C.

scholarly journals Resonant frequency temperature stability of CaTiO3 based microwave dielectric ceramics

2013 ◽  
Vol 62 (11) ◽  
pp. 117702
Author(s):  
Shen Jie ◽  
Zhou Jing ◽  
Shi Guo-Qiang ◽  
Yang Wen-Cai ◽  
Liu Han-Xing ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Temperature Stability ◽  
Microwave Dielectric Ceramics ◽  
Microwave Dielectric ◽  
Dielectric Ceramics ◽  
Frequency Temperature
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