A novel low-loss (1-x)(Ca0.8Sr0.2)TiO3-xSmAlO3 microwave dielectric ceramics with near-zero temperature coefficient

2021 ◽  
pp. 162809
Author(s):  
Ao Zhang ◽  
Huiqing Fan ◽  
Dingwei Hou ◽  
Fan Yang ◽  
Yanqin Chen ◽  
...  
Keyword(s):  
Temperature Coefficient ◽  
Microwave Dielectric Ceramics ◽  
Zero Temperature ◽  
Low Loss ◽  
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.

A novel low loss microwave dielectric ceramics ZnTi0.6Sn0.4Nb2O8 with wolframite structure

2016 ◽  
Vol 183 ◽  
pp. 341-345 ◽  
Author(s):  
C.F. Xing ◽  
J.X. Bi ◽  
H.J. Wang ◽  
Z.L. Yang ◽  
H.T. Wu
Keyword(s):  
Microwave Dielectric Ceramics ◽  
Low Loss ◽  
Microwave Dielectric ◽  
Dielectric Ceramics
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