Infrared reflectivity spectra, complex chemical bond and microwave dielectric properties of Ce2[Zr1–x(Al1/2Sb1/2)x]3(MoO4)9 (0.02≤x≤0.10) ceramics

2021 ◽  
Author(s):  
Xu Zhou ◽  
Lin Zhang ◽  
Gui Wang ◽  
Xiaoqing Wang ◽  
Huanrong Tian ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Chemical Bond ◽  
Microwave Dielectric Properties ◽  
Complex Chemical ◽  
Infrared Reflectivity ◽  
Microwave Dielectric ◽  
Reflectivity Spectra

Raman/Infrared Spectra and Microwave Dielectric Properties of 0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3 Ceramics with MgO Additive

2018 ◽  
Vol 913 ◽  
pp. 473-479 ◽  
Author(s):  
Fan Fan Ning ◽  
Juan Jiang ◽  
Tian Jin Zhang
Keyword(s):  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Pure Perovskite Structure ◽  
Infrared Reflectivity ◽  
Microwave Dielectric ◽  
Reflectivity Spectra ◽  
Quality Factor Q ◽  
Different Content ◽  
The Relationship ◽  
Microwave Permittivity

0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3+ x wt% MgO (0.25 ≤ x ≤ 2.0) ceramics with pure perovskite structure were prepared by a conventional two-step solid-state reaction process. The effect of different content of MgO additive on the microwave dielectric properties of the 0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3ceramics was investigated in detail. The results of microwave dielectric properties showed that the permittivity (εr) and temperature coefficient of resonant frequency (τf) decreased gradually, while quality factor (Q×f) values increased when the x value increased. Raman spectra and infrared reflectivity spectra were used to study the relationship between vibrational modes and microwave dielectric properties. The harmonic oscillator model was used to fit infrared reflectivity spectra, and the obtained complex dielectric response was extrapolated down into the microwave region. It was found that the complex dielectric spectra were in good agreement with the measured microwave permittivity and dielectric loss. The 0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3+ 0.50 wt% MgO ceramic sintered at 1240°C for 4 h exhibited good microwave dielectric properties with εr= 102.6, Q×f = 5084 GHz (at 3.8 GHz), and τf= -16.3 ppm/°C.

scholarly journals Structural, infrared reflectivity spectra and microwave dielectric properties of the Li7Ti3O9F ceramic

2019 ◽  
Vol 45 (8) ◽  
pp. 10163-10169 ◽  
Author(s):  
Zhiwei Zhang ◽  
Liang Fang ◽  
Huaicheng Xiang ◽  
Minyu Xu ◽  
Ying Tang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Microwave Dielectric Properties ◽  
Infrared Reflectivity ◽  
Microwave Dielectric ◽  
Reflectivity Spectra
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