Structure–property relationships of novel microwave dielectric ceramics with low sintering temperatures: (Na0.5xBi0.5xCa1−x)MoO4

2014 ◽  
Vol 43 (31) ◽  
pp. 11888-11896 ◽  
Author(s):  
Jing Guo ◽  
Di Zhou ◽  
Yong Li ◽  
Tao Shao ◽  
Ze-Ming Qi ◽  
...  
Keyword(s):  
Microwave Dielectric Ceramics ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Microwave Dielectric ◽  
Dielectric Ceramics

A series of low firing microwave dielectric ceramics (Na0.5xBi0.5xCa1−x)MoO4 (0 ≤ x ≤ 0.6) was synthesized and their structure–property relationships were investigated.

scholarly journals Structure–property relationships of low sintering temperature scheelite-structured (1 − x)BiVO4–xLaNbO4 microwave dielectric ceramics

2017 ◽  
Vol 5 (10) ◽  
pp. 2695-2701 ◽  
Author(s):  
Li-Xia Pang ◽  
Di Zhou ◽  
Ze-Ming Qi ◽  
Wei-Guo Liu ◽  
Zhen-Xing Yue ◽  
...  
Keyword(s):  
Quality Factor ◽  
Sintering Temperature ◽  
Microwave Dielectric Ceramics ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Microwave Dielectric ◽  
Low Sintering Temperature ◽  
Dielectric Ceramics

A permittivity of ∼76.3 ± 0.5 and a quality factor >10 000 GHz were obtained in 0.94BiVO4–0.06LaNbO4 ceramic sintered at 800 °C.

scholarly journals The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

2021 ◽  
Vol 10 (5) ◽  
pp. 885-932
Author(s):  
Hongcheng Yang ◽  
Shuren Zhang ◽  
Hongyu Yang ◽  
Qingyu Wen ◽  
Qiu Yang ◽  
...  
Keyword(s):  
Dielectric Material ◽  
Synthesis Method ◽  
Microwave Dielectric Properties ◽  
Dielectric Materials ◽  
Microwave Dielectric Ceramics ◽  
Structure Property ◽  
Extrinsic Factors ◽  
Intrinsic Polarization ◽  
Microwave Dielectric ◽  
Dielectric Ceramics

AbstractThe explosive process of 5G communication evokes the urgent demand of miniaturized and integrated dielectric ceramics filter. It is a pressing need to advance the development of dielectric ceramics utilization of emerging technology to design new materials and understand the polarization mechanism. This review provides the summary of the study of microwave dielectric ceramics (MWDCs) sintered higher than 1000 from 2010 up to now, °C with the purpose of taking a broad and historical view of these ceramics and illustrating research directions. To date, researchers endeavor to explain the structure-property relationship of ceramics with multitude of approaches and design a new formula or strategy to obtain excellent microwave dielectric properties. There are variety of factors that impact the permittivity, dielectric loss, and temperature stability of dielectric materials, covering intrinsic and extrinsic factors. Many of these factors are often intertwined, which can complicate new dielectric material discovery and the mechanism investigation. Because of the various ceramics systems, pseudo phase diagram was used to classify the dielectric materials based on the composition. In this review, the ceramics were firstly divided into ternary systems, and then brief description of the experimental probes and complementary theoretical methods that have been used to discern the intrinsic polarization mechanisms and the origin of intrinsic loss was mentioned. Finally, some perspectives on the future outlook for high-temperature MWDCs were offered based on the synthesis method, characterization techniques, and significant theory developments.

scholarly journals L attice V ibrational C haracteristics , Crystal Structure s , and D ielectric P roperties of Li Mn PO 4  Microwave Dielectric Ceramics as a Function of Sintering Temperature

2021 ◽  
Author(s):  
xiangyu wang ◽  
encai xiao ◽  
Lingcui Zhang ◽  
Yue Xu ◽  
tong liu ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Sintering Temperature ◽  
Low Frequency ◽  
Solid State Reaction Method ◽  
Packing Fraction ◽  
Raman Shift ◽  
Microwave Dielectric Ceramics ◽  
Structure Property ◽  
Microwave Dielectric ◽  
Dielectric Ceramics

Abstract LiMnPO4 (LMP) microwave dielectric ceramics were manufactured at different temperatures via a standard solid-state reaction method, and the LMP ceramic sintered at 750 °C displayed dielectric properties of εr = 7.82, Q × f = 29,189 (f = 12.7 GHz). The lattice vibrational characteristics of LMP ceramics were studied utilizing both infrared reflection and Raman scattering spectroscopy to clarify the basic principle of the dielectric response. The intrinsic properties that were fitted and simulated based on the infrared spectra agreed with the measured property values. The low-frequency vibrational modes contributed more to the dielectric properties than the high-frequency modes. Upon increasing the temperature, the permittivity was positively correlated with the bond length but showed the opposite trend of the Raman shift of mode 9 Ag(υ1). The Q × f value was positively correlated with the packing fraction but negatively correlated with the FWHM of mode 10 Ag(υ3). Thus, the structure-property relationships of LMP ceramics were established as a function of sintering temperature.

Study on the (1-x)(Mg0.7Zn0.3)TiO3-x(Ca0.61Nd0.26)TiO3 Microwave Dielectric Ceramics

2010 ◽  
Vol 25 (3) ◽  
pp. 332-336
Author(s):  
Zheng-Dong LU ◽  
Chun-Ying SHEN ◽  
Liang LI ◽  
Jian YANG ◽  
Tai QIU
Keyword(s):  
Microwave Dielectric Ceramics ◽  
Microwave Dielectric ◽  
Dielectric Ceramics
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