Dielectric properties and crystal structure of (Mg&lt;sub&gt;0.95&lt;/sub&gt;Ni&lt;sub&gt;0.05&lt;/sub&gt;)&lt;sub&gt;4&lt;/sub&gt;(Nb&lt;sub&gt;1&amp;minus;&lt;/sub&gt;&lt;i&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/i&gt;Ta&lt;i&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/i&gt;)&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;9&lt;/sub&gt; ceramics

The 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.

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

Yang

et al. 2021

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Synthesis and microwave dielectric properties of new high quality Mg₂NdNbO₆ ceramics

et al. 2017

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New high‐quality microwave dielectric ceramics Mg2NdNbO6 were prepared by conventional solid‐state sintering method. The phases, micro‐structures and microwave dielectric properties of Mg2NdNbO6 ceramics were investigated at sintering temperature in the range of 1275°C‐1400°C. The X‐ray diffraction patterns showed that the peaks of the compounds were attributed to two phases, including the main crystalline phase of NdNbO4 that was indexed as the monoclinic phase and MgO as the second phase. Well‐developed microstructures of Mg2NdNbO6 ceramics can be achieved, and the grain size reached the maximum value (1.63 μm) at 1375°C. As the sintering temperature increased, the dielectric constant, temperature coefficient of resonant frequency and apparent density remained almost unchanged, however, the significant change in the quality factor was observed. At 1375°C, Mg2NdNbO6 ceramics possessed excellent microwave dielectric properties: εr = 16.22, Q × f = 116 000 GHz and τf = −30.96 ppm/°C.

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Dielectric properties and crystal structure of (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)<sub>4</sub>(Nb<sub>1−</sub><i><sub>x</sub></i>Ta<i><sub>x</sub></i>)<sub>2</sub>O<sub>9</sub> ceramics

Cited by 2 publications

References 32 publications

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

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

Synthesis and microwave dielectric properties of new high quality Mg₂NdNbO₆ ceramics

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Dielectric properties and crystal structure of (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)<sub>4</sub>(Nb<sub>1&minus;</sub><i><sub>x</sub></i>Ta<i><sub>x</sub></i>)<sub>2</sub>O<sub>9</sub> ceramics

Cited by 2 publications

References 32 publications

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

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

Synthesis and microwave dielectric properties of new high quality Mg2NdNbO6 ceramics

Contact Info

Product

Resources

About

Dielectric properties and crystal structure of (Mg<sub>0.95</sub>Ni<sub>0.05</sub>)<sub>4</sub>(Nb<sub>1−</sub><i><sub>x</sub></i>Ta<i><sub>x</sub></i>)<sub>2</sub>O<sub>9</sub> ceramics

Synthesis and microwave dielectric properties of new high quality Mg₂NdNbO₆ ceramics