Phase structure and microwave dielectric properties of (1−x)Li2Zn3Ti4O12−xTiO2 ceramics

Liu, Xiaobin; Zhou, Huanfu; Chen, Xiuli; Fang, Liang

doi:10.1016/j.jallcom.2011.11.116

Cited by 25 publications

(7 citation statements)

References 19 publications

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“…and Zhang et al 34 . In summary, as indicated in Table S1, the random distribution process necessitates additional TZO/TCO/TO in order to reduce the

{\tau _f}

value of the system to near zero (±10 ppm/°C) 35–37 …”

Section: Resultsmentioning

confidence: 96%

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

et al. 2022

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Tri-layered structural Zn 0.997 Cu 0.003 ZrNb 2 O 8 -TiO 2 +ZnO/TiO 2 +CuO/TiO 2 -Zn 0.997 Cu 0.003 ZrNb 2 O 8 ceramics with different mass fractions of TiO 2 +ZnO/TiO 2 +CuO/TiO 2 were successfully prepared. The advantages of the multilayered design were completely demonstrated, and the microwave dielectric characteristics were modified by the components of each dielectric layer. In comparison to the random distribution-type, Zn 0.997 Cu 0.003 ZrNb 2 O 8 @TiO 2 +ZnO, this tri-layered construction could increase the Q × f value by approximately 100%. Meanwhile, based on the electronic compensation mechanisms, the Q × f value of the tri-layered structural ceramics with TiO 2 -doped interlayer can be increased by nearly 20% compared with that of the pure TiO 2 interlayer. The Zn 0.997 Cu 0.003 ZrNb 2 O 8 -TiO 2 +ZnO-Zn 0.997 Cu 0.003 ZrNb 2 O 8 tri-layered ceramic exhibited excellent dielectric characteristics (𝜀 𝑟 = 33.75, Q × f = 59 000 GHz, and 𝜏 𝑓 = +2.27 ppm/ • C) with 0.05 wt% TiO 2 +ZnO sintered at 1240 • C for 6 h, and the integrated optimization of microwave dielectric characteristics was achieved. This article provides a strategy for the synthesis of high-performance microwave dielectric components for application in 5G/6G wireless communication technologies.

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“…and Zhang et al 34 . In summary, as indicated in Table S1, the random distribution process necessitates additional TZO/TCO/TO in order to reduce the

{\tau _f}

value of the system to near zero (±10 ppm/°C) 35–37 …”

Section: Resultsmentioning

confidence: 96%

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

et al. 2022

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“…Figure demonstrates single‐phase ceramics in the LMTO ternary system. Dielectric properties of these ceramics are listed in Table . Except TiO 2 , they have dielectric constants (at microwave frequencies) ranging from 17 to 27.…”

Section: Resultsmentioning

confidence: 99%

Pseudo Phase Diagram and Microwave Dielectric Properties of Li₂O–MgO–TiO₂ Ternary System

Zhang

Zhou

2016

J. Am. Ceram. Soc.

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Li2O–MgO–TiO2 ternary system is an important microwave dielectric ceramic material with excellent properties and prospect in both scientific research and application. A phase diagram of the Li2O–MgO–TiO2 ternary system was established in this article, based on earlier research results and our present work. Microwave dielectric properties with compositions in different regions of the phase diagram have been analyzed. We found that the 0.33 Li2MgTi3O8–0.67 Li2TiO3 ceramics sintered at 1200°C exhibited excellent dielectric properties: Q × f value = 80 476 GHz (at 7.681 GHz), εr = 24.7, τf = +3.2 ppm/°C. We also designed two ceramic systems in the Li‐rich region of the Li2O–MgO–TiO2 ternary system, which received little attention in the past decades, because many excellent single‐phase ceramics, such as Li2MgTiO4, Li2MgTi3O8 and MgTiO3, have been found in the Ti‐rich region. The ceramic systems have low sintering temperatures but also relatively poor dielectric properties.

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“…It is said that the relative permittivity is significantly affected the density and secondary phases in composite . The ε r value of Li 2 ZnTi 3 O 8 and TiO 2 ceramics were about 25 and 100, respectively . Addition of 4 wt% TiO 2 nanoparticle as secondary phase to the LZT ceramic increased the relative permittivity and reached to 28.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, it should be shifted to near zero while maintaining high permittivity and quality factor. Generally, there are two methods to produce a material with a stable temperature coefficient: (i) Composite materials by mixing component materials with negative and positive τ f values, such as Zn 2 TiO 4 –TiO 2 , Li 2 ZnTi 3 O 8 –TiO 2 . (ii) Formation of solid solutions, such as complex perovskite .…”

Section: Introductionmentioning

confidence: 99%

Role of Nano‐ and Micron‐Sized Particles of TiO₂ Additive on Microwave Dielectric Properties of Li₂ZnTi₃O₈ – 4 wt% TiO₂ Ceramics

2013

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Microwave dielectric ceramics with the composition of Li2ZnTi3O8 – 4 wt% TiO2 were synthesized by the conventional solid‐state reaction. 4 wt% TiO2 powders with different particles size were added to the Li2ZnTi3O8 ceramic. Then the ceramic samples were sintered at temperatures 1075°C, 1050°C, 1000°C, and 950°C for 4 h. The effect of the particles size of TiO2 additive on the microwave dielectric properties of the ceramics has been investigated. In the study two categories of particles size of TiO2 additive have been used; (i) Nanoparticle (50 nm), (ii) Micron sized (40, 5, 1 μm) powder. X‐ray showed that the TiO2 additive has not solved in the LZT structure and has not almost undergone chemical reaction with the LZT ceramic. The results showed that the addition of TiO2 nanoparticles to the LZT ceramics significantly improved the density and a dense and uniform microstructure and also abnormal grain growth were observed by SEM. The use of TiO2 nanoparticle reduces porosity and leads to an increase in green density. The maximum density was found to be 98.5% of the theoretical density and the best relative permittivity of 28, quality factor of 68000 GHz and τf value of −2 ppm/°C were obtained for the samples added with 4 wt% of the TiO2 nanoparticles, sintered at 1050°C for 4 h.

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Phase structure and microwave dielectric properties of (1−x)Li2Zn3Ti4O12−xTiO2 ceramics

Cited by 25 publications

References 19 publications

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

Pseudo Phase Diagram and Microwave Dielectric Properties of Li₂O–MgO–TiO₂ Ternary System

Role of Nano‐ and Micron‐Sized Particles of TiO₂ Additive on Microwave Dielectric Properties of Li₂ZnTi₃O₈ – 4 wt% TiO₂ Ceramics

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Phase structure and microwave dielectric properties of (1−x)Li2Zn3Ti4O12−xTiO2 ceramics

Cited by 25 publications

References 19 publications

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

Enhanced high dielectric characteristics tri‐layered structural ceramics for 5G/6G communications

Pseudo Phase Diagram and Microwave Dielectric Properties of Li2O–MgO–TiO2 Ternary System

Role of Nano‐ and Micron‐Sized Particles of TiO2 Additive on Microwave Dielectric Properties of Li2ZnTi3O8 – 4 wt% TiO2 Ceramics

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Product

Resources

About

Pseudo Phase Diagram and Microwave Dielectric Properties of Li₂O–MgO–TiO₂ Ternary System

Role of Nano‐ and Micron‐Sized Particles of TiO₂ Additive on Microwave Dielectric Properties of Li₂ZnTi₃O₈ – 4 wt% TiO₂ Ceramics