Microstructure and microwave dielectric properties of MgNb2O6–ZnTa2O6 composite ceramics prepared by layered stacking method

Zhang, Yun; Zhang, Yingchun; Fu, Baojian; Ming, Hong; Xiang, Maoqiao; Liu, Zhiang; Leng, Jiaxun

doi:10.1007/s10854-014-2331-2

Cited by 16 publications

(12 citation statements)

References 20 publications

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“…As a result, several unexpected chemical interactions occur between ZCZN and TZO/TCO/TO, resulting in the formation of unanticipated secondary phases (e.g., ZnTiNb 2 O 8 and Zn 0.15 Nb 0.3 Ti 0.55 O 2 ) and contributing to the worsening of their microwave dielectric characteristics 30,31 . As a result, the tri‐layered co‐fired technique successfully limits the chemical interactions between ZCZN and TZO/TCO/TO to a finite region (as illustrated in Figure 4), and the microwave dielectric characteristics are significantly enhanced 15–18,32 . Furthermore, for the ZCZN@TZO/TCO/TO system, a larger amount of TiO 2 needs to be added in order to be able to adjust the

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value of this system close to zero (compared to the ZCZN–TZO/TCO/TO–ZCZN tri‐layered architecture system), which is due to the phase transition process that occurs in the ZCZN@TZO/TCO/TO system as the TiO 2 content increases.…”

Section: Resultsmentioning

confidence: 99%

“…30,31 As a result, the tri-layered co-fired technique successfully limits the chemical interactions between ZCZN and TZO/TCO/TO to a finite region (as illustrated in Figure 4), and the microwave dielectric characteristics are significantly enhanced. [15][16][17][18]32 Furthermore, for the ZCZN@TZO/TCO/TO system, a larger amount of TiO 2 needs to be added in order to be able to adjust the 𝜏 𝑓 value of this system close to zero (compared to the ZCZN-TZO/TCO/TO-ZCZN tri-layered architecture system), which is due to the phase transition process that occurs in the ZCZN@TZO/TCO/TO system as the TiO 2 content increases. When the TiO 2 content is low, the wolframite phase (ZnZrNb 2 O 8 , JCPDS 48-0324) is mainly present in the system; hence, TiO 2 doping has little effect on its structure.…”

Section: Resultsmentioning

confidence: 99%

“…[9][10][11][12][13][14] Currently, MWDCs with two complimentary phases have been prepared using the laminated co-firing process. [15][16][17] Zn 3 Nb 2 O 8 -TiO 2 -Zn 3 Nb 2 O 8 ceramic was synthesized through layer-co-fired process by Luo et al They provided a suitable parallel mode, claiming that the transition layer at the heterogeneous interface is critical for the microwave responsiveness of this system. 16 Zhang et al investigated the effect of stacking mode on Q × f value using the ZnNb 2 O 6 -TiO 2 system.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, MWDCs with two complimentary phases have been prepared using the laminated co‐firing process 15–17 . Zn 3 Nb 2 O 8 –TiO 2 –Zn 3 Nb 2 O 8 ceramic was synthesized through layer‐co‐fired process by Luo et al.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…However, the organic glues would be aged along with the operating condition changes, which could cause structural and functional failures to microwave devices. As for some layer cofired MWDC systems, take ZnTa 2 O 6 /MgNb 2 O 6 /ZnTa 2 O 6 for instance, the two matrixes, ZnTa 2 O 6 and MgNb 2 O 6 , can well coexist and near‐zero τ f can be obtained for their composite ceramics through conventional mixed route . In this case, such multilayer ceramic architectures might not possess much advantage in microwave dielectric performance and practical applications when compared with their corresponding composite counterparts.…”

Section: Introductionmentioning

confidence: 99%

High‐Q and temperature‐stable microwave dielectrics in layer cofired Zn_1.01Nb₂O₆/TiO₂/Zn_1.01Nb₂O₆ ceramic architectures

et al. 2018

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A multilayer cofired architecture was proposed and demonstrated to achieve high-Q and temperature-stable microwave dielectrics in a derived system, Zn 1.01 Nb 2 O 6 -TiO 2 . This approach could effectively allow the chemical reactions between Zn 1.01 Nb 2 O 6 and TiO 2 occur at a rather narrow area (~12 μm), the interfaces of heterogeneous layers, where the diffusion of Zn, Nb, and Ti could be observed. Such interfaces could act as the in situ "glues" to connect each layer well. The effects of stacking scheme and TiO 2 content on the microwave dielectric properties of layered architectures were investigated systematically. The resonant frequency, Q-factor, and electric field distribution were reported using the eigenmode solver of high-frequency structure simulator. Among the available layer architectures, the optimized microwave dielectric characteristic was observed in Zn 1.01 Nb 2 O 6 /TiO 2 /Zn 1.01 Nb 2 O 6 stacked with 0.058 mol TiO 2 (~1.84 vol%).The τ f can be effectively tuned to approximately +0.53 ppm/°C, and importantly, a high Q × f value~99 500 GHz together with ε r~2 6.8 was achieved. This design could be beneficial for opening up new ways to develop high-performance microwave dielectrics based on current material systems and therefore to meet with the high requirements for 5G wireless communication components and multilayer packing technology. K E Y W O R D Sdielectric materials/

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List of Low‐Loss Ceramic Dielectric Materials and Their Properties

2017

Microwave Materials and Applications 2V Set

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AbbreviationsST = sintering temperature ( • C) r = relative permittivity , f = measurement frequency (GHz) f = coefficient of temperature variation of resonant frequency (ppm/ • C) No. = serial number Qf = quality factor frequency product (GHz)The table lists the key property data of microwave dielectric materials available from published materials. These data are the relative permittivity ( r ), the product of the Q-factor and the frequency (Qf ), the frequency of measurement (f), and the temperature coefficient of the resonant frequency ( f ). In tabulating these data, we make no judgment on the measurement method and the reliability of the result. It is known that the ceramic properties such as porosity, grain size, raw materials used, impurities, measurement methods, and equipment used for measurements affect the dielectric properties and readers should be aware that exact comparison of data on materials of identical composition and manufactured in different laboratories using different processing conditions and measured by different methods would be expected to lead to small variations in properties. The data of dielectric measurements carried out using impedance methods at low (MHz) frequency is excluded as the errors in these methods mean that a loss tangent less than 10 −3 is unreliable. The data are arranged in the order of increasing relative permittivity. The quality factor of the microwave dielectric ceramics decrease significantly with increasing relative permittivity, as shown in Figure A.1. The inset in the figure shows the variation of quality factor frequency product with Microwave Materials and Applications, First Edition. Edited by Mailadil T. Sebastian, Rick Ubic and Heli Jantunen.

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Microstructure and microwave dielectric properties of MgNb2O6–ZnTa2O6 composite ceramics prepared by layered stacking method

Cited by 16 publications

References 20 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

High‐Q and temperature‐stable microwave dielectrics in layer cofired Zn_1.01Nb₂O₆/TiO₂/Zn_1.01Nb₂O₆ ceramic architectures

List of Low‐Loss Ceramic Dielectric Materials and Their Properties

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Microstructure and microwave dielectric properties of MgNb2O6–ZnTa2O6 composite ceramics prepared by layered stacking method

Cited by 16 publications

References 20 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

High‐Q and temperature‐stable microwave dielectrics in layer cofired Zn1.01Nb2O6/TiO2/Zn1.01Nb2O6 ceramic architectures

List of Low‐Loss Ceramic Dielectric Materials and Their Properties

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High‐Q and temperature‐stable microwave dielectrics in layer cofired Zn_1.01Nb₂O₆/TiO₂/Zn_1.01Nb₂O₆ ceramic architectures