Sintering characteristics, phase transitions, and microwave dielectric properties of low-firing [(Na0.5Bi0.5)xBi1−x](WxV1−x)O4 solid solution ceramics

Xian Xue; Xiaomeng Li; Changli Fu; Yan Zhang; Jing Guo; Hong Wang

doi:10.26599/JAC.2023.9220747

Journal of Advanced Ceramics 2023, 12(6): 1178-1188 https://doi.org/10.26599/JAC.2023.9220747

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Open Access | Issue | Published: 09 May 2023

Sintering characteristics, phase transitions, and microwave dielectric properties of low-firing [(Na_0.5Bi_0.5)_xBi_1−x](W_xV_1−x)O₄ solid solution ceramics

Show Author's Information Hide Author's Information Xian Xue^{^a}, Xiaomeng Li^{^b}, Changli Fu^{^b}, Yan Zhang^{^d}, Jing Guo^{^b}(

), Hong Wang^{^c}(

)

aState Key Laboratory for Mechanical Behavior of Materials, Faculty of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China

bState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

cDepartment of Materials Science and Engineering & Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices, Southern University of Science and Technology, Shenzhen 518055, China

dDepartment of Physiology and Pathophysiology, Shaanxi Engineering and Research Center of Vaccine, Key Laboratory of Environment and Genes Related to Diseases of Education Ministry of China, School of Basic Medical Sciences, Xi’an Jiaotong University, Xi’an 710061, China

Keywords:

microwave ceramics, dielectric behavior, structural phase transition, order–disorder phenomena, low sintering temperatures

Cite this article:

Xue X, Li X, Fu C, et al. Sintering characteristics, phase transitions, and microwave dielectric properties of low-firing [(Na_0.5Bi_0.5)_xBi_1−x](W_xV_1−x)O₄ solid solution ceramics. Journal of Advanced Ceramics, 2023, 12(6): 1178-1188. https://doi.org/10.26599/JAC.2023.9220747

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Abstract

A series of high-k [(Na_0.5Bi_0.5)_xBi_1−x](W_xV_1−x)O₄ (abbreviated as NBWV(x value)) solid solution ceramics with a scheelite-like structure are synthesized by a modified solid-state reaction method at the temperature range of 680–760 ℃. A monoclinic (0 ≤ x < 0.09) to tetragonal scheelite (0.09 ≤ x ≤ 1.0) structural phase transition is confirmed by X-ray diffraction (XRD), Raman, and infrared (IR) analyses. The effect of structural deformation and order–disorder caused by Na⁺/Bi³⁺/W⁶⁺ complex substitution on microwave dielectric properties is investigated in detail. The compositional series possess a wide range of variable relative permittivity (ε_r = 24.8–80) and temperature coefficient of resonant frequency (TCF value, −271.9–188.9 ppm/℃). The maximum permittivity of 80 and a high Q×f value of ~10,000 GHz are obtained near the phase boundary at x = 0.09. Furthermore, the temperature-stable dielectric ceramics sintered at 680 ℃ with excellent microwave dielectric properties of ε_r = 80.7, Q×f = 9400 GHz (at 4.1 GHz), and TCF value = −3.8 ppm/℃ are designed by mixing the components of x = 0.07 and 0.08. In summary, similar sinterability and structural compatibility of scheelite-like solid solution systems make it potential for low-temperature co-fired ceramic (LTCC) applications.

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Sintering characteristics, phase transitions, and microwave dielectric properties of low-firing [(Na_0.5Bi_0.5)_xBi_1−x](W_xV_1−x)O₄ solid solution ceramics

Show Author's information Hide Author's Information Xian Xue^{^a}, Xiaomeng Li^{^b}, Changli Fu^{^b}, Yan Zhang^{^d}, Jing Guo^{^b}(

), Hong Wang^{^c}(

)

aState Key Laboratory for Mechanical Behavior of Materials, Faculty of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China

bState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Abstract

Keywords: microwave ceramics, dielectric behavior, structural phase transition, order–disorder phenomena, low sintering temperatures

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Acknowledgements

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Publication history

Received: 16 January 2023

Revised: 06 March 2023

Accepted: 23 March 2023

Published: 09 May 2023

Issue date: June 2023

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61631166004 and 51902245). Hong Wang acknowledged the support of Shenzhen Science and Technology Program (Nos. KQTD20180411143514543 and JSGGZD20220822095603006). The XRD, SEM, and Raman tests were done in Instrumental Analysis Center of Xi’an Jiaotong University. The IR spectra experiment was performed by using the U4 beamline station at National Synchrotron Radiation Laboratory. The authors would like to thank Zeming Qi, Chuansheng Hu, and Hengjie Liu (National Synchrotron Radiation Laboratory) for the IR measurements.

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