Abstract
High dielectric constant microwave ceramics are essential for ceramic-based devices, such as the dielectric resonator used in miniaturized mobile phone components. Herein, perovskite-type (Na1−xLix)0.5Nd0.5TiO3 (0 ≤ x ≤ 1) ceramics were fabricated using the traditional solid-state processing to explore the changing mechanism of dielectric properties and obtain a component with favorable microwave dielectric properties. The results showed that the maximum εr value (140.3) of samples achieved at x = 0.4 due to changes in bond valence at the B-site, while Q×f and τf values decreased with increasing x value. Raman spectra demonstrated that the broader Raman scattering peaks corresponded to shorter microwave energy propagation decay times, which resulted in a decline of Q×f value. The (Na0.3Li0.7)0.5Nd0.5TiO3 sample showed promising microwave dielectric properties (ɛr = 127.3, Q×f = 2,471 GHz, and τf = − 47.3 ppm/°C). Finally, it was determined that a temperature-stable ceramic with a high εr value could be produced when the x value fell within the range of 0.7 to 0.8.
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Funding
This work is supported by the Key Research and Development Program of Sichuan Province (Grant No. 2022YFG0226) and the Scientific Research Foundation of CUIT (Grant No. KYTZ202179).
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All authors contributed to the study conception and design. JM and YX: Material preparation, data collection and analysis were performed. JM: The first draft of the manuscript was written and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Ma, J., Xiong, Y., Zhang, X. et al. Studies of phase transitions, Raman spectra and microwave dielectric properties of perovskite-structured (Na1−xLix)0.5Nd0.5TiO3 ceramics. J Mater Sci: Mater Electron 34, 1039 (2023). https://doi.org/10.1007/s10854-023-10472-0
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DOI: https://doi.org/10.1007/s10854-023-10472-0