Low-firing and temperature stability regulation of tri-rutile MgTa<sub>2</sub>O<sub>6</sub> microwave dielectric ceramics

Chengzhi Xu; Hongyu Yang; Hongcheng Yang; Linzhuang Xing; Yuan Wang; Zhimin Li; Enzhu Li; Guorui Zhao

doi:10.1007/s12613-023-2791-6

Volume 31 Issue 8

Aug. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(8): 1935-1943

Chengzhi Xu, Hongyu Yang, Hongcheng Yang, Linzhuang Xing, Yuan Wang, Zhimin Li, Enzhu Li, and Guorui Zhao, Low-firing and temperature stability regulation of tri-rutile MgTa₂O₆ microwave dielectric ceramics, Int. J. Miner. Metall. Mater., 31(2024), No. 8, pp. 1935-1943. https://doi.org/10.1007/s12613-023-2791-6

Cite this article as:

Chengzhi Xu, Hongyu Yang, Hongcheng Yang, Linzhuang Xing, Yuan Wang, Zhimin Li, Enzhu Li, and Guorui Zhao, Low-firing and temperature stability regulation of tri-rutile MgTa2O6 microwave dielectric ceramics, Int. J. Miner. Metall. Mater., 31(2024), No. 8, pp. 1935-1943. https://doi.org/10.1007/s12613-023-2791-6

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Research Article

Low-firing and temperature stability regulation of tri-rutile MgTa₂O₆ microwave dielectric ceramics

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Corresponding authors:
Hongyu Yang E-mail: yanghongyu@xidian.edu.cn

Zhimin Li E-mail: zmli@mail.xidian.edu.cn
Received: 10 July 2023; Revised: 16 October 2023; Accepted: 17 November 2023; Available online: 21 November 2023

Abstract

Abstract

A glass frit containing Li₂O–MgO–ZnO–B₂O₃–SiO₂ component was used to explore the low-temperature sintering behaviors and microwave dielectric characteristics of tri-rutile MgTa₂O₆ ceramics in this study. The good low-firing effects are presented due to the high matching relevance between Li₂O–MgO–ZnO–B₂O₃–SiO₂ glass and MgTa₂O₆ ceramics. The pure tri-rutile MgTa₂O₆ structure remains unchanged, and high sintering compactness can also be achieved at 1150°C. We found that the Li₂O–MgO–ZnO–B₂O₃–SiO₂ glass not only greatly improves the low-temperature sintering characteristics of MgTa₂O₆ ceramics but also maintains a high (quality factor (Q) × resonance frequency (f)) value while still improving the temperature stability. Typically, great microwave dielectric characteristics when added with 2wt% Li₂O–MgO–ZnO–B₂O₃–SiO₂ glass can be achieved at 1150°C: dielectric constant, ε_r = 26.1; Q × f = 34267 GHz; temperature coefficient of resonance frequency, τ_f = −8.7 × 10⁻⁶ /°C.
- MgTa₂O₆;
- ceramic;
- microwave dielectric characteristics;
- glass

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