Li2CO3-B2O3-SiO2-CaO-Al2O3 glass-modified Ba3Ti3.91(Ni1/3Nb2/3)0.09Nb4O21 microwave dielectric ceramics for frequency-controlled beam application

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-10-17 DOI:10.1016/j.jeurceramsoc.2025.117910

Leling Chen , Tingting Tang , Chaoyang Li , Jian Shen

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引用次数: 0

Abstract

Here, Ba₃Ti_3.91(Ni_1/3Nb_2/3)_0.09Nb₄O₂₁ + Li₂CO₃-B₂O₃-SiO₂-CaO-Al₂O₃ (BTN-NN + xwt%LBSCA, x = 0.25–1.25) ceramics are synthesized via the solid-phase method. The LBSCA glass successfully reduces the sintering temperature of the BTN-NN ceramic from 1250°C to below 960°C. The microwave dielectric properties are enhanced to ε_r = 51.9, Q×f =13092 GHz, and τ_f = +18.6 ppm/°C, respectively. The well-matched cofiring properties between the BTN-NN+xwt%LBSCA (x = 1.00) ceramic and Ag pastes are revealed. Based on this ceramic and silver, a frequency-controlled beam device (@5 mm × 5 mm × 1.28 mm) in the X-band is designed. This device can control the intensity and beam direction with frequency as the independent variable, and has a beam scanning space of 4.1° in the frequency range of 10.55–10.80 GHz while maintaining high reflectivity (≥ 0.5). This function is verified by far-field amplitude and phase. This work broadens the scope of application of microwave dielectric ceramics.

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Li2CO3-B2O3-SiO2-CaO-Al2O3玻璃改性Ba3Ti3.91(Ni1/3Nb2/3)0.09Nb4O21微波介质陶瓷的调频波束应用

本文采用固相法合成了Ba3Ti3.91(Ni1/3Nb2/3)0.09Nb4O21 + Li2CO3-B2O3-SiO2-CaO-Al2O3 （BTN-NN + xwt%LBSCA, x = 0.25-1.25）陶瓷。LBSCA玻璃成功地将BTN-NN陶瓷的烧结温度从1250℃降低到960℃以下。微波介电性能提高到εr = 51.9,Q×f =13092 GHz, τf = +18.6 ppm/°C。结果表明，BTN-NN+xwt%LBSCA （x = 1.00）陶瓷与银浆具有良好的共烧性能。基于该陶瓷和银，设计了x波段的频率控制波束器件（@5 mm × 5 mm × 1.28 mm）。该装置可以以频率为自变量控制强度和波束方向，在10.55 ~ 10.80 GHz频率范围内波束扫描空间为4.1°，同时保持高反射率（≥0.5）。用远场振幅和相位验证了该函数。这项工作拓宽了微波介质陶瓷的应用范围。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.