掺杂 W6+ 的 CuMoO4 陶瓷具有低介电常数和近零温度系数的谐振频率,适用于超短波无损陶瓷电路(ULTCC)应用

IF 5.8 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Ruihang Li , Luchao Ren , Le Xin , Pengchao Shao , Jia Wang , Zengli Gao , Panpan Lyu , Cuncheng Li , Hui Peng , Mingwei Zhang
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引用次数: 0

摘要

本研究通过 W6+ B 位取代,优化了 CuMoO4 陶瓷谐振频率 (τf) 的温度系数,从 -36 ppm/°C 降至 -8.82 ppm/°C。XRD 分析证实了 CuMo1-xWxO4 陶瓷的单相结构,而 Rietveld 精炼则揭示了晶格参数的扩展。由于烧结密度和离子极化性的变化,W6+ 的替代略微降低了相对介电常数 (εr)。此外,通过分析拉曼峰的半最大全宽(FWHM)和进行堆积分数计算,系统地研究了 W6+ 替代对 Q×f 值的内部影响。此外,晶格畸变和键价分析还阐明了 τf 改善背后的内在机制。因此,当 x = 0.08 时,在 625°C 下烧结的 CuMo1-xWxO4 表现出卓越的整体性能:εr = 5.13,Q×f = 65,506 GHz,τf = -8.82 ppm/°C。此外,该材料与铝电极具有良好的化学兼容性,因此更适合 ULTCC 实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
W6+ doped CuMoO4 ceramics with low dielectric permittivity and near-zero temperature coefficient of resonant frequency for ULTCC application
This study optimizes the temperature coefficient of resonant frequency (τf) in CuMoO4 ceramics from −36 to −8.82 ppm/°C through W6+ B-site substitution. XRD analysis confirms the single-phase structure of CuMo1-xWxO4 ceramics, while Rietveld refinements reveal an expansion in lattice parameters. W6+ substitution slightly reduces the relative permittivity (εr) due to the changes in sintering density and ion polarizability. Moreover, the internal effects of W6+ substitution on the Q×f value are systematically investigated by analyzing the Raman peak's full width at half maximum (FWHM) and conducting packing fraction calculations. Additionally, lattice distortion and bond valence analyses elucidate the intrinsic mechanism behind τf improvement. Consequently, when x = 0.08, CuMo1-xWxO4 sintered at 625°C exhibits superior overall performance: εr = 5.13, Q×f = 65,506 GHz, τf = −8.82 ppm/°C. Furthermore, it demonstrates good chemical compatibility with Al electrodes making the material more suitable for ULTCC practical applications.
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来源期刊
Journal of The European Ceramic Society
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.
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