Optimizing microwave dielectric properties of low-temperature sintered Sr/Zn-substituted BaMg2V2O8 by mixing with TiO2

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-07-25 DOI:10.1111/jace.20035

Burhan Ullah, Millicent Appiah, Yuting Xiao, Yixing Yang, Daniel Q. Tan

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引用次数: 0

Abstract

Ba_1 −_xSr_xMg_2 −_yZn_yV₂O₈ compounds, abbreviated as BSMZVO@_xy (x = 0.0–0.2 and y = 0.02), were synthesized with tetragonal structures. The microstructure, molecular structure, and polarization mechanism were investigated using X-ray diffraction, electronic microscopy, Raman spectroscopy, and vector network analyzer. The sintering temperatures (<900°C) and microwave dielectric properties of BSMZVO are significantly impacted by (Sr/Zn)²⁺ substitution and TiO₂ mixing. The BSMZVO@_xy (x = 0.15 and y = 0.02) exhibited encouraging ε_r (12.4–12.7), Q × f (40 054–40 973 GHz), and temperature coefficient of resonance frequency (τ_f ∼ −5.2 to 0.0 ppm/°C) after sintering at 860°C/4 h and 800°C/4 h. For the first time, TiO₂ was added to enhance the density and Q × f value without degrading τ_f. The 0.25 wt.% TiO₂ resulted in optimum ε_r of 13.4, Q × f of 43 636 GHz, and τ_f of +1.8 ppm/°C after sintering at 760°C/4 h. The improved quality factor (Q × f) is linked to the Raman A_1g mode and relative density.

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通过与 TiO2 混合优化低温烧结 Sr/Zn 取代 BaMg2V2O8 的微波介电性能

研究人员合成了具有四方结构的 Ba1 - xSrxMg2 - yZnyV2O8 化合物，简称为 BSMZVO@xy（x = 0.0-0.2 和 y = 0.02）。利用 X 射线衍射、电子显微镜、拉曼光谱和矢量网络分析仪对其微观结构、分子结构和极化机理进行了研究。(Sr/Zn)2+的取代和TiO2的混合对BSMZVO的烧结温度（900°C）和微波介电性能有显著影响。在 860°C/4 h 和 800°C/4 h 烧结后，BSMZVO@xy（x = 0.15 和 y = 0.02）的εr（12.4-12.7）、Q × f（40 054-40 973 GHz）和共振频率温度系数（τf ∼ -5.2 to 0.0 ppm/°C）均有所提高。在 760°C/4 h 烧结后，0.25 wt.% TiO2 产生的最佳εr 为 13.4，Q × f 为 43 636 GHz，τf 为 +1.8 ppm/°C。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.

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