Microstructure and dielectric properties of low-temperature sintered MgO-based ceramics at millimeter wave and terahertz frequencies

IF 2.1 3区物理与天体物理 Q3 PHYSICS, APPLIED

Journal of Advanced Dielectrics Pub Date : 2024-02-28 DOI:10.1142/s2010135x23500339

Haotian Liu, Zheng Liang, Chang Liu, Cheng Liu, Huaiwu Zhang

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引用次数: 0

Abstract

Low-temperature co-fired ceramics (LTCC) applied in millimeter/microwave and terahertz frequencies (5G/6G) have attracted a lot of attention recently. In this study, MgO-based dielectric ceramics were successfully sintered at 950∘C with the sintering aids: x wt.% of LiF fluoride ([Formula: see text], 4, 6, 8, 10) and 0.5[Formula: see text]wt.% of BBSZ (Bi2O3–B2O3–SiO2–ZnO) glass. BBSZ glass was introduced as another sintering aid to facilitate the sintering and densification. Crystalline structure and micro-morphology were investigated and analyzed. Dielectric properties ([Formula: see text], [Formula: see text], [Formula: see text]) at millimeter/microwave and terahertz wave frequencies were also studied. The ionic characteristics of Mg–O bond ([Formula: see text]), the lattice energy (U) and the bond energy (E) were calculated and analyzed. It is suggested that the optimal [Formula: see text], where [Formula: see text], [Formula: see text][Formula: see text]GHz (@12[Formula: see text]GHz) and [Formula: see text][Formula: see text]ppm/∘C at millimeter/microwave range. When the frequency was up to terahertz (1.0[Formula: see text]THz), the [Formula: see text] values were 8.8–9.35 and the tan[Formula: see text] were [Formula: see text]–[Formula: see text]. The experimental results indicated that the low-temperature sintered MgO-based ceramics have potential for millimeter/microwave and terahertz communication applications.

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毫米波和太赫兹频率下低温烧结氧化镁基陶瓷的微观结构和介电特性

应用于毫米波/微波和太赫兹频率（5G/6G）的低温共烧陶瓷（LTCC）最近引起了广泛关注。本研究成功地在 950∘C温度下烧结了氧化镁基介电陶瓷，烧结助剂包括：x 重量百分比的氟化锂（[配方：见正文]，4、6、8、10）和 0.5 [配方：见正文]重量百分比的 BBSZ（Bi2O3-B2O3-SiO2-ZnO）玻璃。引入 BBSZ 玻璃作为另一种烧结助剂，以促进烧结和致密化。对晶体结构和微观形态进行了研究和分析。还研究了毫米波/微波和太赫兹波频率下的介电性能（[式：见正文]、[式：见正文]、[式：见正文]）。计算并分析了 Mg-O 键的离子特性（[式：见正文]）、晶格能（U）和键能（E）。结果表明，在毫米波/微波范围内，最佳[式：见正文]、[式：见正文][式：见正文]GHz（@12[式：见正文]GHz）和[式：见正文][式：见正文]ppm/∘C。当频率达到太赫兹（1.0[式：见正文]THz）时，[式：见正文]值为 8.8-9.35，tan[式：见正文]为[式：见正文]-[式：见正文]。实验结果表明，低温烧结氧化镁基陶瓷具有毫米波/微波和太赫兹通信应用的潜力。

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来源期刊

Journal of Advanced Dielectrics PHYSICS, APPLIED-

CiteScore

3.80

自引率

6.50%

发文量

审稿时长

18 weeks

期刊介绍： The Journal of Advanced Dielectrics is an international peer-reviewed journal for original contributions on the understanding and applications of dielectrics in modern electronic devices and systems. The journal seeks to provide an interdisciplinary forum for the rapid communication of novel research of high quality in, but not limited to, the following topics: Fundamentals of dielectrics (ab initio or first-principles calculations, density functional theory, phenomenological approaches). Polarization and related phenomena (spontaneous polarization, domain structure, polarization reversal). Dielectric relaxation (universal relaxation law, relaxor ferroelectrics, giant permittivity, flexoelectric effect). Ferroelectric materials and devices (single crystals and ceramics). Thin/thick films and devices (ferroelectric memory devices, capacitors). Piezoelectric materials and applications (lead-based piezo-ceramics and crystals, lead-free piezoelectrics). Pyroelectric materials and devices Multiferroics (single phase multiferroics, composite ferromagnetic ferroelectric materials). Electrooptic and photonic materials. Energy harvesting and storage materials (polymer, composite, super-capacitor). Phase transitions and structural characterizations. Microwave and milimeterwave dielectrics. Nanostructure, size effects and characterizations. Engineering dielectrics for high voltage applications (insulation, electrical breakdown). Modeling (microstructure evolution and microstructure-property relationships, multiscale modeling of dielectrics).

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