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

IF 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-02-28 DOI:10.1142/s2010135x23500339

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

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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

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.