Ultra-low εr and low dielectric loss (Mg1−xMnx)2Al4Si5O18 (x=0.1–0.5) microwave dielectric ceramics for patch antenna and dielectric resonator antenna applications

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.250

Ruihan Wang , Dan Liu , Kexin Xu , Zipei Wang , Haitao Wu , Xu Zhou , Huanrong Tian , Lianwei Shan

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引用次数: 0

Abstract

In this work, Mn²⁺ substitution was employed to modify cordierite-based microwave dielectric ceramics, formulated as (Mg_1−xMn_x)₂Al₄Si₅O₁₈ (x = 0.1–0.5). XRD showed that when x ≤ 0.5, the phases are all low-temperature cordierite phase (β-cordierite). The substitution of Mn²⁺ improved the sintering properties of cordierite and reduced the sintering temperature. When x = 0.2, the ceramics present the best comprehensive microwave dielectric properties sintering at 1350 °C: ε_r ∼4.96, Q × f ∼72,000 GHz, τ_f ∼ −13 ppm/°C. The complex permittivity spectrum of the material was analyzed by far infrared spectroscopy. The ion displacement polarization and low band peak have very high contribution to the complex permittivity. Thz-tds was used to analyze the dielectric properties and response mechanism of Mn-Cordierite ceramics at high frequency band, which have lower dielectric loss at THz frequency band. P-V-L theory correlated the microwave dielectric properties of ceramics with the chemical bond properties. Si-O exhibits extremely high U and E, which makes a very high contribution to the dielectric properties. A patch antenna and dielectric resonator antenna (DRA) based on Mg_1.6Mn_0.4Al₄Si₅O₁₈ were designed. The patch antenna exhibited a low reflection coefficient(S11) of −26.68 dB and a high gain of 7.11dBi at 4.55 GHz. Mn-cordierite-based DRA exhibited a HE_11δ mode at 8.1 GHz. The device had a low S11 value of −13.48 dB and a wide impedance bandwidth of 15.8 %, which meets the application in the field of civil communication.

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超低εr和低介电损耗（Mg1−xMnx）2Al4Si5O18 （x= 0.1-0.5）微波介电陶瓷贴片天线和介电谐振器天线应用

在这项工作中，采用Mn2+取代改性堇青石基微波介电陶瓷，配方为（Mg1−xMnx）2Al4Si5O18 （x = 0.1-0.5）。XRD表明，当x≤0.5时，相均为低温堇青石相（β-堇青石）。Mn2+的加入改善了堇青石的烧结性能，降低了烧结温度。当x = 0.2时，陶瓷在1350℃烧结时表现出最佳的综合微波介电性能：εr ~ 4.96, Q × f ~ 72,000 GHz, τf ~−13 ppm/°C。用远红外光谱分析了材料的复介电常数谱。离子位移极化和低带峰对复介电常数的贡献很大。利用THz -tds分析了mn -堇青石陶瓷在高频段的介电性能和响应机理，发现其在太赫兹频段具有较低的介电损耗。P-V-L理论将陶瓷的微波介电性能与化学键性能联系起来。Si-O表现出极高的U和E，这对介电性能有很大的贡献。设计了基于Mg1.6Mn0.4Al4Si5O18的贴片天线和介电谐振器天线（DRA）。该贴片天线在4.55 GHz时具有−26.68 dB的低反射系数（S11）和7.11dBi的高增益。mn -堇青石基DRA在8.1 GHz波段呈现HE11δ模式。该器件具有- 13.48 dB的低S11值和15.8%的宽阻抗带宽，满足民用通信领域的应用。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.