Effect of Mn2+ substitution on the dielectric properties of NaMg(PO3)3 ceramics at microwave and terahertz frequencies

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-09-12 DOI:10.1016/j.ceramint.2024.09.144

Qin Yu, Cheng Liu, Junxiao Liu, Da Huang, Tianlong Wen, Dainan Zhang, Huaiwu Zhang

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Abstract

In this study, NaMg_1-xMn_x(PO₃)₃ (0.00 ≤ x ≤ 0.0625) ceramics with low dielectric constant were prepared via the solid-state reaction method. The effects of Mn²⁺ substitution on the microstructure and dielectric properties (at microwave and terahertz frequencies) of the NaMg(PO₃)₃ ceramics were studied by means of the Rietveld refinement, morphology, and ionic polarizability analysis. It is obtained that the NaMg_0.0975Mn_0.025(PO₃)₃ ceramic sintered at 880 °C for 4 hours exhibited optimal dielectric properties at microwave frequencies, where ε_r = 4.585, Q×f = 48,313 GHz (@17.228 GHz), and τ_f = -40.83 ppm/°C. The Q×f and τ_f values were changed by 74.2% and 27.8%, as compared to the values of 27,728 GHz and -56.52 ppm/°C for the pure NaMg(PO₃)₃ ceramic, respectively. For terahertz frequencies (0.2 ∼ 1.0 THz), the ε_r values were decreased to 3.79 ∼ 3.98, and the tanδ values were between 0.0203 and 0.1152. All the experimental results indicate that this system exhibits great potentials both at microwave and terahertz frequencies.

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Mn2+ 取代对微波和太赫兹频率下 NaMg(PO3)3 陶瓷介电性能的影响

本研究通过固态反应法制备了低介电常数的 NaMg1-xMnx(PO3)3 (0.00 ≤ x ≤ 0.0625) 陶瓷。通过里特维尔德细化、形貌和离子极化率分析，研究了 Mn2+ 取代对 NaMg(PO3)3 陶瓷微观结构和介电性能（微波和太赫兹频率）的影响。结果表明，在 880 °C 下烧结 4 小时的 NaMg0.0975Mn0.025(PO3)3 陶瓷在微波频率下具有最佳介电性能，其中 εr = 4.585，Q×f = 48,313 GHz (@17.228 GHz)，τf = -40.83 ppm/°C。与纯 NaMg(PO3)3 陶瓷的 27,728 GHz 和 -56.52 ppm/°C 值相比，Q×f 和 τf 值分别变化了 74.2% 和 27.8%。在太赫兹频率（0.2 ∼ 1.0 太赫兹）下，εr 值降至 3.79 ∼ 3.98，tanδ 值介于 0.0203 和 0.1152 之间。所有实验结果都表明，该系统在微波和太赫兹频率下都表现出巨大的潜力。

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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.