Low-temperature sintering and microwave dielectric properties of Ca2+ substituted Ba0.8-xCaxSr0.2CuSi2O6 ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-06-01 DOI:10.1016/j.ceramint.2025.02.239

Xi Wang , Fangyi Huang , Jiaqing Du , Hua Su , Yuanxun Li , Mingshan Qu , Xiaoli Tang

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引用次数: 0

Abstract

For matching formulation of Ba_0.8−xCa_xSr_0.2CuSi₂O₆ (BSCS-Ca_x) (x = 0–0.1) ceramics with low-temperature co-fired ceramic materials, in this study, BSCS-Ca_x ceramics were synthesized by a solid-state reaction method, Further, the sintering temperature was reduced to 925 °C by adding a small amount of LBSCA glass (0.4 wt%) and BSCS-Ca_x+0.4 wt% LBSCA (BSCS-Ca_x-L) ceramics were obtained. X-ray diffraction analysis revealed that the BSCS-Ca_x-L ceramics consisted of three phases. The incorporation of Ca²⁺ ions did not introduce any new phases. Scanning electron microscopy images showed that the doping of Ca²⁺ promoted the grain growth of BSCS-Ca_x-L ceramics. Raman spectra were used to investigate the lattice vibrations and crystal structure properties. Energy-dispersive spectroscopy point scans of ceramic samples co-fired with Ag showed that the BSCS-Ca_x-L ceramics did not react with Ag, and thus ceramics were chemically compatible with Ag. The best microwave dielectric properties of BSCS-Ca_x-L ceramics, including ε_r = 7.84, Q × f = 42,500 GHz, and τ_f = −16 ppm⋅°C⁻¹, were obtained at an optimized value of x = 0.02.

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Ca2+取代Ba0.8-xCaxSr0.2CuSi2O6陶瓷的低温烧结及微波介电性能

为了匹配Ba0.8−xCaxSr0.2CuSi2O6 (BSCS-Cax) （x = 0-0.1）陶瓷与低温共烧陶瓷材料的配方，本研究采用固相反应法合成了BSCS-Cax陶瓷，并通过添加少量LBSCA玻璃（0.4 wt%）和BSCS-Cax+0.4 wt% LBSCA （BSCS-Cax- l）陶瓷，将烧结温度降至925℃。x射线衍射分析表明，BSCS-Cax-L陶瓷由三个相组成。Ca2+离子的掺入没有引入任何新的相。扫描电镜显示，Ca2+的掺杂促进了BSCS-Cax-L陶瓷的晶粒生长。利用拉曼光谱研究了晶格振动和晶体结构特性。与Ag共烧陶瓷样品的能谱点扫描表明，BSCS-Cax-L陶瓷不与Ag发生反应，因此陶瓷与Ag具有化学相容性。当x = 0.02时，BSCS-Cax-L陶瓷的最佳微波介电性能为εr = 7.84, Q × f = 42,500 GHz, τf =−16 ppm⋅°C−1。

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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.