Novel low temperature co-fired strontium aluminoborate ceramic with low permittivity for microwave applications

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

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.504

Haiquan Wang , Wenjie Zhang , You Wu , Xiaobin Liu , Fangyi Huang , Huanfu Zhou

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引用次数: 0

Abstract

A novel MWDC composed of SrAl₂B₂O₇-base (SAB) with low permittivity was synthesised in this research. The sintering behaviour, microstructures, and dielectric properties of SAB ceramics were studied. SAB sintered at 890 °C showed excellent performance with Quality factor (Q×f) of 27400 GHz, relative permittivity (ε_r) of 4.4, and temperature coefficient of resonant frequency (τ_f) of 29.7 ppm/°C. The potential of SAB as a sintering additive for LCSS ceramics was investigated due to its low ε_r and low sintering temperature. The results show that a moderate amount of SAB helps to improve the densification of LCSS and hence the Q×f value. Excellent performance is obtained at 900 °C for Li₄CaSr(SiO₄)₂ (LCSS) added with 2 wt% SAB: ε_r = 7.5, Q×f = 59614 GHz, τ_f = −75.8 ppm/°C. Moreover, the analyses demonstrated that SAB and LCSS + 2 wt% SAB ceramics exhibit high compatibility with Ag, suggesting their potential suitability for application in LTCC.

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微波低温共烧低介电常数锶铝酸盐陶瓷

本文合成了一种新型的低介电常数SrAl2B2O7-base (SAB) MWDC。研究了SAB陶瓷的烧结性能、显微结构和介电性能。890℃烧结的SAB具有优良的性能，质量因子（Q×f）为27400 GHz，相对介电常数（εr）为4.4，谐振频率温度系数（τf）为29.7 ppm/℃。由于SAB具有较低的εr和较低的烧结温度，因此研究了SAB作为LCSS陶瓷烧结添加剂的潜力。结果表明，适量的SAB有助于提高LCSS的致密性，从而提高Q×f值。在900℃时，添加2wt % SAB的Li4CaSr(SiO4)2 （LCSS）的εr = 7.5, Q×f = 59614 GHz, τf = - 75.8 ppm/℃，得到了优异的性能。此外，分析表明，SAB和LCSS + 2 wt% SAB陶瓷与Ag具有较高的相容性，表明它们在LTCC中具有潜在的适用性。

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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.