Enhanced sintering behavior and dielectric performance in ZnZrTa2O8 through dual ions substitution strategy

IF 6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-14 DOI:10.1016/j.ceramint.2026.07.211

Chaomin Yin, Hao Yuan, Yun Zhang, Lan Gao, Liang Shi, Xinghua Zhu, Shihua Ding

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引用次数: 0

Abstract

ZnZr_1-x(Ga_1/2Ta_1/2)_xTa₂O₈ and ZnZr_1-y(Al_1/2Nb_1/2)_yTa₂O₈ were designed in this work. All components retained single monoclinic wolframite structure. (Al_1/2Nb_1/2)⁴⁺ doping decreased the sintering temperature from 1400 °C to 1350 °C with relative density reaching up to 97.53%. Based on Phillips-Van Vechten-Levine (P-V-L) chemical bond theory, the dependence of structure on properties was analyzed. Compared to ionic polarizability, bond ionicity dominated the ε_r variations. ‌Internal loss and external loss exhibited equivalent contributions‌ to Q×ƒ enhancement, from 77,256 GHz at x = 0 to 92,814 GHz at x = 0.04 (95,368 GHz, at y = 0.06). Importantly, (Al_1/2Nb_1/2)⁴⁺ doping enabled the temperature coefficient |τ_ƒ| to meet practical application standard. It was explained from the structural perspective, through calculating oxygen bond valence V_O. Upon sintering at 1400 °C, the ZnZr_0.96(Ga_1/2Ta_1/2)_0.04Ta₂O₈ ceramic demonstrated ε_r = 22.89, Q×f = 92,814 GHz, and τ_f = −34.33 ppm/°C. Similarly, the ZnZr_0.94(Al_1/2Nb_1/2)_0.06Ta₂O₈ ceramic achieved ε_r = 24.07, Q×f = 95,368 GHz, and τ_f = −9.98 ppm/°C at 1350 °C.

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采用双离子取代策略增强ZnZrTa2O8的烧结性能和介电性能

本文设计了ZnZr1-x(Ga1/2Ta1/2)xTa2O8和ZnZr1-y(Al1/2Nb1/2)yTa2O8。所有组分均保持单斜黑钨矿结构。（a1 / 2nb1 /2）4+的掺杂使烧结温度从1400 °C降低到1350 °C，相对密度达到97.53%。基于philips - van Vechten-Levine （P-V-L）化学键理论，分析了结构与性能的依赖关系。与离子极化率相比，键离子性主导εr的变化。‌内部损失和外部损失均表现出同等的贡献‌问×ƒ提高,从77256年在x  GHz = 0到92814 GHz 0.04 x = (95368 GHz, y = 0.06)。重要的是，（a1 / 2nb1 /2）4+的掺杂使温度系数|τ δ |达到了实际应用标准。通过计算氧键价VO，从结构角度对其进行了解释。在烧结在1400 °C, ZnZr0.96 (Ga1/2Ta1/2) 0.04 ta2o8陶瓷展示εr = 22.89,问×f = 92814 GHz,和τf = −34.33 ppm /°C。同样,ZnZr0.94 (Al1/2Nb1/2) 0.06 ta2o8陶瓷实现εr = 24.07,问×f = 95368 GHz,和τf = −9.98 ppm /在1350°C °C。

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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.