Effect of binary ion substitution on the crystal structure and microwave dielectric properties of MgTa2O6 ceramics

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-10-25 DOI:10.1111/jace.20232

Yang Gao, Junjie Chen, Weishuang Fang, Haiyi Peng, Tianyi Xie, Haishen Ren, Xiaogang Yao, Huixing Lin

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引用次数: 0

Abstract

Mg_1/3A1_1/3A2_1/3Ta₂O₆ ceramics (where A1 and A2 represent Co, Ni, or Zn) were prepared using the solid-phase reaction route. The results of X-ray diffraction and Raman tests showed that (Co_1/2Ni_1/2)²⁺, (Co_1/ ₂Zn_1/2)²⁺, and (Ni_1/2Zn_1/2)²⁺ ions replaced Mg²⁺ ions in the lattice of MgTa₂O₆, resulting in the formation of a pure tri-rutile structure. All three complex ions could significantly reduce the sintering temperature of the ceramics (by 150°C–200°C) and could broaden the sintering window. The large deviation (48.8%–69.2%) between the porosity corrected relative permittivity ε_r-corr. and the theoretical relative permittivity ε_r-theo. might be due to the overestimation of the ionic polarizability of Ta⁵⁺ by Shannon. (Co_1/2Ni_1/2)²⁺ has the most significant effect of increasing the bond energy of ceramic A–O bonds, reducing the τ_f value from 51 to 36 ppm/°C. In addition, the mechanisms affecting their dielectric properties are discussed based on bond ionicity (f_i), full width at half maximum (FWHM) of Raman peak, and bond energy (E). Mg_1/3Co_1/3Ni_1/3Ta₂O₆ ceramic sintered at 1350°C have the most excellent microwave dielectric properties: ε_r = 26.8, Q × f = 86,000 GHz, and τ_f = 36 ppm/°C.

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.