Abstract
50Ba0.5Sr0.5TiO3–(50 − x)Li2Mg3TiO6–xMg2TiO4 ternary ferroelectric-dielectric composite ceramics were prepared by the conventional solid-phase reaction method. The effect of Mg2TiO4 content on the structural characteristics and dielectric tunable properties of composite ceramics were researched. X-ray diffraction (XRD) analysis showed that Ba0.5Sr0.5TiO3, Li2Mg3TiO6 and Mg2TiO4 phases existed in the composite ceramics. The composite ceramics exhibit a broadened dielectric permittivity plateau region. Increasing the content of Mg2TiO4 led to an increase in dielectric permittivity and tunability of 50Ba0.5Sr0.5TiO3–(50 − x)Li2Mg3TiO6–xMg2TiO4 composite: the content of Mg2TiO4 increased from 5 to 40 wt%, the dielectric permittivity increased from 183 to 329, and the tunability under 3 kV/mm increased from 7 to 17.6%. The dielectric properties of Ba0.5Sr0.5TiO3–Li2Mg3TiO6–Mg2TiO4 are comparable to those of the corresponding Ba0.5Sr0.5TiO3–Mg2TiO4 system, and the sintering temperature was reduced by 140 °C. The Ba0.5Sr0.5TiO3–Li2Mg3TiO6–Mg2TiO4 system composite ceramics are promising candidate materials for tunable microwave applications.
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This work was supported by the Natural Science Foundation of China under grant numbers 61671214 and 61401152. The authors wish to acknowledge the Analytical and Testing Center in Huazhong University of Science and Technology for XRD and ESEM analysis.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by NS, ZX, ZF, and CL. The first draft of the manuscript was written by YX and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Song, N., Xu, Z., Fu, Z. et al. Dielectric tunable properties of Ba0.5Sr0.5TiO3–Li2Mg3TiO6–Mg2TiO4 composite ceramics. J Mater Sci: Mater Electron 35, 256 (2024). https://doi.org/10.1007/s10854-024-12002-y
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DOI: https://doi.org/10.1007/s10854-024-12002-y