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Microstructure and dielectric properties of BST/MZO ceramic composites for tunable microwave applications

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Abstract

Ba0.6Sr0.4TiO3/Mg0.9Zn0.1O (BST/MZO) ceramic composites with different MZO contents were prepared by traditional ceramic process. The crystal structure, fracture surface morphology, and dielectric properties were systematically investigated. The results show that the BST/MZO ceramic composites possess diphase structure, dense, and uniform morphology. The composites have relatively low dielectric loss (in the order of 10−3) at microwave frequency. The ceramics all retain substantial tunability (more than 20% at 8 kV/mm DC field) and excellent dielectric strength (more than 19.5 kV/mm). The BST-50 wt% MZO sample has the optimal FOM value (about 256) and should be a better candidate for tunable microwave applications.

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  1. Advanced Electronic Materials Institute, General Research Institute for Nonferrous Metals, Beijing, 100088, People’s Republic of China

    Jiandong Cui, Guixia Dong, Yi Wang & Jun Du

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  1. Jiandong Cui
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  2. Guixia Dong
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  3. Yi Wang
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  4. Jun Du
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Correspondence to Jun Du.

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Cui, J., Dong, G., Wang, Y. et al. Microstructure and dielectric properties of BST/MZO ceramic composites for tunable microwave applications. J Mater Sci: Mater Electron 20, 473–478 (2009). https://doi.org/10.1007/s10854-008-9754-6

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  • DOI: https://doi.org/10.1007/s10854-008-9754-6

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