Upside-down composites: Electroceramics without sintering

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Abstract

In this work, all-ceramic barium strontium titanate (BST) composite is fabricated for the first time at room temperature without sintering, showing a clear phase transformation behavior at Curie temperature and excellent electrical properties. The samples fabricated using pre-treated BST particles with a ceramic binder and selection of the overall particle size showed the relative permittivity up to 200 and loss tangent of 7 × 10 −3 . Although the technology introduced here is demonstrated to feasible for BST, it is generic and usable also for other inorganic materials. Thus, it can expedite and pave the way for versatile applications of other ceramic based composites with, for instance, piezoelectric, ferroelectric, ferromagnetic or ferrite performance used in a large variety of devices for telecommunications, sensors and actuators.

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Nelo, M., Peräntie, J., Siponkoski, T., Juuti, J., & Jantunen, H. (2019). Upside-down composites: Electroceramics without sintering. Applied Materials Today, 15, 83–86. https://doi.org/10.1016/j.apmt.2018.12.021

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