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Impact of Sm-substitution and microwave sintering on dielectric and mechanical properties of SrBi4Ti4O15 ceramics

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Abstract

In quest of finding an alternative for lead-based materials, ferroelectric materials with Bi-layered structure have attracted great attention due to their potential applications in non-volatile memory, electro-optic devices, and microelectromechanical systems. In this work, samarium (Sm)-substituted SrBi4Ti4O15 (SBTi) ceramics have been prepared by solid-state reaction method and sintered using microwave, as well as conventional heating. XRD phase analysis reveals the formation of single phase compound, and there is no effect of Sm-substitution on basic crystal structure. SEM micrographs showed the plate-like structure of grains both in microwave and conventional furnace. Temperature-dependent dielectric properties were investigated in the temperature range 40–600 °C and frequency range 10 kHz–1 MHz. Sm-substitution increases dielectric constant upto Sm ~ 0.75 and also introduces small relaxor behavior. Hardness and Young’s modulus of SrBi4-xSmxTi4O15 ceramics were measured by nanoindentation. The structural, morphology, dielectric, and mechanical properties of pure and substituted SrBi4Ti4O15 ceramics along with sintering methods have been investigated in detail.

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Acknowledgements

One of the authors, A. Rambabu, gratefully acknowledges the financial support received from ITPAR-II of DST.

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Authors and Affiliations

  1. Department of Basic Sciences and Humanities, Physics Division, GMR Institute of Technology, Rajam, Andhra Pradesh, 532127, India

    A. Rambabu

  2. School of Physics, University of Hyderabad, Hyderabad, Telangana, 500046, India

    K. C. James Raju

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  1. A. Rambabu
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Correspondence to A. Rambabu.

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Rambabu, A., Raju, K.C.J. Impact of Sm-substitution and microwave sintering on dielectric and mechanical properties of SrBi4Ti4O15 ceramics. J Mater Sci: Mater Electron 31, 19698–19712 (2020). https://doi.org/10.1007/s10854-020-04496-z

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