Print Email Facebook Twitter Deterioration of the piezoelectric properties of (Bi0.5Na0.5)TiO3 when using Na2CO3 as a sintering aid Title Deterioration of the piezoelectric properties of (Bi0.5Na0.5)TiO3 when using Na2CO3 as a sintering aid: A crystallographic and microstructural study Author Mahon, T.R. (TU Delft Novel Aerospace Materials) Giannopoulos, D. (TU Delft Novel Aerospace Materials) van der Zwaag, S. (TU Delft Novel Aerospace Materials) Groen, W.A. (TU Delft Aerospace Structures & Materials; TU Delft Novel Aerospace Materials) Department Aerospace Structures & Materials Date 2021 Abstract In this work, we present the impact of using Na2CO3 as a sintering aid and grain growth agent on the crystal structure, microstructure, and piezoelectric properties of (Bi0.5Na0.5)TiO3 ceramics. The addition of Na2CO3 leads to a substantial increase in the grain size and density even at a reduced sintering temperature of 1025 °C. However, at the same time, the value of the piezoelectric constant d33 drops dramatically. Using high-resolution x-ray diffraction analysis, we demonstrate that the decrease in piezoelectric constant is due to a change in the chemical composition of the (Bi0.5Na0.5)TiO3 base material rather than due to the change in the grain size. High Na2CO3-addition levels lead to the formation of Bi2O3 as a secondary phase during sintering too. To reference this document use: http://resolver.tudelft.nl/uuid:4896b0f8-d50c-40fa-920e-2613e2d64a17 DOI https://doi.org/10.1063/5.0044636 Embargo date 2021-10-01 ISSN 0021-8979 Source Journal of Applied Physics, 129 (13) Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 T.R. Mahon, D. Giannopoulos, S. van der Zwaag, W.A. Groen Files PDF 5.0044636_1.pdf 3.81 MB Close viewer /islandora/object/uuid:4896b0f8-d50c-40fa-920e-2613e2d64a17/datastream/OBJ/view