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oai:riubu.ubu.es:10259/119552026-07-25T00:05:24Zcom_10259_9476com_10259.4_106com_10259_2604col_10259_9477

Processing, microstructure, electrical properties and cytotoxic behaviour of lead-free 0.99K0.5Na0.5NbO3-0.01BiFeO3 piezoceramics prepared using Spark Plasma Sintering (SPS) Iacomini, Antonio . Garroni, Sebastiano Mureddu, Marzia Malfatti, Luca Thakkar, Swapneel Orrù, Roberto Barbarossa, Simone Pakhomova, Ekaterina Cao, Giacomo Tamayo Ramos, Juan Antonio Parra de la Parra, Sandra de la Rumbo Lorenzo, Carlos García, Álvaro Bartolomé, José F. Pardo, Lorena . Potassium sodium niobate High energy ball milling Spark plasma sintering Raman spectroscopy Dielectric Cytotoxic assessment Cerámica industrial-Tratamiento térmico Ceramics-Heat treatment In this work, “lead free” 0.99K0.5Na0.5NbO3-0.01BiFeO3 (KNN–BF) piezoceramics were prepared by a combination of mechanochemical activation, Spark Plasma Sintering and post-annealing treatment. Results show that the annealing treatment causes important microstructural and electrical changes. The SPS sample was characterized by low electrical resistance, while the air annealed samples showed better insulating properties due to a partial compensation of the oxygen vacancy. The best piezoelectric properties were found for the samples annealed at 1000 and 1050 ​°C for 2h due to the optimum grain size and oxygen vacancy compensation achieved. A further enhancement of the dielectric and piezoelectric properties was achieved through a second annealing treatment in oxygen flux at 1050 ​°C for 30 ​min. Moreover, the toxicity of the pellets was evaluated through exposure experiments to the pulverized KNN–BF pellets, employing two widely used human and environmental cellular models. 2026-07-24T08:03:42Z 2026-07-24T08:03:42Z 2022-09 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 0022-4596 https://hdl.handle.net/10259/11955 10.1016/j.jssc.2022.123589 eng Journal of Solid State Chemistry. 2022, V. 316, 123589 https://doi.org/10.1016/j.jssc.2022.123589 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier https://riubu.ubu.es/bitstream/10259/11955/4/Iacomini-jssc_2022.pdf.jpg Hispana TEXT http://creativecommons.org/licenses/by-nc-nd/4.0/ RIUBU. Repositorio Institucional de la Universidad de Burgos https://hdl.handle.net/10259/11955