2026-07-29T10:38:30Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/119552026-07-25T00:05:24Zcom_10259_9476com_10259.4_106com_10259_2604col_10259_9477
Repositorio Institucional de la Universidad de Burgos
author
Iacomini, Antonio .
author
Garroni, Sebastiano
author
Mureddu, Marzia
author
Malfatti, Luca
author
Thakkar, Swapneel
author
Orrù, Roberto
author
Barbarossa, Simone
author
Pakhomova, Ekaterina
author
Cao, Giacomo
author
Tamayo Ramos, Juan Antonio
author
Parra de la Parra, Sandra de la
author
Rumbo Lorenzo, Carlos
author
García, Álvaro
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Bartolomé, José F.
author
Pardo, Lorena .
2026-07-24T08:03:42Z
2026-07-24T08:03:42Z
2022-09
0022-4596
https://hdl.handle.net/10259/11955
10.1016/j.jssc.2022.123589
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.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Potassium sodium niobate
High energy ball milling
Spark plasma sintering
Raman spectroscopy
Dielectric
Cytotoxic assessment
Processing, microstructure, electrical properties and cytotoxic behaviour of lead-free 0.99K0.5Na0.5NbO3-0.01BiFeO3 piezoceramics prepared using Spark Plasma Sintering (SPS)
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/11955/1/Iacomini-jssc_2022.pdf
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Iacomini-jssc_2022.pdf