RT info:eu-repo/semantics/article
T1 Processing Optimization and Toxicological Evaluation of “Lead-Free” Piezoceramics: A KNN-Based Case Study
A1 Iacomini, Antonio .
A1 Tamayo Ramos, Juan Antonio
A1 Rumbo Lorenzo, Carlos
A1 Urgen, Irem
A1 Mureddu, Marzia
A1 Mulas, Gabriele
A1 Enzo, Stefano
A1 Garroni, Sebastiano
K1 Lead-free piezoceramics
K1 Sodium potassium niobate
K1 Processing
K1 Toxicity assays
K1 X-ray diffraction
K1 Mechanochemistry
K1 Química física
K1 Chemistry, Physical and theoretical
AB Due to the ever-increasing limitations of the use of lead-based materials, the manufacturing of lead-free piezoceramics with competitive piezoelectric properties and established nontoxicity is considered a priority for the scientific and industrial community. In this work, a lead-free system based on sodium potassium niobate (KNN), opportunely modified with MgNb2O6 (MN), was prepared through a combination of a mechanochemical activation method and air sintering, and its toxicity was evaluated. The effect of the mechanical processing on the microstructure refinement of the processed powders was established by X-ray diffraction and the average crystallite size content of the Nb2O5 species was evaluated. The experimental evidence was rationalized using a phenomenological model which permitted us to obtain the amount of powder processed at each collision and to optimize the activation step of the pre-calcined reagents. This influenced the final density and piezoresponse of the as-sintered pellets, which showed optimal properties compared with other KNN systems. Their toxicological potential was evaluated through exposure experiments to the pulverized KNN-based pellets, employing two widely used human and environmental cellular models. The in vitro assays proved, under the selected conditions, the absence of cytotoxicity of KNN-bases systems here studied.
PB MDPI
SN 1996-1944
YR 2021
FD 2021-08-03
LK http://hdl.handle.net/10259/9486
UL http://hdl.handle.net/10259/9486
LA eng
NO The scholarship of A.I. was supported within the PhD joint scheme between University of Sassari and Cagliari coded DOT1304455 by MIUR, while the scholarship of M.M. received financial support within the PON-RI Project coded CUP: J84G20000420001, participated also by ABINSULA S.p.A.
DS Repositorio Institucional de la Universidad de Burgos
RD 27-jul-2024