Spark plasma sintering of doped (k-x na1-x)nbo3 piezoceramics

Spark plasma sintering of doped (k-x na1-x)nbo3 piezoceramics

Author Souza, C. A. Autor UNIFESP Google Scholar
Eiras, J. A. Google Scholar
Lente, M. H. Autor UNIFESP Google Scholar
Abstract In this work, pure and doped (K-0.48 Na-0.52)NbO3 ceramics (KNN) were prepared by using Spark Plasma Sintering (SPS) method. In order to investigate the influence of doping elements on the microstructural, structural and dielectric properties of KNN, Cu2+ and Li1+ doping elements were added. The results revealed the viability to produce highly dense pure and doped KNN ceramics with good crystallization in the perovskite phase. Densities around 96% and 99% of the theoretical one were reached. In relation to pure KNN, it was verified that Cu2+ addition reduced significantly the sintering temperature, revealing a better microstructure with a more homogeneous grain size distribution and structure with well-defined splitting of the XRD peaks. In comparison to pure KNN, the addition of both doping elements decreased both the dielectric constant the dielectric losses as well.
Keywords Lead-Free Piezoelectrics
Spark Plasma Sintering
Piezoelectric TransducersFree Piezoelectric Ceramics
Sodium-Potassium Niobate
Lead-Free Piezoceramics
Electrical-Properties
Titanate Ceramics
Phase-Transitions
Temperature
Behavior
Microstructure
Alkaline
Language English
Sponsor FAPESP
CNPq
FINEP
Date 2016
Published in Ferroelectrics. Abingdon, v. 499, n. 1(3 SI), p. 47-56, 2016.
ISSN 0015-0193 (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 47-56
Origin https://doi.org/10.1080/00150193.2016.1171983
Access rights Closed access
Type Article
Web of Science ID WOS:000379245900006
URI http://repositorio.unifesp.br/handle/11600/49460

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