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- W2078139612 abstract "Potassium sodium niobate (KNN) is a well known piezoelectric material and a developing candidate for replacing lead based high performance piezoceramics due to limitations of hazardous materials in electronic devices. Lithium substitution in KNN structure leads a crystal transition from orthorhombic to tetragonal symmetry at room temperature and enhances ferroelectric properties. In this study, lithium substituted KNN piezoceramics with high relative densities were prepared by spark plasma sintering (SPS). Densification, crystal structure, microstructure and ferroelectric behavior of the samples were investigated. It was observed that lithium niobate based secondary phases exist in sintered KNN ceramics. These secondary phases showed significant effects on ferroelectric properties. Maximum (Pm) and remnant (Pr) polarizations were determined as 27 and 20 µC/cm2, respectively for pure KNN at the electric field of 20 kV/cm. When the electric field was increased to 30 kV/cm, Pm did not change significantly, but remained below Pr. For Li substituted samples, Pr decreased with increasing Li content." @default.
- W2078139612 created "2016-06-24" @default.
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- W2078139612 date "2011-01-01" @default.
- W2078139612 modified "2023-09-22" @default.
- W2078139612 title "Microstructure and ferroelectric properties of spark plasma sintered Li substituted K0.5Na0.5NbO3 ceramics" @default.
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- W2078139612 doi "https://doi.org/10.2109/jcersj2.119.355" @default.
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