Effect of Doping Ions on Structure and Electrical Properties of Lead-Free KNN Ceramics

Na Yin; Abolfazl Jalalian; Zhi Gang Gai; Lan Ling Zhao; Xiao Lin Wang

doi:10.4028/www.scientific.net/AMR.1058.190

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1058Effect of Doping Ions on Structure and Electrical...

Effect of Doping Ions on Structure and Electrical Properties of Lead-Free KNN Ceramics

Abstract:

Doping effect on the lattice parameters, vibration modes, dielectric and piezoelectric properties of LiSbO₃, LiTaO₃ and LiNbO₃substituted lead-free K_0.5Na_0.5NbO₃ (KNN) ceramics are investigated. All compositions are crystallized in morphotropic phase boundary region. Enhanced piezoelectric and electromechanical response d₃₃ ~176–197 pC/N, k_p ~45%–48%, and k_t ~34%–47% obtained in the doped ceramics are due to the presence of the polymorphic phase transition between orthorhombic and tetragonal phase at room temperature.

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Advanced Materials Research (Volume 1058)

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190-195

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https://doi.org/10.4028/www.scientific.net/AMR.1058.190

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Online since:

November 2014

Authors:

Na Yin*, Abolfazl Jalalian, Zhi Gang Gai, Lan Ling Zhao, Xiao Lin Wang

Keywords:

KNN, Morphotropic Phase Boundary, Piezoelectric Ceramic (PZT)

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