Study on Phase Structure and Electrical Properties of La-Doped (K0.5Na0.5)0.94Li0.06NbO3 Ceramics

Yong Liu; Rui Qing Chu; Zhi Jun Xu; Qian Chen; Lin Shao; Kang An; Guo Rong Li

doi:10.4028/www.scientific.net/AMR.328-330.1127

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 328-330Study on Phase Structure and Electrical Properties...

Study on Phase Structure and Electrical Properties of La-Doped (K_0.5Na_0.5)_0.94Li_0.06NbO₃ Ceramics

Abstract:

Lead-free piezoceramics (K_0.5Na_0.5)_0.94-3xLi_0.06La_xNbO₃ were synthesized by the conventional solid-state reaction process. The effect of La-doping on the phase structure and electrical properties of (K_0.5Na_0.5)_0.94Li_0.06NbO₃ ceramics was investigated. X-ray diffraction analysis showed that the crystal structure of the ceramics changed from coexistence of orthorhombic and tetragonal phases to pseudo-cubic phase with the increase of La-doping level, and the change of phase structure seriously weakened the dielectric, ferroelectric and piezoelectric properties of the ceramics. In addition, it was found that the La-doping improved the density of the ceramics and the ceramics became dense. Meanwhile, the ceramics with La-doping displayed a relative lower loss tangent (tanδ) from room temperature to approximately 350°C.

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Advanced Materials Research (Volumes 328-330)

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1127-1130

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.328-330.1127

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Online since:

September 2011

Authors:

Yong Liu, Rui Qing Chu, Zhi Jun Xu, Qian Chen, Lin Shao, Kang An, Guo Rong Li

Keywords:

Electrical Properties, KNN, Phase Structure, Piezoceramic

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