Effects of La Doping on Microstructure and Ferroelectric Properties of BLTN Lead-Free Ceramics

Na Na Shao; Xi Yun He; Da Zhi Sun; Bin Xia; Xia Zeng; Wen Xiu Cheng; Ping Sun Qiu; Yu Bai Pan

doi:10.4028/www.scientific.net/MSF.898.1591

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HomeMaterials Science ForumMaterials Science Forum Vol. 898Effects of La Doping on Microstructure and...

Effects of La Doping on Microstructure and Ferroelectric Properties of BLTN Lead-Free Ceramics

Abstract:

Lead-free EO ceramics have been received increasing attentions from the view point of green environment in recent years. In this study, lead-free Ba_6-1.5_xLa_xTi₂Nb₈O₃₀ (0≤x≤7%) ceramics were synthesized by the conventional solid state reaction sintering method. The effects of lanthanum doping on the microstructure and electrical properties of Ba₆Ti₂Nb₈O₃₀ (BTN) ceramics were investigated and analyzed. The XRD results revealed that the lanthanum doping changed the BTN lattice parameters slightly. The sample grain size, dielectric constants (1kHz) and the temperature Tm gradually decreased with the increasing of lanthanum doped content. The optimized BLTN ceramic sample with x=4 mol % exhibited a good transparency and excellent electrical properties (Ps=6.41 μC/cm², Pr=0.77 μC/cm², and Ec=3.80 kV/cm).

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Materials Science Forum (Volume 898)

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1591-1596

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https://doi.org/10.4028/www.scientific.net/MSF.898.1591

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Online since:

June 2017

Authors:

Na Na Shao*, Xi Yun He, Da Zhi Sun, Bin Xia, Xia Zeng, Wen Xiu Cheng, Ping Sun Qiu, Yu Bai Pan

Keywords:

BLTN, Dielectric Constant, Ferroelectric Properties, Lead-Free

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