Hydrothermal synthesis and piezoelectric property of Ta-doping K0.5Na0.5NbO3 lead-free piezoelectric ceramic

Hydrothermal synthesis and piezoelectric property of Ta-doping K0.5Na0.5NbO3 lead-free piezoelectric ceramic
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Ta掺杂K0.5Na0.5NbO3无铅压电陶瓷的水热合成及压电性能

DOI:
10.1016/j.ceramint.2009.05.018
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发表时间:
2009-12
影响因子:
5.2
通讯作者:
Zhou, Yuan
Zhou, Yuan
中科院分区:
材料科学1区
文献类型:
--
作者:
Guo, Min;Zhang, Ci;Zhang, Mei;Zhou, Yuan

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采用水热法合成了Ta掺杂的K0.5Na0.5Nb1− xTaxO 3(x=0.1,0.2,0.3,0.4)粉体,并对其进行烧结和极化处理,制备了陶瓷。K0.5Na0.5Nb0.7Ta0.3O3陶瓷靠近准同型相界(MPB),具有最佳的压电性能(d33= 210 pC/N)和良好的机电耦合系数(Kp=0.3)。TEM图像观察到了畴结构,表明K0.5Na0.5Nb0.7Ta0.3O3陶瓷由于靠近MPB而具有良好的压电和铁电性能。
Ta-doping K0.5Na0.5Nb1−xTaxO3(x=0.1, 0.2, 0.3, 0.4) powder was synthesized by hydrothermal approach and its ceramics were prepared after sintering and polarizing treatment in this work. The K0.5Na0.5Nb0.7Ta0.3O3ceramics near morphotropic phase boundary (MPB), which exhibited optimum piezoelectric properties of d33=210pC/N and good electromechanical coupling factors of Kp=0.3. The domain structure has been observed from TEM images which indicates that the K0.5Na0.5Nb0.7Ta0.3O3ceramics have good piezoelectric and ferroelectric properties for it is near the MPB.
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