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首页> 外文期刊>Physica, B. Condensed Matter >Properties of non-stoichiometric 0.935(K _(0.5+x)Na _(0.5+x))NbO _3-0.065LiSbO _3 lead-free piezoelectric ceramics
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Properties of non-stoichiometric 0.935(K _(0.5+x)Na _(0.5+x))NbO _3-0.065LiSbO _3 lead-free piezoelectric ceramics

机译：非化学计量0.935（K _（0.5 + x）Na _（0.5 + x））NbO _3-0.065LiSbO _3无铅压电陶瓷的性能

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摘要

0.935(K _(0.5x)Na _(0.5x))NbO _30.065LiSbO _3 lead-free piezoelectric ceramics were prepared by normal sintering, and their piezoelectric and dielectric properties were investigated by varying the compensating amount x of alkaline elements (Na and K) addition. It was found that the crystal structure changed from tetragonal to orthorhombic with increasing x from -0.010 to 0.010. An MPB was tailored by optimizing the alkaline elements contents. Enhanced electrical and electromechanical responses of d _(33)=253 pC/N, k _p=0.47, k _t=0.45 and tanδ=0.027 were obtained in the ceramics with x=0.005. These excellent piezoelectric and electromechanical properties indicate that this system may be an attractive lead-free material for a wide range of electro-mechanical transducer applications.
机译：通过正常烧结制备0.935（K _（0.5x）Na _（0.5x））NbO _30.065LiSbO _3无铅压电陶瓷，并通过改变碱性元素（Na）的补偿量x来研究其压电和介电性能。和K）加法。发现随着x从-0.010增加到0.010，晶体结构从四方变为正交。通过优化碱性元素的含量来定制MPB。在x = 0.005的陶瓷中，获得了增强的电气和机电响应，d_（33）= 253 pC / N，k_p = 0.47，k_t = 0.45，tanδ= 0.027。这些出色的压电和机电性能表明，该系统可能是广泛的机电换能器应用中有吸引力的无铅材料。

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