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Morphology control and large piezoresponse of hydrothermally synthesized lead-free piezoelectric (Bi0.5Na0.5)TiO3 nanofibres

机译:水热合成无铅压电(Bi 0.5 Na 0.5 )TiO 3 纳米纤维的形貌控制和大压电响应

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摘要

Lead-free piezoelectric bismuth sodium titanate (BNT) nanostructures were synthesised using a low-temperature hydrothermal technique. It is found that the phase and morphology of the products are strongly dependent on the composition and concentration of the precursors, as well as the processing conditions. Through optimising the synthesis parameters, well-crystallized BNT nanofibers with 150–200 nm diameters and ~5 μm length were obtained. The BNT fibres show a pure perovskite phase with (011) orientation along the length direction. A piezoelectric constant of d33 = ~15 pm V?1 in the diameter direction was observed for these BNT nanofibers.
机译:利用低温水热技术合成了无铅压电钛酸铋钠(BNT)纳米结构。发现产物的相和形态强烈取决于前体的组成和浓度以及加工条件。通过优化合成参数,获得了结晶良好的BNT纳米纤维,其直径为150-200 nm,长度约为5μm。 BNT纤维显示出沿长度方向具有(011)取向的纯钙钛矿相。压电常数 d 33 =〜15 pm V ?1 这些BNT纳米纤维的直径方向被观察到。

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