材料科学
铁电性
压电
放电等离子烧结
铁电陶瓷
陶瓷
纳米晶材料
机械合成
反铁电性
纳米尺度
电介质
压电响应力显微镜
复合材料
极化(电化学)
多铁性
纳米技术
光电子学
球磨机
化学
物理化学
作者
Lumen Chao,Yanbing Hou,Mupeng Zheng,Yunge Yue,Ming‐Qiang Zhu
摘要
NaNbO3 sits at an instability between its ferroelectric and antiferroelectric phases, but its nanoscale polarization behavior is rarely reported. In this work, we produced high-density NaNbO3 nanostructured ceramics with a grain size of 50 nm by spark plasma sintering of nanocrystalline powder, which was obtained by mechanosynthesis. The nanostructured ceramics exhibited a symmetrical ferroelectric loop and increased relative permittivity. We believe that the increased internal stress at the nanoscale stabilized the ferroelectric domain structure, which promoted macroscopic piezoelectricity, demonstrating its potential uses in nanoelectromechanical systems.
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