An Alternative Way To Enhance Piezoelectricity and Temperature Stability in Lead-Free Sodium Niobate Piezoceramics
An Alternative Way To Enhance Piezoelectricity and Temperature Stability in Lead-Free Sodium Niobate Piezoceramics
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增强无铅铌酸钠压电陶瓷的压电和温度稳定性的替代方法
DOI：
10.1021/acs.inorgchem.8b01602
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发表时间：
2018
影响因子：
4.6
通讯作者：
Wu Jiagang
中科院分区：
文献类型：
--
作者：
Lv Xiang;Chen Yanbin;Wu Bo;Zhu Jianguo;Xiao Dingquan;Wu Jiagang
为了进一步平衡压电性和温度稳定性之间的关系，通过构建宽的四方相区，开发了（0.975 -y）NaNbO_3-yBaTiO_3 - 0.025BaZrO_3（y= 0-0.20）陶瓷。研究了BaTiO 3对相结构、电性能和温度依赖性之间关系的影响。随着BaTiO 3含量的增加，陶瓷经历了由正交相到四方相再到弛豫立方相的结构演变。当y = 0.08时，陶瓷的四方相区较宽（24-180 °C），压电系数d_（33）= 215 pC/N。有趣的是，在20-180 °C范围内，在y = 0.08的范围内，观察到单极应变（Suni）和压电系数（d33）的优异温度稳定性。这项工作提供了另一种方法来提高无铅压电陶瓷的压电性和温度稳定性。
To further balance the relationship between piezoelectricity and temperature stability, the (0.975 –y)NaNbO3-yBaTiO3-0.025BaZrO3(y= 0–0.20) ceramics are developed by constructing a wide tetragonal phase region. Effects of BaTiO3on the relationships among phase structure, electrical properties, and temperature dependence are investigated. With increasing BaTiO3contents, the ceramics endure the structural evolutions from orthorhombic phase to tetragonal phase, and then to relaxor cubic phase. A wide tetragonal phase zone of 24–180 °C can be realized in the ceramics withy= 0.08, together with an enhanced piezoelectric coefficientd33= 215 pC/N. Intriguingly, excellent temperature stability of unipolar strain (Suni) and piezoelectric coefficient (d33) are observed in the ceramics withy= 0.08 within 20–180 °C. This work provides an alternative way to enhance piezoelectricity and temperature stability in lead-free piezoceramics.