Piezoelectric (Na0.5K0.5)NbO3-SrTiO3 Ceramics in the Tetragonal-Orthorhombic Phase Boundary Studied by Raman Spectroscopy
Piezoelectric (Na0.5K0.5)NbO3-SrTiO3 Ceramics in the Tetragonal-Orthorhombic Phase Boundary Studied by Raman Spectroscopy
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DOI：
10.1080/00150190601187021
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发表时间：
2007-03
期刊：
影响因子：
0.8
通讯作者：
J. Kano;K. Sasanuma;S. Tsukada;S. Kojima;Ruiping Wang;K. Hanada;K. Matsusaki;H. Bando
中科院分区：
文献类型：
--
作者：
J. Kano;K. Sasanuma;S. Tsukada;S. Kojima;Ruiping Wang;K. Hanada;K. Matsusaki;H. Bando
利用拉曼光谱研究了（1-x）（Na0.5K0.5）NbO 3 −xSrTiO 3和（Na 1 − yKy）NbO 3无铅压电陶瓷在x = 0.05的中间相的动力学性质.通过对（1-x）（Na 0.5 K 0.5）NbO 3 −xSrTiO 3和（Na 1 − yKy）NbO 3的室温拉曼光谱的比较，发现在x = 0.0 5时，中间相出现过阻尼模式，并发生软化。虽然由于使用陶瓷样品而难以分配模式，但该结果具有过阻尼模式包括在正交相中观察到的软模式的可能性。
Raman spectroscopy of lead-free piezoelectric (1-x)(Na 0.5 K 0.5 )NbO 3 −xSrTiO 3 ceramics and (Na 1 − y Ky)NbO 3 ones sintered by the Spark-Plasma-Sintering method have been performed to investigate the dynamical property in the intermediate phase of x = 0.05. From the comparison of Raman spectra between (1-x)(Na 0.5 K 0.5 )NbO 3 −xSrTiO 3 and (Na1 − yKy)NbO 3 at room temperature, the overdamped mode which became soften was found in the intermediate phase at x = 0.05. Although it is difficult to assign the mode because of using ceramics samples, this result has a possibility that the overdamped mode includes the soft mode observed in the orthorhombic phase.