caa a22 4500 445826681 CHVBK 20180317145301.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10854-011-0300-6 doi (NATIONALLICENCE)springer-10.1007/s10854-011-0300-6 Microstructure and electrical properties of (Na1.015−xKx)NbO3 lead-free piezoceramics [Elektronische Daten] [Guo-Zhong Zang, Xiu-Jie Yi, Juan Du, Zhi-Jun Xu, Rui-Qing Chu, Peng Fu, Wei Li] In order to obtain the morphotropic phase boundary (MPB) and good piezoelectric properties, lead-free (Na1.015−xKx)NbO3 (x=0.32-0.35) piezoceramics were synthesized by conventional solid state sintering. The x-ray diffraction results show that the lattice parameters of the monoclinic primitive cell peak at x=0.34. The scanning electron microscopy and energy dispersive spectroscopy reveal that the excess sodium may be an important reason for the abnormal growth of the grains larger than 20μm. All the samples exhibit double-like hysteresis loops and it may also be attributed to the excess Na+. Although the salient microstructure was found in the studied range, the piezoelectric and ferroelectric properties changed slightly with increasing x from 0.32 to 0.35. The values of piezoelectric coefficient d 33 obtained in this study are as high as about 75 pC/N which is close to that of normally prepared (Na0.5K0.5)NbO3 ceramics with MPB structure. Springer Science+Business Media, LLC, 2011 Zang Guo-Zhong School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Yi Xiu-Jie School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Du Juan School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Xu Zhi-Jun School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Chu Rui-Qing School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Fu Peng School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Li Wei School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/9(2011-09-01), 1282-1285 0957-4522 22:9<1282 2011 22 10854 https://doi.org/10.1007/s10854-011-0300-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10854-011-0300-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zang Guo-Zhong School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 700 1- Yi Xiu-Jie School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 700 1- Du Juan School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 700 1- Xu Zhi-Jun School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 700 1- Chu Rui-Qing School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 700 1- Fu Peng School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 700 1- Li Wei School of Materials Science and Engineering, Liaocheng University, 252059, Liaocheng, People's Republic of China aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/9(2011-09-01), 1282-1285 0957-4522 22:9<1282 2011 22 10854 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer