NDLI: High unipolar strain in samarium-doped potassium

Content Provider	Royal Society of Chemistry (RSC)
Author	Wu, Jiagang Zhu, Jianguo Wang, Xiangjian Tao, Hong Yuan, Yuan Xiao, Dingquan Lv, Xiang Lou, Xiaojie
Copyright Year	2015
Abstract	In this work, a high unipolar strain has been developed in the 0.9675(K0.48Na0.52)(Nb0.915Sb0.035Ta0.05)O3–0.0325(Bi1−xSmx)0.5(Na0.82K0.18)0.5ZrO3 (KNNST-B1−xSxNKZ) ceramics by introducing Sm, and the composition dependence of their phase structures and electrical properties is also discussed. The addition of Sm3+ can change the phase structure of the ceramics by simultaneously shifting TR–O and TO–T to a higher temperature, and we obtained a rhombohedral–orthorhombic–tetragonal coexistence phase (R–O–T) with x = 0, a coexistence phase having orthorhombic and tetragonal (O–T) phases with 0.05 ≤ x ≤ 0.60 and an orthorhombic phase with 0.8 ≤ x ≤ 1.0. In addition, the doping with Sm3+ can greatly enhance the unipolar strain of the ceramics without significantly sacrificing its TC, and a high unipolar strain (∼0.28%) was observed in the ceramics with x = 0.20. More importantly, a large Smax/Emax of ∼833 pm V−1 was also observed in the ceramics with x = 0.20 under a low applied electric field of 1.8 kV cm−1. We believe that such a high unipolar strain can benefit the practical applications of actuators.
Starting Page	39295
Ending Page	39302
Page Count	8
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	5
Issue Number	49
Journal	RSC Advances
DOI	10.1039/c5ra02260f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electric field Tetragonal crystal system Smax Orthorhombic crystal system Dopant Correlation and dependence
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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