Effects of a phase engineering strategy on the strain properties in KNN-based ceramics
Type
ArticleAuthors
Lv, XiangWu, Jiagang

Date
2019-01-11Permanent link to this record
http://hdl.handle.net/10754/678666
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In this work, (0.99 − x)(K0.5Na0.5)(Nb0.965Sb0.035)O3–0.01SrZrO3–x(Bi0.5Na0.5)ZrO3 ceramics were selected to show how a phase engineering strategy (PES) affects the strain properties in potassium sodium niobate (KNN)-based ceramics. The application of PES resulted in the coexistence of multiple phases in KNN-based ceramics accompanied by an increased diffuseness of ferroelectricity and decreased domain size. The strain properties, including the dependencies of strain on composition, temperature and fatigue behavior, were evaluated by considering the phase structure, domain configuration and microstructure. The improved room-temperature strain properties of the KNN-based ceramics with PES originated from the converse piezoelectric response, domain switching and possible electric-induced phase transition, which resulted from the coexistence of multiple phases and complex domain configuration. The enhanced temperature stability mainly originated from the converse piezoelectric response. Endurable fatigue resistance (no degradation within 100–105 electric cycles) and a high electrostriction coefficient (Q33 = 0.035 m4 C−2) were observed in the ceramics with x = 0.03 and 0.05, respectively. This study provides a systematic analysis of the effects of PES on strain properties in KNN-based ceramics.Citation
Lv, X., & Wu, J. (2019). Effects of a phase engineering strategy on the strain properties in KNN-based ceramics. Journal of Materials Chemistry C, 7(7), 2037–2048. doi:10.1039/c8tc06159aSponsors
The authors acknowledge financial support from the National Natural Science Foundation of China (NSFC No. 517222008), the Key Technologies Research and Development Program of Sichuan Province (No. 2018JY0007), and the Graduate Student's Research and Innovation Fund of Sichuan University (No. 2018YJSY009). The authors thank Prof. Jürgen Rödel (Technische Universität Darmstadt) for providing the ferroelectric analyzer (aixACCT TF Analyzer 2000), Mrs Hui Wang (Analytical & Testing Center of Sichuan University) for collecting FE-SEM images, and Dr Junwei Zhang and Prof. Xi-xiang Zhang (King Abdullah University of Science and Technology) for collecting TEM images.Publisher
Royal Society of Chemistry (RSC)Journal
JOURNAL OF MATERIALS CHEMISTRY CAdditional Links
http://xlink.rsc.org/?DOI=C8TC06159Aae974a485f413a2113503eed53cd6c53
10.1039/c8tc06159a