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- Title
Electrical properties of manganese modified sodium potassium lithium niobate lead-free piezoelectric ceramics.
- Authors
Zuo, Ruzhong; Fu, Jian; Su, Shi; Fang, Xusheng; Cao, Jiang-Li
- Abstract
Effects of MnO2 doping on the microstructure, densification, dielectric, ferroelectric and piezoelectric properties of (Na0.5K0.5)0.935Li0.065NbO3 (NKLN) lead-free piezoelectric ceramics were investigated. On the one hand, the addition of a small amount of MnO2 has little effect on the crystalline structure, however, slightly promotes sintering and grain growth, and improves the uniformity of microstructure to a certain degree. On the other hand, MnO2 doped NKLN ceramics show hard properties in piezoelectric activities, possessing decreased room-temperature dielectric constant, loss tangent and piezoelectric constants d 33, and increased mechanical quality factors Q m. The 1.2 mol% MnO2 doped NKLN ceramics have a loss tangent of approximately 1%, a Q m of ∼170 and a d 33 of 150 pC/N. These effects were considered to come from the formation of oxygen vacancies and the multi-valence states of Mn ions.
- Subjects
PIEZOELECTRICITY; CERAMICS; MICROSTRUCTURE; DIELECTRICS; FERROELECTRIC crystals; MATERIALS science
- Publication
Journal of Materials Science: Materials in Electronics, 2009, Vol 20, Issue 3, p212
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-008-9701-6