| Autor: |
Hong Qiong Huang, Zhi Yuan Cheng, Xiao Bo Hong, Hai Tao Li, Han Guo, Jin Feng Gong |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Applied Mechanics and Materials. :459-462 |
| ISSN: |
1662-7482 |
| DOI: |
10.4028/www.scientific.net/amm.423-426.459 |
| Popis: |
Alkali niobate lead-free piezoelectric ceramics with nominal compositions [(Na0.52K0.48)0.94+ xLi0.06-x](Nb0.94Sb0.06)O3 ((NK)xLNS) were prepared by normal sintering. Crystalline phase, piezoelectric properties and sintering behavior of (NK)xLNS ceramics were investigated with a special emphasis on the influence of alkli metal content. The x-ray diffraction patterns and the corresponding calculation of lattice parameters indicated that a phase transition from tetragonal to orthorhombic symmetry occurs as x=0.01, resulting in enhanced piezoelectric constant and planar electromechanical coupling coefficient of 266 pC/N and 38.5%, respectively. With x=0.01, the ceramics sintered at 1050 C show higher density and better electrical properties. Our results indicate the importance of sintering temperature and elaborate compositional control for enhancing piezoelectric properties in niobate-based ceramics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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