Abstract
In this manuscript, we report the polymorphic phase transitions, structural changes and piezoelectric properties of alkali niobate based lead-free ceramics. The phase transitions were characterized as a function of alkali niobate content at room temperature. The results clearly demonstrate that in this system high piezoelectric properties are achieved for a specific fraction of ferroelectric orthorhombic (O) and tetragonal (T) phases. Using Rietveld and powder diffraction analysis, a correlation was established among the piezoelectric response, the fraction of O and T phases, and KNN ratio for three different systems of (K,Na)NbO3-BaTiO3 (KNN-BT), KNN-LiNbO3 (LN), and (K,Na,Li)NbO3 (KNLN)-BT.
Original language | English (US) |
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Pages (from-to) | 8880-8883 |
Number of pages | 4 |
Journal | Japanese Journal of Applied Physics |
Volume | 47 |
Issue number | 12 |
DOIs | |
State | Published - Dec 19 2008 |
Externally published | Yes |
Keywords
- (K,Na,Li)NbO -BaTiO
- Lead-free piezoelectric ceramics
- Phase transition