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物理学报. 2008, 57(9): 5962-5967.
doi: 10.7498/aps.57.5962.
铌酸钾钠基无铅压电陶瓷的X射线衍射与相变分析
- 收稿日期: 2007-12-09
- 修回日期: 2008-01-25
- 刊出日期: 2008-09-20
English Abstract
X-ray diffraction and phase transition analysis for (K, Na)NbO3-based lead-free piezoelectric ceramics
- Received Date:
09 December 2007
- Accepted Date:
25 January 2008
- Published Online:
20 September 2008
Abstract: Characteristic of the orthorhombic and tetragonal phase of (K, Na)NbO3-based lead-free piezoelectric ceramics was analyzed in theory. X-ray diffraction differences between the orthorhombic and tetragonal phase were clarified in the 2θ range from 20° to 60°. For the orthorhombic (K, Na)NbO3-based piezoelectric ceramics, the number and relative intensity of X-ray diffraction peaks were calculated from a monoclinic primitive cell. A method distinguishing orthorhombic and tetragonal phase from the X-ray diffraction patterns was proposed. It is found that the phases of (K, Na)NbO3-based piezoelectric ceramics can be distingwished exactly from peaks of the primitive cell planes (1 0 2) and (1 2 1). For the powder diffraction, the phases can be distinguished more easily by relative intensities of the diffraction peaks for the peak-split position at around 22° or 45°.
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