Open AccessX-ray diffraction and phase transition analysis for (K, Na)NbO3-based lead-free piezoelectric ceramics
Author(s) -
Ming Bao-Quan,
Jinfeng Wang,
Guo-Zhong Zang,
Chunming Wang,
Zhongtao Gai,
Juan Du,
Zheng Li-Mei
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5962
Subject(s) - orthorhombic crystal system , diffraction , tetragonal crystal system , materials science , piezoelectricity , monoclinic crystal system , x ray crystallography , phase (matter) , phase transition , crystallography , condensed matter physics , crystal structure , optics , physics , chemistry , composite material , quantum mechanics
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°.