Health & Environmental Research Online (HERO)


Print Feedback Export to File
7138429 
Journal Article 
Rhombohedral-Tetragonal Phase Coexistence and Piezoelectric Properties of (NaK)(NbSb)O-3-LiTaO3-BaZrO3 Lead-Free Ceramics 
Zuo, R; Fu, J; , 
2011 
Yes 
Journal of the American Ceramic Society
ISSN: 0002-7820 
WILEY 
HOBOKEN 
1467-1470 
WOS:000290530200031 
The phase transitional behavior and composition-dependent piezoelectric properties of (NaK)(NbSb)O-3-LiTaO3-BaZrO3 (NKNS-LT-BZ) pseudo-ternary system were investigated. A composition-temperature phase diagram was generalized within a certain range of BZ content in which a rhombohedral-tetragonal (R-T) ferroelectric phase boundary connecting orthorhombic and cubic phase zones is formed near room temperature between two trifurcate points. Piezoelectric and electromechanical properties of NKNS-LT-BZ ceramics exhibit optimum values of d(33) = 365 pC/N and k(p) = 45% in the vicinity of the R-T phase coexistence zone. The dielectric and ferroelectric properties and the phase transition of NKNS-LT-BZ ceramics were discussed from a crystallographic point of view.