Morphotropic phase boundary and electric properties in (1 − x)Bi0.5Na0.5TiO3–xBaSnO3 lead-free piezoelectric ceramics

2013 ◽  
Vol 24 (10) ◽  
pp. 4080-4084 ◽  
Author(s):  
Long Jiao ◽  
Fei-Fei Guo ◽  
Jin-Feng Wang ◽  
Zheng-Bin Gu ◽  
Shan-Tao Zhang ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Ceramics ◽  
Electric Properties ◽  
Lead Free

Morphotropic phase boundary and electric properties in (1−x)Bi0.5Na0.5TiO3-xBiCoO3 lead-free piezoelectric ceramics

2012 ◽  
Vol 111 (12) ◽  
pp. 124113 ◽  
Author(s):  
Fei-Fei Guo ◽  
Bin Yang ◽  
Shan-Tao Zhang ◽  
Xiao Liu ◽  
Li-Mei Zheng ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Ceramics ◽  
Electric Properties ◽  
Lead Free

Investigation of the Morphotropic Phase Boundary (MPB) of (1-x-y)BaZrO3-x(K0.45Na0.5Li0.05)NbO3-yBi (Mg0.5Ti0.5)O3

2014 ◽  
Vol 787 ◽  
pp. 242-246
Author(s):  
Rui Lin Wu ◽  
Tomoaki Karaki ◽  
Jiang Tao Zeng ◽  
Liao Ying Zheng ◽  
Wei Ruan ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Tetragonal Phase ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
Piezoelectric Ceramics ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Reaction Method ◽  
Dielectric And Piezoelectric Properties

Lead-based piezoelectric ceramics have excellent piezoelectric properties with the compositions near the rhombohedral-tetragonal morphotropic phase boundary (MPB)[1,2]. In these materials, the dielectric and piezoelectric properties show the maximal values at MPB. For lead-free piezoelectric ceramics, finding the MPB area is a promising way to improve their properties. In this paper, the (1-x-y)BaZrO3-x(K0.45Na0.5Li0.05)NbO3-yBi (Mg0.5Ti0.5)O3 lead-free piezoelectric ceramics were prepared by solid-state reaction method, and their piezoelectric properties and dielectric properties were investigated. With the increase of KNLN content, the crystal structure changed from rombohedral phase to tetragonal phase, thus existed a MPB[3,4] between rombohedral and tetragonal phase. At room temperature, the specimen with the composition at MPB (x=0.93, y=0.01) shows the optimal piezoelectric properties (d33=225pC/N and kp=45%), which indicates that this material is a potential lead-free piezoceramic.

Construction of new morphotropic phase boundary in 0.94(K0.4−xNa0.6BaxNb1−xZrx)O3–0.06LiSbO3 lead-free piezoelectric ceramics

2011 ◽  
Vol 46 (21) ◽  
pp. 6871-6876 ◽  
Author(s):  
Wenfeng Liang ◽  
Wenjuan Wu ◽  
Dingquan Xiao ◽  
Jianguo Zhu ◽  
Jiagang Wu
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Ceramics ◽  
Lead Free

(1-x)(K0.44Na0.52Li0.04)(Nb0.84Ta0.10Sb0.06)O3-xSrTiO3 Lead Free Piezoelectric Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 1896-1898
Author(s):  
Ming He Cao ◽  
Wan Qiang Wang ◽  
Zhi Yong Yu ◽  
Hua Hao ◽  
Han Xing Liu
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Composition Range ◽  
Piezoelectric Properties ◽  
Piezoelectric Ceramics ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Sintering Behavior ◽  
Reaction Method ◽  
Na Ions

(1-x)(K0.44Na0.52Li0.04)(Nb0.84Ta0.10Sb0.06)O3-xSrTiO3 (KNNT-ST) lead free piezoelectric ceramics have been synthesized by a solid state reaction method. The effect of SrTiO3 content on the piezoelectric properties, sintering behavior and microstructure of (1-x) KNNT-x ST ceramics was investigated. The experimental results showed that the addition of SrTiO3 can restrain the volatilization of Na ions and K ions and improve relative density of the samples. A morphotropic phase boundary between orthorhombic and tetragonal phases is found in the composition range of 0.03<x<0.05. The piezoelectric properties can be enhanced for (1-x) KNNT-x ST ceramics near the morphotropic phase boundary.

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