Field-induced phase transition and relaxor character in submicrometer-structured lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 piezoceramics at the morphotropic phase boundary

2011 ◽  
Vol 58 (9) ◽  
pp. 1893-1904 ◽  
Author(s):  
L. Pardo ◽  
E. Mercadelli ◽  
A. Garcia ◽  
K. Brebol ◽  
C. Galassi
Keyword(s):  
Phase Transition ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Free

PHASE TRANSITION, DIELECTRIC AND PIEZOELECTRIC PROPERTIES OF NaNbO3–Ba0.85Ca0.15(Ti0.9Zr0.1)O3 LEAD-FREE CERAMICS

2012 ◽  
Vol 05 (03) ◽  
pp. 1250033 ◽  
Author(s):  
YUQING LEI ◽  
HONG WU ◽  
DUNMIN LIN ◽  
QIAOJI ZHENG ◽  
XIAOCHUN WU ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Solution ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
High Concentration ◽  
Lead Free Ceramics ◽  
Sintering Method ◽  
Dielectric And Piezoelectric Properties

A new lead-free solid solution of (1–x) NaNbO 3-x Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3 was prepared by a traditional sintering method and its phase transition, dielectric and piezoelectric properties were studied. Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3 diffuses into NaNbO3 lattices to form a new solid solution with perovskite structure. The addition of Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3(x≥0.025) transforms NaNbO3 from antiferroelectric to ferroelectric. The diffusive ferroelectric–paraelectric phase transition is induced in the ceramics with high concentration of Ba 0.85 Ca 0.15( Ti 0.9 Zr 0.1) O 3. The ceramics with x = 0.05–0.125 possess large Pr values of 18.6–25.5 μC/cm2. A morphotropic phase boundary between tetragonal and orthorhombic phases is formed at 0.05 < x < 0.15, leading to a significant enhancement of piezoelectric properties. The ceramic with x = 0.125 situated near the morphotropic phase boundary exhibits the optimum piezoelectric properties: d33 = 151 pC/N and kp = 31.6%.

Enhanced electrical properties near the morphotropic phase boundary in lead-free Bi0.5Na0.34K0.11Li0.05Ti1-xNixO3-δ ceramics

2021 ◽  
pp. 109716
Author(s):  
Pamornnarumol Bhupaijit ◽  
Noppadon Nuntawong ◽  
Pinit Kidkhunthod ◽  
Supree Pinitsoontorn ◽  
Theerachai Bongkarn
Keyword(s):  
Electrical Properties ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Free

scholarly journals Dual strain mechanisms in a lead-free morphotropic phase boundary ferroelectric

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Julian Walker ◽  
Hugh Simons ◽  
Denis O. Alikin ◽  
Anton P. Turygin ◽  
Vladimir Y. Shur ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Lead Free ◽  
Strain Mechanisms
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