Phase Transition Behavior and Large Piezoelectricity Near the Morphotropic Phase Boundary of Lead‐Free ( <scp> <scp>Ba</scp> </scp> _0.85 <scp> <scp>Ca</scp> </scp> _0.15 )( <scp> <scp>Zr</scp> </scp> _0.1 <scp> <scp>Ti</scp> </scp> _0.9 ) <scp> <scp>O</scp> </scp> ₃ Ceramics

2012/11/16 by Ye Tian, Lingling Wei, Xiaolian Chao +3 · 5 citations
Materials Science · Engineering · #Ferroelectric and Piezoelectric Materials #Microwave Dielectric Ceramics Synthesis #Acoustic Wave Resonator Technologies

paper · doi:10.1111/jace.12049

Abstract

The phase transition behavior and piezoelectric properties of ( Ba 1− x Ca x )( Zr 0.1 Ti 0.9 ) O 3 and ( Ba 0.85 Ca 0.15 )( Zr y Ti 1− y ) O 3 ceramics were investigated in this work to find out the potential factors contributing to large piezoelectricity. It was found that the morphotropic phase boundary ( MPB ) of ( Ba 0.85 Ca 0.15 )( Zr 0.1 Ti 0.9 ) O 3 ceramics was closely related to the presence of an intermediate phase (considered as orthorhombic phase in this work) between rhombohedral ( R ) and tetragonal ( T ) phases at a narrow region, which could be carefully adjusted by the temperature and contents of Ca and Zr in the composition. In addition, the maximum piezoelectric and electromechanical coupling coefficients (with d 33 = 572 pC/N and k p = 0.57) were observed near the MPB region close to T phase side, which might be intimately related to the presence of the intermediate phase. This investigation yielded a new sight to understand the mechanism of enhanced piezoelectricity near the MPB .

Cited by

• Effect of precursors on the structural and electrical properties of lead-free BaCaZrTiO3 thin films
• Optimization of Processing Steps for Superior Functional Properties of (Ba, Ca)(Zr, Ti)O 3 Ceramics. [europepmc]
• Relative Investigation on Microwave-Assisted Zr-Modified PbTiO 3 and BaTiO 3 Ferroelectric Ceramics for Energy Storage Application. [europepmc]
• Influence of Grain Size on Dielectric Behavior in Lead-Free 0.5 Ba(Zr 0.2 Ti 0.8 )O 3 -0.5 (Ba 0.7 Ca 0.3 )TiO 3 Ceramics. [europepmc]
• Susceptible Antiferroelectric/Ferroelectric Transitions in Silver Niobate-Based Ceramics Induced by Manual Mechanical Processing. [europepmc]

Related

• Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 lead-free solid solution
• Evaluating the polymorphic phase transition in calcium-doped Ba(Zr_0.05Ti_0.95)O₃: a lead-free piezoelectric ceramic
• Origin of high piezoelectricity at the morphotropic phase boundary (MPB) in (Pb0.94Sr0.06)(ZrxTi1-x)O3
• Enhanced Piezoelectric Properties of ( <scp> <scp>Ba</scp> </scp> _{1− <i>x</i>} <scp> <scp>Ca</scp> </scp> _<i>x</i> )( <scp> <scp>Ti</scp> </scp> _0.92 <scp> <scp>Sn</scp> </scp> _0.08 ) <scp> <scp>O</scp> </scp> ₃ Lead‐Free Ceramics
• Large Piezoelectric Coefficient in ( <scp> <scp>Ba</scp> </scp> _{1− <i>x</i>} <scp> <scp>Ca</scp> </scp> _<i>x</i> )( <scp> <scp> Ti _0.96 Sn _0.04 </scp> </scp> ) <scp> <scp> O ₃ </scp> </scp> Lead‐Free Ceramics