Enhanced ferroelectric and piezoelectric properties of BCT-BZT at the morphotropic phase boundary driven by the coexistence of phases with different symmetries

2021 ◽  
Vol 104 (22) ◽  
Author(s):  
Smaranika Dash ◽  
Dhiren K. Pradhan ◽  
Shalini Kumari ◽  
Ravikant ◽  
Md. Mijanur Rahaman ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Properties ◽  
Coexistence Of Phases ◽  
Ferroelectric And Piezoelectric Properties

Dielectric, ferroelectric, and piezoelectric properties of (001) BiScO3–PbTiO3 epitaxial films near the morphotropic phase boundary

2004 ◽  
Vol 19 (2) ◽  
pp. 568-572 ◽  
Author(s):  
Juan C. Nino ◽  
Susan Trolier-McKinstry
Keyword(s):  
Dielectric Constant ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Properties ◽  
Hysteresis Loops ◽  
Epitaxial Films ◽  
Device Development ◽  
Maximum Dielectric Constant ◽  
Room Temperature Dielectric Constant ◽  
Ferroelectric And Piezoelectric Properties

The dielectric, ferroelectric, and piezoelectric properties of (001) BiScO3–PbTiO3 epitaxial films near the morphotropic phase boundary were investigated. Epitaxial films, 1-μm thick, were grown on (100) SrRuO3/(100) LaAlO3 substrates by pulsed laser deposition from a BiScO3–PbTiO3 (40/60) ceramic target. The films had room temperature dielectric constant of 850, tanδ = 0.08, and maximum dielectric constant of 5530 at 455 °C. Well-saturated hysteresis loops with a remanent polarization of 42 μC/cm2 and a coercive field of 75 kV/cm were observed. The effective transverse piezoelectric coefficient e31,f was −12 C/m2. This result is quite encouraging for sensor and actuator device development because the observed piezoelectric properties are as good as (001) oriented Pb(Zr,Ti)O3 films (e31,f ∼ –12 C/m2) while the transition temperature is 100 °C higher.

scholarly journals Accelerated search for BaTiO3-based piezoelectrics with vertical morphotropic phase boundary using Bayesian learning

2016 ◽  
Vol 113 (47) ◽  
pp. 13301-13306 ◽  
Author(s):  
Dezhen Xue ◽  
Prasanna V. Balachandran ◽  
Ruihao Yuan ◽  
Tao Hu ◽  
Xiaoning Qian ◽  
...  
Keyword(s):  
Solid Solution ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Bayesian Approach ◽  
Bayesian Learning ◽  
Piezoelectric Properties ◽  
Training Data ◽  
Materials Informatics ◽  
Initial Training ◽  
New Materials

An outstanding challenge in the nascent field of materials informatics is to incorporate materials knowledge in a robust Bayesian approach to guide the discovery of new materials. Utilizing inputs from known phase diagrams, features or material descriptors that are known to affect the ferroelectric response, and Landau–Devonshire theory, we demonstrate our approach for BaTiO3-based piezoelectrics with the desired target of a vertical morphotropic phase boundary. We predict, synthesize, and characterize a solid solution, (Ba0.5Ca0.5)TiO3-Ba(Ti0.7Zr0.3)O3, with piezoelectric properties that show better temperature reliability than other BaTiO3-based piezoelectrics in our initial training data.

Enhanced piezoelectric properties of (1 − x)BiFe0.98(Zn0.5Hf0.5)0.02O3-xBaTiO3 ceramics near the morphotropic phase boundary

2020 ◽  
Vol 49 (17) ◽  
pp. 5573-5580 ◽  
Author(s):  
Yunjing Shi ◽  
Hairui Bai ◽  
Fei Yan ◽  
Rui Hu ◽  
Kaikai Chen ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Phase Coexistence ◽  
T Phase

The component with the R–T phase coexistence near MPB affords an optimal piezoelectric coefficient (d33) of 130 pC N−1.

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