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SOLID STATE & STRUCTURAL CHEMISTRY UNIT
INDIAN INSTITUTE OF SCIENCE
BANGALORE  – 560  012
 
SEMINAR
Speaker: Mr. Ashutosh Mohanty
Title:
Enhancement in Piezoelectricity near Morphotropic Phase Boundary
Date & Time: Thursday 06th September, 2018 at 4.00 PM
Venue:     SSCU AUDITORIUM
Abstract:
Piezoelectric materials are a class of materials which generate electrical potential in response to applied stress. This coupling of electrical and mechanical properties is used for various electromechanical applications. A lot of research has been going on in the field of piezo ceramic materials with an objective to enhance the piezoelectricity.
 
In this presentation I shall discuss how the concept of Morphotropic Phase Boundary (MPB) i.e., composition induced phase boundary in solid solutions, has been a tool not only to enhance the piezoelectric coefficient of the material but also to design a series of materials having improved electromechanical properties. I shall explain with examples of Pb-free and Pb-containing piezo ceramic systems and how the introduction of a small amount of structural heterogeneity near MPB compositions has a tremendous effect in increasing the electromechanical properties.
 
References:
[1] Wu Z., et al., Phys. Rev. Lett. 95, 037601 (2005)
[2] Liu W., et al., Phys. Rev. Lett. 103, 257602 (2009)
[3] Budimir M., et al., Phys. Rev. B 73, 174106 (2006)
[4] Ahart M. et al., Nature 451, 545-548 (2008)
[5] Li F. et al., Nat Commun7, 13807 (2016)
[6] Fei Li, et al., Nature Mater. 17, 349-354 (2018)
 
All are cordially invited to attend
 
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