Acosta M. Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Springer International Publishing Switzerland, 2016. – 181 p. – ISBN10: 3319277553.Presents guidelines to engineer functional properties of piezoelectric systems.
Describes optimization processes to perform technological applications.
Excellent thesis presented and defended at Technical University Darmstadt.
This book addresses and analyzes the mechanisms responsible for functionality of two technologically relevant materials, giving emphasis on the relationship between structural transitions and electromechanical properties. The author investigates the atomic crystal structure and microstructure by means of thermal analysis, as well as diffraction and microscopy techniques. Electric field-, temperature- and frequency-dependent electromechanical properties are also described. Apart from this correlation between structure and properties, characterization was also performed to bridge between basic research and optimization of application-oriented parameters required for technological implementation. The author proposes guidelines to the reader in order to engineer functional properties in other piezoelectric systems, as well as in other similar functional materials with the perovskite structure
Topics
Ceramics, Glass, Composites, Natural Materials
Characterization and Evaluation of Materials
Spectroscopy and MicroscopyTheoretical Background
Dielectrics
Classification of Dielectrics
Ferroelectrics
Relaxor Ferroelectrics
Electromechanical Enhancements in Ferroelectrics
Composition Engineering
Structure Engineering
Literature Review: Piezoceramics for Actuator Applications
The (1 − x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 System
Processing
Atomic Structure
Microstructure
Electromechanical Properties
The (1 − x)(Bi1/2Na1/2)TiO3–xSrTiO3 System
Processing
Atomic Structure
Microstructure
Electromechanical Properties
Experimental Procedure
Powder and Ceramic Processing
Structural Characterization
Thermal Analysis
Electrical Characterization
Conclusions
Remarks and Future Work
Appendix
Nomenclature for Core-Shell Microstructures
Electromechanical Equations
Dielectric Relaxation in the (1 − x)Ba(Zr0.2Ti0.8)O3–x; (Ba0.7Ca0.3)TiO3 System
Cycling Reliability of the (1 − x)(Bi1/2Na1/2)TiO3–x SrTiO3 System
Application-Oriented Characterization