Ayrikyan, Azatuhi ; Rojas, Virginia ; Molina-Luna, Leopoldo ; Acosta, Matias ; Koruza, Jurij ; Webber, Kyle G. (2015)
Enhancing Electromechanical Properties of Lead-Free Ferroelectrics With Bilayer Ceramic/Ceramic Composites.
In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 62 (6)
doi: 10.1109/TUFFC.2014.006673
Article, Bibliographie
Abstract
The macroscopic electromechanical behavior of lead-free bilayer composites was characterized at room temperature. One layer consisted of a nonergodic relaxor,(Bi1/2 1 Na /2)TiO3–7 , BaTiO3 with an electric-field-induced longrange ferroelectric order, whereas the other is understood to be an ergodic relaxor [(Bi N 1/2 1 a ) /2 TiO3–25SrTiO3] that undergoes a reversible electric-field-induced macroscopic nonpolar-to-polar transition. Microstructural evidence of a bilayer with low diffusion between the two components is also demonstrated. By taking advantage of the different macroscopic strain– and polarization–electric-field responses of the two constituents, internal mechanical and electrical fields can be developed that enhance the unipolar strain over that expected by a rule of mixtures approximation, thereby improving the properties needed for application of such materials to actuator systems. It is possible through further tailoring of the volume fractions and macroscopic properties of the constituents to optimize the electromechanical properties of multilayer lead-free ferroelectrics.
| Item Type: | Article |
|---|---|
| Erschienen: | 2015 |
| Creators: | Ayrikyan, Azatuhi ; Rojas, Virginia ; Molina-Luna, Leopoldo ; Acosta, Matias ; Koruza, Jurij ; Webber, Kyle G. |
| Type of entry: | Bibliographie |
| Title: | Enhancing Electromechanical Properties of Lead-Free Ferroelectrics With Bilayer Ceramic/Ceramic Composites |
| Language: | English |
| Date: | 3 February 2015 |
| Publisher: | IEEE |
| Journal or Publication Title: | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control |
| Volume of the journal: | 62 |
| Issue Number: | 6 |
| DOI: | 10.1109/TUFFC.2014.006673 |
| Abstract: | The macroscopic electromechanical behavior of lead-free bilayer composites was characterized at room temperature. One layer consisted of a nonergodic relaxor,(Bi1/2 1 Na /2)TiO3–7 , BaTiO3 with an electric-field-induced longrange ferroelectric order, whereas the other is understood to be an ergodic relaxor [(Bi N 1/2 1 a ) /2 TiO3–25SrTiO3] that undergoes a reversible electric-field-induced macroscopic nonpolar-to-polar transition. Microstructural evidence of a bilayer with low diffusion between the two components is also demonstrated. By taking advantage of the different macroscopic strain– and polarization–electric-field responses of the two constituents, internal mechanical and electrical fields can be developed that enhance the unipolar strain over that expected by a rule of mixtures approximation, thereby improving the properties needed for application of such materials to actuator systems. It is possible through further tailoring of the volume fractions and macroscopic properties of the constituents to optimize the electromechanical properties of multilayer lead-free ferroelectrics. |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials |
| Date Deposited: | 03 Nov 2015 10:19 |
| Last Modified: | 08 Dec 2015 16:16 |
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