Groh, Claudia ; Jo, Wook ; Rödel, Jürgen (2014)
Tailoring Strain Properties of (0.94−x)Bi1/2Na1/2TiO3-0.06BaTiO3-xK0.5Na0.5NbO3Ferroelectric/Relaxor Composites.
In: Journal of the American Ceramic Society, 97 (5)
doi: 10.1111/jace.12783
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A remarkable progress in the quest of lead-free piezoceramics for actuator applications has been made with the development of incipient piezoceramics featured by giant strains. A drawback, however, is the high electric field required to generate this giant strain. A powerful approach to overcoming this drawback lies in relaxor/ferroelectric (FE) composites comprised such giant strain materials (matrix) and a FE or nonergodic relaxor (seed). In this study, we investigate the effect of K0.5Na0.5NbO3 content in the matrix and the volume ratio of seed to matrix using composites of 0.93Bi1/2Na1/2TiO3–0.07BaTiO3 as a seed and (0.94 − x)Bi1/2Na1/2TiO3–0.06BaTiO3–xK0.5Na0.5NbO3 as a matrix. The strain of all matrices, independent of their K0.5Na0.5NbO3 content, was found to be enhanced by adding a certain amount of seed. An optimum strain is achieved for the composite comprised of a matrix with x = 0.02 K0.5Na0.5NbO3 and 10% seed. By means of a differential analysis on the temperature-dependent dielectric permittivity, it was shown that the seed phase is still present in the composites despite the naturally expected diffusion process during sintering.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Groh, Claudia ; Jo, Wook ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Tailoring Strain Properties of (0.94−x)Bi1/2Na1/2TiO3-0.06BaTiO3-xK0.5Na0.5NbO3Ferroelectric/Relaxor Composites |
| Sprache: | Englisch |
| Publikationsjahr: | 14 Mai 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 97 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1111/jace.12783 |
| Kurzbeschreibung (Abstract): | A remarkable progress in the quest of lead-free piezoceramics for actuator applications has been made with the development of incipient piezoceramics featured by giant strains. A drawback, however, is the high electric field required to generate this giant strain. A powerful approach to overcoming this drawback lies in relaxor/ferroelectric (FE) composites comprised such giant strain materials (matrix) and a FE or nonergodic relaxor (seed). In this study, we investigate the effect of K0.5Na0.5NbO3 content in the matrix and the volume ratio of seed to matrix using composites of 0.93Bi1/2Na1/2TiO3–0.07BaTiO3 as a seed and (0.94 − x)Bi1/2Na1/2TiO3–0.06BaTiO3–xK0.5Na0.5NbO3 as a matrix. The strain of all matrices, independent of their K0.5Na0.5NbO3 content, was found to be enhanced by adding a certain amount of seed. An optimum strain is achieved for the composite comprised of a matrix with x = 0.02 K0.5Na0.5NbO3 and 10% seed. By means of a differential analysis on the temperature-dependent dielectric permittivity, it was shown that the seed phase is still present in the composites despite the naturally expected diffusion process during sintering. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 19 Mai 2014 09:37 |
| Letzte Änderung: | 19 Jan 2015 13:08 |
| PPN: | |
| Sponsoren: | Adria |
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