Anton, Eva-Maria ; Schmitt, Ljubomira Ana ; Hinterstein, Manuel ; Trodahl, Joe ; Kowalski, Ben ; Jo, Wook ; Kleebe, Hans-Joachim ; Rödel, Jürgen ; Jones, Jacob L. (2012)
Structure and temperature-dependent phase transitions of lead-free Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3–K0.5Na0.5NbO3 piezoceramics.
In: Journal of Materials Research, 27 (19)
doi: 10.1557/jmr.2012.195
Article, Bibliographie
Abstract
Structure and phase transitions of (1 − y)((1 − x)Bi1/2Na1/2TiO3–xBi1/2K1/2TiO3)–yK0.5Na0.5NbO3 (x; y) piezoceramics (0.1 ≤ x ≤ 0.4; 0 ≤ y ≤ 0.05) were investigated by transmission electron microscopy, neutron diffraction, temperature-dependent x-ray diffraction, and Raman spectroscopy. The local crystallographic structure at room temperature (RT) does not change by adding K0.5Na0.5NbO3 to Bi1/2Na1/2TiO3–xBi1/2K1/2TiO3 for x = 0.2 and 0.4. The average crystal structure and microstructure on the other hand develop from mainly long-range polar order with ferroelectric domains to short-range order with polar nanoregions displaying a more pronounced relaxor character. The (0.1; 0) and (0.1; 0.02) compositions exhibit monoclinic Cc space group symmetry, which transform into Cc + P4bm at 185 and 130 °C, respectively. This high temperature phase is stable at RT for the morphotropic phase boundary compositions of (0.1; 0.05) and all compositions with x = 0.2. For the compositions of (0.1; 0) and (0.1; 0.02), local structural changes on heating are evidenced by Raman; for all other compositions, changes in the long-range average crystal structure were observed.
Item Type: | Article |
---|---|
Erschienen: | 2012 |
Creators: | Anton, Eva-Maria ; Schmitt, Ljubomira Ana ; Hinterstein, Manuel ; Trodahl, Joe ; Kowalski, Ben ; Jo, Wook ; Kleebe, Hans-Joachim ; Rödel, Jürgen ; Jones, Jacob L. |
Type of entry: | Bibliographie |
Title: | Structure and temperature-dependent phase transitions of lead-free Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3–K0.5Na0.5NbO3 piezoceramics |
Language: | English |
Date: | 14 October 2012 |
Publisher: | Cambridge University Press |
Journal or Publication Title: | Journal of Materials Research |
Volume of the journal: | 27 |
Issue Number: | 19 |
DOI: | 10.1557/jmr.2012.195 |
Abstract: | Structure and phase transitions of (1 − y)((1 − x)Bi1/2Na1/2TiO3–xBi1/2K1/2TiO3)–yK0.5Na0.5NbO3 (x; y) piezoceramics (0.1 ≤ x ≤ 0.4; 0 ≤ y ≤ 0.05) were investigated by transmission electron microscopy, neutron diffraction, temperature-dependent x-ray diffraction, and Raman spectroscopy. The local crystallographic structure at room temperature (RT) does not change by adding K0.5Na0.5NbO3 to Bi1/2Na1/2TiO3–xBi1/2K1/2TiO3 for x = 0.2 and 0.4. The average crystal structure and microstructure on the other hand develop from mainly long-range polar order with ferroelectric domains to short-range order with polar nanoregions displaying a more pronounced relaxor character. The (0.1; 0) and (0.1; 0.02) compositions exhibit monoclinic Cc space group symmetry, which transform into Cc + P4bm at 185 and 130 °C, respectively. This high temperature phase is stable at RT for the morphotropic phase boundary compositions of (0.1; 0.05) and all compositions with x = 0.2. For the compositions of (0.1; 0) and (0.1; 0.02), local structural changes on heating are evidenced by Raman; for all other compositions, changes in the long-range average crystal structure were observed. |
Uncontrolled Keywords: | Lead-free piezoceramic, BNT-BKT, BNT-BKT-KNN, relaxor ferroelectric, TEM, Raman, X-ray diffraction |
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: | 31 Aug 2012 12:42 |
Last Modified: | 12 Aug 2021 11:56 |
PPN: | |
Export: | |
Suche nach Titel in: | TUfind oder in Google |
Send an inquiry |
Options (only for editors)
Show editorial Details |