TU Darmstadt / ULB / TUbiblio

Structure and temperature-dependent phase transitions of lead-free Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3–K0.5Na0.5NbO3 piezoceramics

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 Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details