Abstract
Improved performance by texturing has become attractive in the field of lead‐free ferroelectrics, but the effect depends heavily on the degree of texture, type of preferred orientation, and whether the material is a rotator or extender ferroelectric. Here, we report on successful texturing of K0.5Na0.5NbO3 (KNN) ceramics by alignment of needlelike KNN templates in a matrix of KNN powder using tape casting. Homotemplated grain growth of the needles was confirmed during sintering, resulting in a high degree of texture parallel to the tape casting direction (TCD) and the aligned needles. The texture significantly improved the piezoelectric response parallel to the tape cast direction, corresponding to the direction of the strongest <001>pc orientation, while the response normal to the tape cast plane was lower than for a nontextured KNN. In situ X‐ray diffraction during electric field application revealed that non‐180° domain reorientation was enhanced by an order of magnitude in the TCD, compared to the direction normal to the tape cast plane and in the nontextured ceramic. The effect of texture in KNN is discussed with respect to possible rotator ferroelectric properties of KNN.
Authors
8
- Astri Bjørnetun Haugen (first)
- Gerhard Henning Olsen (additional)
- Francesco Madaro (additional)
- Maxim I. Morozov (additional)
- Goknur Tutuncu (additional)
- Jacob L. Jones (additional)
- Tor Grande (additional)
- Mari‐Ann Einarsrud (additional)
References
38
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Dates
Type | When |
---|---|
Created | 10 years, 11 months ago (Sept. 12, 2014, 3:48 a.m.) |
Deposited | 1 year, 11 months ago (Sept. 18, 2023, 2:02 a.m.) |
Indexed | 2 days, 19 hours ago (Sept. 3, 2025, 5:50 a.m.) |
Issued | 10 years, 11 months ago (Sept. 12, 2014) |
Published | 10 years, 11 months ago (Sept. 12, 2014) |
Published Online | 10 years, 11 months ago (Sept. 12, 2014) |
Published Print | 10 years, 9 months ago (Dec. 1, 2014) |
Funders
4
NTNU
Research Council of Norway
10.13039/501100005416
Norges ForskningsrådRegion: Europe
gov (National government)
Labels
3
- Forskningsrådet
- Norwegian Research Council
- Research Council of Norway
Awards
1
- 197497/F20
U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
Awards
1
- DE-AC02-06CH11357
U.S. Department of the Army
Awards
1
- W911NF-09-1-0435
@article{Haugen_2014, title={Piezoelectric <scp><scp>K</scp></scp>0.5<scp><scp>Na</scp></scp>0.5<scp><scp>NbO</scp></scp>3 Ceramics Textured Using Needlelike <scp><scp>K</scp></scp>0.5<scp><scp>Na</scp></scp>0.5<scp><scp>NbO</scp></scp>3 Templates}, volume={97}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/jace.13223}, DOI={10.1111/jace.13223}, number={12}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={Haugen, Astri Bjørnetun and Olsen, Gerhard Henning and Madaro, Francesco and Morozov, Maxim I. and Tutuncu, Goknur and Jones, Jacob L. and Grande, Tor and Einarsrud, Mari‐Ann}, editor={Johnson, D.}, year={2014}, month=sep, pages={3818–3825} }