Project H – Stress Modulated Electromechanical Coupling of Lead-Free Ferroelectrics

Photoferroelectrics possess both ferroelectricity as well as light sensitivity, which is interesting for multisource energy harvesting. Despite their potential importance, there remain a number of open questions that will be addressed in this project. Therefore, the aim of this project is to experimentally investigate the influence of stress on photoferroelectrics. Here, compositional band gap tuning will be accomplished through data driven automated powder dosing system to carefully control the composition over a widely material range. Following this, a combination of macroscopic and stress-dependent diffraction, microscopy, and spectroscopy techniques will be employed to experimentally characterize the influence of mechanical stress. Here, collaboration with our partners at the Nagoya Institute of Technology will be important.

Principal Investigators

	Prof. Dr. Kyle G. Webber Institute of Glass and Ceramics Materials Science Department Friedrich-Alexander-Universität Erlangen-Nürnberg kyle.g.webber@fau.de
	Prof. Dr. Koichi Hayashi Frontier Research Institute for Materials Science Nagoya Institute of Technology, Japan hayashi.koichi@nitech.ac.jp

Doctoral Researchers

M.Sc. Viktoria Kraft
Institute of Glass and Ceramics
Materials Science Department
Friedrich-Alexander-Universität Erlangen-Nürnberg
viktoria.kraft@fau.de

Associated Researchers

Dr. Lixu Xie (FAU): lixu.xie@fau.de

Dr. Koji Kimura (NITech)

Publications Project H

2024

Dobesh D., Gadelmawla A., Miyazaki H., Hinterstein M., Kimura K., Maier J., Banerjee S., Zeair O., Mehta S., da Silva LL., Khansur NH., Hayashi K., de Ligny D., Webber KG., Cicconi MR.:
The role of Ca/Zr ratio on the local structure and phase transitions in lead-free (Ba,Ca)(Zr,Ti)O3
In: Journal of the European Ceramic Society (2024)
ISSN: 0955-2219
DOI: 10.1016/j.jeurceramsoc.2024.03.003

2023

Eyoum G., Eckstein U., Ursic H., Pinto-Salazar M., Buntkowsky G., Groszewicz PB., Checchia S., Hayashi K., Webber KG., Khansur NH.:
Influence of temperature-induced A-site cation redistribution on the functional properties of A-site complex polar perovskite K1/2Bi1/2TiO3
In: Journal of Materials Chemistry A (2023)
ISSN: 2050-7488
DOI: 10.1039/d3ta00808h
Eyoum G., Gadelmawla A., Webber KG.:
Atmosphere and cooling rate effect on the dielectric behavior of the lead-free piezoelectric Bi1/2K1/2TiO3
In: Ceramics International (2023)
ISSN: 0272-8842
DOI: 10.1016/j.ceramint.2023.03.002

2022

Eyoum G., Eckstein U., Rieß K., Gadelmawla A., Springer E., Webber KG., Khansur NH.:
Sintering condition-dependent electromechanical behavior of the lead-free piezoelectric Bi1/2K1/2TiO3
In: Journal of Materials Science (2022)
ISSN: 0022-2461
DOI: 10.1007/s10853-022-07630-w
Gadelmawla A., Dobesh D., Eckstein U., Grübl O., Ehmke M., Cicconi MR., Khansur NH., de Ligny D., Webber KG.:
Influence of stress on the electromechanical properties and the phase transitions of lead-free (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3
In: Journal of Materials Science (2022)
ISSN: 0022-2461
DOI: 10.1007/s10853-022-07685-9
Gadelmawla A., Eckstein U., Rieß K., Liu YX., Wang K., Li JF., Kakimoto KI., Khansur NH., Webber KG.:
Temperature- and stress-dependent electromechanical properties of phase-boundary-engineered KNN-based piezoceramics
In: Journal of the American Ceramic Society (2022)
ISSN: 0002-7820
DOI: 10.1111/jace.18917
Hayashi K., Lederer M., Fukumoto Y., Goto M., Yamamoto Y., Happo N., Harada M., Inamura Y., Oikawa K., Ohoyama K., Wellmann P.:
Determination of site occupancy of boron in 6H-SiC by multiple-wavelength neutron holography
In: Applied Physics Letters 120 (2022), Art.Nr.: 132101
ISSN: 0003-6951
DOI: 10.1063/5.0080895
Martin A., Brehl M., Khansur NH., Werr F., de Ligny D., Webber KG.:
Brillouin spectroscopy study of the stress-induced ferroelectric order in lead-free relaxor 0.93(Na1/2Bi1/2)TiO3-0.07BaTiO3 ceramics
In: Acta Materialia 238 (2022), Art.Nr.: 118218
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2022.118218
Martin A., Brehl M., Khansur NH., Werr F., de Ligny D., Webber KG.:
Brillouin spectroscopy study of the stress-induced ferroelectric order in lead-free relaxor 0.93(Na1/2Bi1/2)TiO3-0.07BaTiO3 ceramics
In: Acta Materialia 238 (2022), S. 118218
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2022.118218
Wahl L., Maier J., Schmiedeke S., The-An Pham ., Fey T., Webber KG., Travitzky N., Khansur NH.:
Electromechanical properties of paper-derived potassium sodium niobate piezoelectric ceramics
In: Journal of the American Ceramic Society (2022)
ISSN: 0002-7820
DOI: 10.1111/jace.18655
Yamamoto Y., Kawamura K., Sugimoto H., Gadelmawla A., Kimura K., Happo N., Tajiri H., Webber KG., Kakimoto K., Hayashi K.:
Significant displacement of calcium and barium ions in ferroelectric (Ba0.9Ca0.1)TiO3 revealed by x-ray fluorescence holography
In: Applied Physics Letters 120 (2022)
ISSN: 0003-6951
DOI: 10.1063/5.0076325
Yamamoto Y., Kimura K., Gadelmawla A., Kawamura K., Sugimoto H., Liu D., Li Q., Yan Q., Khansur NH., Happo N., Kakimoto KI., Webber KG., Hayashi K.:
Local Structural Investigation of (Ba,Ca)(Zr,Ti)O3 and Ca(Zr,Ti)O3 by X-Ray Fluorescence Holography
In: physica status solidi (b) (2022)
ISSN: 0370-1972
DOI: 10.1002/pssb.202100609

2021

Gadelmawla A., Rieß K., Birkenstock J., Hinterstein M., Webber KG., Khansur NH.:
Effect of varying Bi content on the temperature-dependent mechanical, dielectric, and structural properties of nominal Na1/2Bi1/2TiO3
In: Journal of Applied Physics 130 (2021), Art.Nr.: 185106
ISSN: 0021-8979
DOI: 10.1063/5.0070594
Khansur NH., Eckstein U., Bergler M., Martin A., Wang K., Li JF., Cicconi MR., Hatano K., Kakimoto KI., de Ligny D., Webber KG.:
In situ combined stress- and temperature-dependent Raman spectroscopy of Li-doped (Na,K)NbO3
In: Journal of the American Ceramic Society (2021)
ISSN: 0002-7820
DOI: 10.1111/jace.18269
Nishiyama H., Martin A., Hatano K., Kishimoto S., Sasaki N., Webber KG., Kakimoto KI.:
Alkali volatilization of (Li,Na,K)NbO3-based piezoceramics and large-field electrical and mechanical properties
In: Journal of the Ceramic Society of Japan 129 (2021), S. 127-134
ISSN: 1882-0743
DOI: 10.2109/jcersj2.20201

2020

Khansur NH., Biggemann J., Stumpf M., Rieß K., Fey T., Webber KG.:
Temperature- and Stress-Dependent Electromechanical Response of Porous Pb(Zr,Ti)O3
In: Advanced Engineering Materials (2020)
ISSN: 1438-1656
DOI: 10.1002/adem.202000389
Khansur NH., Martin A., Rieß K., Nishiyama H., Hatano K., Wang K., Li JF., Kakimoto KI., Webber KG.:
Stress-modulated optimization of polymorphic phase transition in Li-doped (K,Na)NbO3
In: Applied Physics Letters 117 (2020), Art.Nr.: 032901
ISSN: 0003-6951
DOI: 10.1063/5.0016072
Lorenz MM., Martin A., Webber KG., Travitzky N.:
Electromechanical Properties of Robocasted Barium Titanate Ceramics
In: Advanced Engineering Materials (2020)
ISSN: 1438-1656
DOI: 10.1002/adem.202000325
Nishiyama H., Martin A., Hatano K., Kishimoto S., Sasaki N., Khansur NH., Webber KG., Kakimoto KI.:
Electric-field-induced strain of (Li,Na,K)NbO3-based multilayered piezoceramics under electromechanical loading
In: Journal of Applied Physics 128 (2020)
ISSN: 0021-8979
DOI: 10.1063/5.0029615