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
	M.Sc. Ahmed Gadelmawla Institute of Glass and Ceramics Materials Science Department Friedrich-Alexander-Universität Erlangen-Nürnberg ahmed.gadelmawla@fau.de

Associated Researchers

Dr. Neamul Khansur (FAU): neamul.khansur@fau.de

Dr. Koji Kimura (NITech)

Publications Project H

2022

Eyoum G., Eckstein U., Rieß K., Gadelmawla A., Springer E., Webber K., 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 K.:
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 K.:
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
Yamamoto Y., Kawamura K., Sugimoto H., Gadelmawla A., Kimura K., Happo N., Tajiri H., Webber K., 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 K., 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 K., 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 K.:
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 K., 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 K.:
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 K.:
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 K., 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 K., 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