Publications related to Electroceramics

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The optical control of domain structures in ferroelectrics is of great interest. In the present work, we demonstrate the reliable creation of charged domain walls - conductive channels in otherwise insulating barium titanate - by a combined effect of light and electric field. We propose a scenario for the documented process, in which the bulk photovoltaic effect plays the key role, providing charge screening at the walls. Our scenario is supported by the results of phase-field simulations. The results are o

Abnormal electrical breakdowns have been observed in the grid system of ion thrusters during both ground tests and space missions, leading to severe discharge-induced damage. Alumina ceramic, commonly used as an insulating material in grid systems, is subject to surface modification under ion beam irradiation, which in turn significantly alters its surface charging behavior. In this study, we systematically investigated the charging characteristics of alumina ceramics after Xe+ ion irradiation, including tr

Advanced semiconducting materials such as transition metal dichalcogenides exhibit significant potential for the development of next‐generation optoelectronic devices. Specifically, the construction of an efficient heterostructure is imperative for achieving enhanced sensing capabilities, particularly in broadband light detection. In this study, a novel adaptive approach to enhance the photosensing abilities of multilayer MoS 2 is introduced, as it is more easily fabricable compared to its single‐layer coun

In this work, the fabrication of Rochelle salt based piezoelectric textiles are shown. Structures composed of fibers and Rochelle salt are easily produced using green processes. Both manufacturing and the material itself are really efficient in terms of en ...

Reduction-oxidation cycling of Ni-based electrodes for solid oxide fuel/electrolysis cells irreversibly alters their microstructure and can cause the fracture of the electrolyte. Non-destructive 3-D imaging enables tracking of microstructural changes that ...

We present a complete wafer level microfabrication process for the production of unimorph MEMS energy harvesters based on thinned bulk piezoelectric ceramic, lead zirconate titanate (PZT), sheets. This process eliminates the need for individual bonding of PZT pieces and proof masses at the chip level while still benefitting from the excellent properties of bulk PZT. With the process presented in this paper, 20 piezoelectric energy harvesters have been fabricated in parallel at the wafer level by bonding a s

Limited reliability of ferroelectric-based actuators restricts their use in high-performance applications, where stress-induced cracking of ferroelectric ceramics often leads to fatal failure. The main limiting factors are the relatively small fracture toughness and the brittle nature of ferroelectrics. However, ferroelectrics naturally exhibit fracture toughening (so called ferroelastic toughening) due to stress induced reorientation of non-180 degrees domains that inhibits crack propagation. Here we prese

A uniaxial compressive stress significantly modifies the dielectric and piezoelectric response of Pb(Zr,Ti)O3 (PZT)-based piezoceramics. In soft PZT, the pre-stress decreases both the piezoelectric coefficient and its increment with increasing dynamical stress amplitude. However, an increase of both quantities is shown in hard PZT. Similar effects are observed in the dielectric response. It is proposed that the differences between such behaviors are due to the possibility of domain coalescence in the materi

The position of (Fe-Zr',(Ti)-V-O(center dot center dot))(center dot) defect complexes in Pb[Zr0.52Ti0.48]O-3 (PZT) piezoelectric ceramics was investigated by means of electron paramagnetic resonance (EPR) spectroscopy. The method of analysis pursued to obtain information on the (Fe-Zr',(Ti)-V-O(center dot center dot))(center dot) position is to compare the EPR spectra of Fe3+-doped PZT specimen at different states, i.e., a powder that is representative for a system with considerably reduced amount of non-18

Ni-YSZ anode supports were used to fabricate test cells composed of yttria-stabilised zirconia (YSZ) electrolyte and lanthanum strontium ferrite (LSF) or lanthanum strontium manganite (LSM) / YSZ cathodes. These cells were operated at 720 °C at an average ...

The integration of ferroelectric polymer gates on a Mn-doped GaAs magnetic channel provides a promising route for the persistent field-effect control of magnetic properties in high-quality diluted magnetic semiconductors (DMSs) that are otherwise incompatible with traditional oxide ferroelectrics. That control demands the thinnest possible DMS layers, for which to date the Curie temperature (T-C) is severely depressed. Here we show that reducing the channel thickness from 7 to 3-4 nm by etching, followed by

Electroceramics

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Photovoltaic creation of charged domain walls in barium titanate

Investigation of surface charging characteristics of ion-irradiated alumina ceramics: Transition from secondary electron emission to charge injection

Synergistic Enhancement of Photoresponse and Broadband Detection via Quantum Dot‐Sensitized Hexagonal Nanoporous MoS 2 matrix

Green piezoelectric for autonomous smart textile

Characterization of Cracks and their Effects on the Effective Transport Pathways in Ni-YSZ Anodes after Reoxidation Using X-Ray Nanotomography

Vibrational piezoelectric energy harvesters based on thinned bulk PZT sheets fabricated at the wafer level

Phase field simulations of ferroelastic toughening: The influence of phase boundaries and domain structures

Effect of Uniaxial Compressive Stress on Dielectric and Piezoelectric Responses in Lead Zirconate Titanate Based Ceramics

Position of defects with respect to domain walls in Fe[sup 3+]-doped Pb[Zr[sub 0.52]Ti[sub 0.48]]O[sub 3] piezoelectric ceramics

X-ray Imaging and Analysis of 3D Microstructural Changes in Aged Ni-YSZ Anode

Enhanced Curie temperature and nonvolatile switching of ferromagnetism in ultrathin (Ga,Mn)As channels