A5007462443- Ferroelectric and Piezoelectric Materials
- Additive Manufacturing and 3D Printing Technologies
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Conducting polymers and applications
- Advanced ceramic materials synthesis
- Microwave Dielectric Ceramics Synthesis
- Injection Molding Process and Properties
- Electrospun Nanofibers in Biomedical Applications
- Innovations in Concrete and Construction Materials
- Materials Engineering and Processing
- Bone Tissue Engineering Materials
- Dielectric properties of ceramics
- Polymer composites and self-healing
- Ultrasonics and Acoustic Wave Propagation
- Additive Manufacturing Materials and Processes
- Supercapacitor Materials and Fabrication
- Carbon Nanotubes in Composites
- Tactile and Sensory Interactions
- Manufacturing Process and Optimization
- Fiber-reinforced polymer composites
- Mechanical Behavior of Composites
- Dental Implant Techniques and Outcomes
Swiss Federal Laboratories for Materials Science and Technology
2016-2022
Technical University of Liberec
2015
University of Sheffield
2010-2013
Ceramics based on solid solutions of x BaTiO 3 –(100− )(0.5 Bi ( Zn 1/2 Ti ) O –0.5 BiScO ), where = 50, 55, and 60 were prepared by solid‐state reaction which resulted in a single perovskite phase with pseudocubic symmetry. Dielectric property measurements revealed high relative permittivity (>1000), could be modified the addition BZT BS to engineer temperature‐stable dielectric response temperature coefficient (TCε) as low −182 ppm/°C. By incorporating 2 mol% Ba vacancies into...
Additive manufacturing of metals by 3D printing polymeric filaments containing high loading metal powder, subsequent debinding, and sintering offers a potent alternative to the widespread beam-based processes. The binder is decisive component for successful fabrication process. This study presents development multi-component system filament-based 316 L stainless steel in various optimization steps. contains polyethylene (PE) backbone, which ensures structural integrity during solvent...
Alumina ceramic feedstocks with ethylene vinyl acetate and stearic acid as an organic binder were prepared shaped by a commercial 3D filament printer. Rheological properties the ability of to be processed into filaments fused deposition modeling/filament (FDM/FFF) technique investigated. The addition affects viscosity function shear rate in complex way. Analysis rheological models shows that while using small amount acid, plateau at low (cross model) can observed. At high content, yield...
The search for a piezoelectric elastomer that generates an electrical signal when pressed and stretched has increased significantly in the last decade as they hold great promise harvesting energy from human motion monitoring activities. Here, excellent elasticity of polydimethylsiloxane-based elastomers properties lead zirconate titanate (PZT) were combined and, using thermally activated poling process, elastic composites obtained. For this, two polydimethylsiloxane (PDMS) matrices with...
The use of thermoplastic elastomers with conductive fillers enables one to produce strain sensors in a variety shapes and forms using processing routes. However, some methods are costly require long production times. Filament printing, an additive manufacturing route that still exhibits high annual growth rate, is cost- time-efficient method processing. In this study commercial polyurethane (TPU) based fused deposition modelling (FDM) filament styrenic block copolymer (TPS) compound were...
An optimized recipe for 3D printing of Mullite-based structures was used to investigate the effect MgO sintering additive on processing stages and final ceramic properties. To achieve dense 3:2 mullite, filaments were prepared based an alumina powder, a methyl silicone resin, EVA elastomeric binder powder. Using 1 wt% dwell time 5 h at 1600 °C, mullite structure could be obtained from with diameter 1.75 mm. Ceramic without printed in vertical horizontal direction, direction mechanical...
Piezoelectric fibers are widely used in composites for actuator and sensor applications due to its ability convert electrical pulses into mechanical vibrations transform the returned back signal. They beneficial fabrication of especially 1–3 composites, active fiber (unidirectional axially aligned PZT sandwiched between interdigitated electrodes embedded a polymer matrix) etc, with potential medical imaging, structural health monitoring, energy harvesting, vibration noise control. However,...
Piezoelectric composites with 3-3 connectivity gathered attraction due to their potential application as an acoustic transducer in medical imaging, non-destructive testing, etc. In this contribution, piezoelectric were fabricated a material extrusion-based additive manufacturing process (MEX), also well-known under the names fused deposition modeling (FDM), filament fabrication (FFF) or ceramics (FDC). Thermoplastic filaments used achieve open and offset printed scaffold structures. Both...
Safety workwear often requires antistatic protection to prevent the build-up of static electricity and sparks, which can be extremely dangerous in a working environment. In order make synthetic fibers, electrically conducting materials such as carbon black are added fiber-forming polymer. This leads unwanted dark colors respective melt-spun fibers. To attenuate undesired color, we looked into various possibilities including embedding conductive element inside dull side-by-side bicomponent...
Multilayer structures based on the composition 0·52(0·35Bi(Mg1/2Ti1/2)O3–0·3BiFeO3–0·35BiScO3)–0·48PbTiO3 (BMFS-PT) have been fabricated with large piezoelectric activity and high TC. Reaction Pt internal electrodes during cofiring leads to a decrease in TC softening of ferroelectric response, consistent donor doping. However, this effect is minimised by extending binder burnout times up 4 h samples thicker active layers (∼100 μm). actuators BMTFS-PT should therefore increase operating...
The calcium-substituted barium titanate nanopowders Ba1−xCaxTiO3 (0.2 ≤ x 0.3) have been obtained at room temperature by mechanochemical synthesis. formation of the perovskite phase was controlled X-ray diffraction studies various milling duration. powders possess crystallographic structure directly after longer than 10 h. dielectric properties ceramics sintering were investigated in range between 300 and 500 K. dependence permittivity exhibited a single anomaly, which corresponds to...
The bulk transformer working in k33-mode both input and output circuits was studied. Theoretical model developed to describe the transformation ratio as a function of electrode size, material properties, frequency impedance load circuit. Numerical simulation allows for optimization primary aspect (l1/l ≈ 0.34) best at no-load condition. Transformation ratio, efficiency, impedances are measured set samples with variable input/output size low-power signal compared derived formulae. maximum...
The aim of this study was the electrospinning zirconia nanofibers without sol-gel precursors. Low-cost Zr-oxide and Zr-carbonate inorganic materials, with high molecular Zr-content compared to methods, were used for precursor formulation. Using a polyvinylpyrrolidone (PVP) polymeric binder, could successfully be synthesised both Zr-sources. effects different parameters investigated stabilize processing reduce deviation nanofiber diameters. Fibres calcined at 1000 °C produced from two...