Searched for: author%3A%22van+der+Zwaag%2C+S.%22
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van Kempen, S.E. (author), Khanbareh, H. (author), Groen, P. (author), Hol, J.M.A.M. (author), van der Zwaag, S. (author)
A novel method based on the Virtual Particle Mori–Tanaka (VPMT) is developed to predict the effective electro-elastic properties, d33 and g33, of structured piezoelectric particulate composites with improved accuracy by means of a single parameter related to the spatial distribution of imperfectly aligned rod-like PZT particles. The VPMT method...
article 2020
document
Stuber, V.L. (author), Mahon, T.R. (author), van der Zwaag, S. (author), Groen, P. (author)
Polymer-piezoceramic composites have drawn a lot of attention for sensor and energy harvesting applications. Poling such materials can be difficult due to the electric field getting mostly distributed over the low dielectric constant matrix. During this process, the electrical matrix conductivity plays a vital role. This work shows how two...
article 2020
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Deutz, D.B. (author), van der Zwaag, S. (author), Groen, P. (author)
As demand rises for flexible electronics, traditionally prepared sintered ceramic sensors must be transformed into fully new sensor materials that can bend and flex in use and integration. Negative temperature coefficient of resistance (NTC) ceramic thermistors are preferred temperature sensors for their high accuracy and excellent stability,...
article 2020
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Stuber, V.L. (author), Deutz, D.B. (author), Bennett, J. (author), Cannel, D. (author), de Leeuw, D.M. (author), van der Zwaag, S. (author), Groen, P. (author)
Vibrational piezoelectric energy harvesters are being investigated to replace batteries in embedded sensor systems. The energy density that can be harvested depends on the figure of merit, d 33 g 33 , where d 33 and g 33 are the piezoelectric charge and voltage coefficient. Commonly used piezoelectric materials are based on inorganic ceramics,...
article 2019
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Deutz, D.B. (author), Pascoe, J.A. (author), Schelen, B. (author), van der Zwaag, S. (author), de Leeuw, D.M. (author), Groen, P. (author)
Piezoelectric energy harvesters are at the front of scientific research as enablers of renewable, sustainable energy for autonomous wireless sensor networks. Crucial for this disruptive technology is the achievable output power. Here we show, analytically, that the maximum output energy per unit volume, under a single sinusoidal excitation, is...
article 2018
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Khanbareh, H. (author), de Boom, K. (author), van der Zwaag, S. (author), Groen, W.A. (author)
Tri-phase PZT-porous polyurethane (PU) composites are investigated with the aim of developing conformable, highly sensitive tactile sensors for application in Human-Machine Interactions. The main goal is to reduce the dielectric constant of the polymer matrix, and improve flexibility of traditional diphase piezo-composites, consisting of ceramic...
article 2017
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Khanbareh, H. (author), de Boom, K. (author), Schelen, B. (author), Scharff, R.B.N. (author), Wang, C.C.L. (author), van der Zwaag, S. (author), Groen, P. (author)
The need for flexible, highly sensitive tactile sensors that can fit onto curved surfaces is driving the conformable sensor materials research in the field of human–machine interactions. Here we report a new type of compliant piezoelectric active composite, a micro-porous polyurethane-PZT material, capable of generating a voltage output upon...
article 2017
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Khaliq, J. (author), Deutz, D.B. (author), Frescas, J.A.C. (author), Vollenberg, P. (author), Hoeks, T. (author), van der Zwaag, S. (author), Groen, P. (author)
Piezoelectric composites made from soft and hard lead zirconium titanate (PZT) particles as filler and an epoxy as the matrix were prepared by dielectrophoresis and studied for their piezoelectric properties. It was found that the dielectric constant of the piezoelectric filler plays a significant role in determining the final piezoelectric...
article 2017
document
Deutz, D.B. (author), Mascarenhas, N.T. (author), Schelen, J.B.J. (author), de Leeuw, D.M. (author), van der Zwaag, S. (author), Groen, P. (author)
A highly sensitive, lead-free, and flexible piezoelectric touch sensor is reported based on composite films of alkaline niobate K0.485Na0.485Li0.03NbO3 (KNLN) powders aligned in a polydimethylsiloxane (PDMS) matrix. KNLN powder is fabricated by solid-state sintering and consists of microcubes. The particles are dispersed in uncured PDMS and...
article 2017
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Valente, R. (author), de Ruijter, C. (author), Vlasveld, D. (author), van der Zwaag, S. (author), Groen, P. (author)
Conductive polymer composites have been receiving increased interest both from the scientific community and industry with a special focus on electromagnetic interference (EMI) shielding applications. In this paper, we present the design, EM wave simulation, and validation through S-parameters measurements of an EMI shielding effectiveness (SE)...
article 2017
document
Deutz, D.B. (author), Mascarenhas, N.T. (author), van der Zwaag, S. (author), Groen, W.A. (author)
Composites of aligned (K,Na,Li)NbO3 (KNLN) piezoceramic particles in a PDMS polymer matrix are presented as promising materials for flexible sensors and energy harvesters. Their ease of processing is matched with a relatively high damage tolerance and piezoelectric performance at low dielectric loss. To maximize piezoelectric performance, the...
article 2017
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Khanbareh, H. (author), Hegde, M. (author), Bijleveld, J.C. (author), van der Zwaag, S. (author), Groen, P. (author)
High temperature ferroelectrics for thermally stable devices that can detect pressure and temperature are of great industrial interest. Here we describe composites of lead titanate (PT) particle-polyetherimide (PEI) polymers with stable dielectric and piezoelectric properties over a broad range of temperature and frequency. The reported...
article 2017
document
Deutz, D.B. (author), Mascarenhas, N.T. (author), van der Zwaag, S. (author), Groen, W.A. (author)
In this study the influence of Li substitution on the piezoelectric performance of lead free K0.5Na0.5NbO3 (KNN)-epoxy composites is explored. Cuboid KNN piezoceramic particles modified with 0 to 12 mol.% of Li are prepared via a double calcination technique. The KNN-based particles are dispersed at 10 vol.% in an epoxy matrix to develop both...
article 2017
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Shaji Karapuzha, A. (author), van der Zwaag, S. (author), Groen, W.A. (author)
Modern flexible and sensitive sensors based on polymer–ceramic composites employ lead zirconate titanate (PZT) granulates having the morphotropic phase boundary (MPB) composition as the piezo active ingredient, as this composition gives the best properties in fully ceramic piezoelectric sensors. In this study, the possibility of using PZT...
article 2016
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James, N.K. (author), Comyn, T. (author), Hall, D. (author), Daniel, L. (author), Kleppe, A. (author), van der Zwaag, S. (author), Groen, W.A. (author)
The poling behaviour of tetragonal lead zirconate titanate (PZT) piezoelectric ceramic particles in a weakly conductive ionomer polymer matrix is investigated using high energy synchrotron X-ray diffraction analysis. The poling efficiency, crystallographic texture and lattice strain of the PZT particles inside the polymer matrix are determined...
article 2016
document
James, N.K. (author), Deutz, D.B. (author), Bose, R.J. (author), van der Zwaag, S. (author), Groen, P. (author)
A high-voltage coefficient has been found in lead-free piezoelectric particulate composites based on epoxy with lead-free (K0.50Na0.50)0.94Li0.06NbO3 (KNLN) piezoceramic particles with a natural cubic morphology. The KNLN powder used in the composites has been prepared using a new solid-state double calcination processing route. These particles...
article 2016
document
Deutz, D.B. (author), Mascarenhas, N.T. (author), van der Zwaag, S. (author), Groen, P. (author)
In this study, the influence of Li substitution on the piezoelectric performance of lead-free K0.5Na0.5NbO3 (KNN)-epoxy composites is explored. KNN piezoceramic particles modified with 0-12 mol% of Li are prepared via a double calcination technique, resulting in a perovskite particulate which transitions from an orthorhombic to tetragonal...
article 2016
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Karapuzha, A.S. (author), James, N.K. (author), Khanbareh, H. (author), van der Zwaag, S. (author), Groen, W.A. (author)
The effects of Zr/Ti ratio on the dielectric and piezoelectric properties of the sintered Pb(ZrxTi(1−x))0.99Nb0.01O3 piezoelectric ceramics across the entire range of phase diagram of the PZT solid solution was studied systematically. The materials were prepared by the conventional mixed oxide process. The phase purity and crystal structure of...
article 2016
document
Loock, F.V. (author), Deutz, D.B. (author), van der Zwaag, S. (author), Groen, W.A. (author)
The active and passive piezoelectric response of lead zirconium titanate (PZT)-epoxy particulate composites loaded in shear is studied using analytical models, a finite element model and by experiments. The response is compared to that of the same composites when loaded in simple tension. Analogously to bulk PZT, particulate PZT-polymer...
article 2016
document
Khanbareh, H. (author), Hegde, M. (author), van der Zwaag, S. (author), Groen, W.A. (author)
High performance polymer-ceramic composites are presented as promising candidates for high temperature piezoelectric sensing applications. lead-titanate (PT) ceramic particulate is incorporated into a polyetherimide polymer matrix, (PEI) at a specific volume fraction of 20% in the forms of 0-3 and quasi 1-3. A conventional dielectrophoretic...
conference paper 2015
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