Abstract:
The present application relates to stacked piezoelectric energy harvesters that include compliant layers between piezoelectric layers. The energy harvesters are useful in various structures and devices, including tissue-stimulating implants, such as spinal fusion implants. The present application also relates to methods of increasing the power output of a piezoelectric energy harvester through the inclusion of compliant layers.
Abstract:
Disclosed herein integrated plasmonic-ferroelectric materials and methods of making and methods of use thereof. The integrated plasmonic-ferroelectric materials comprise a ferroelectric particle and a plurality of plasmonic particles disposed on the ferroelectric particle and in physical contact with the ferroelectric particle.
Abstract:
The invention relates generally to electroactive material actuators (and combined sensor-actuators) having embedded magnetic particles for facilitating enhanced actuation and/or sensing effects.
Abstract:
In one general aspect, an apparatus comprises a material including a non-layered mixture of an elastomeric polymer with a plurality of voids; and a plurality of conductive fillers disposed in the elastomeric polymer. The apparatus may produce an electrical response to deformation and, thus, function as a strain gauge. The conductive fillers may include conductive nanoparticles and/or conductive stabilizers. In another general aspect, a method of measuring compression strain includes detecting, along a first axis, an electrical response generated in response to an impact to a uniform composite material that includes conductive fillers and voids disposed throughout an elastomeric polymer, and determining a deformation of the impact based on the electrical response. The impact may be along a second axis different from the first axis.
Abstract:
The invention relates to a nano power-generating device, comprising: a base substrate; a hexagonal boron-nitride atomic layer formed on the base substrate; a first electrode formed on the hexagonal boron-nitride atomic layer; and a second electrode formed on the hexagonal boron-nitride atomic layer and spaced apart from the first electrode. The nano power-generating device of the present invention may operate in a continuous and independent manner using the piezoelectric characteristics of the hexagonal boron-nitride atomic layer.
Abstract:
A parylene C polymer that is electrically poled such that it is piezoelectric is presented. Methods for manufacturing the piezoelectric parylene C polymer with an optimal piezoelectric coefficient d33 are also disclosed. Actuators formed with piezoelectric parylene C are disclosed as well as sensor devices that incorporate piezoelectric parylene C using charge integrator circuits in which the integration time is longer than likely adiabatic temperature transients.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Verkleben von Bauteilen unter Ausbildung einer mindestens im Temperaturbereich von ≥ 100 °C bis ≤ 160 °C funktionsfähigen Klebstoffschicht, wobei die Klebstoffschicht aus einem härtbaren Reaktionsharzsystem erhalten wird. Das Reaktionsharzsystem umfasst eine Epoxidharzkomponente (A) und in der Epoxidharzkomponente (A) dispergierte Polymerpartikel (B), wobei weiterhin die dispergierten Polymerpartikel additionsvernetztes Silikonelastomer umfassen. Die Erfindung betrifft weiterhin die Verwendung eines Reaktionsharzsystems zum Verkleben von piezoelektrische Keramiken und/oder Elemente der seltenen Erden umfassende Permanentmagnete und eine Bauteilanordnung, umfassend eine piezoelektrische Keramik, eine Impedanzanpassungsschicht sowie eine mit der piezoelektrischen Keramik und der Impedanzanpassungsschicht in Kontakt befindliche Klebstoffschicht.
Abstract:
The present invention provides a piezo-electric composite sensor comprising a piezo-electric material layer formed of a piezo-electric composite obtained by mixing piezo-electric material powder with a polymer, and electrodes formed of a conductive composite or conductive polymer obtained by mixing conductive filling particles with a polymer matrix and formed on both surfaces of the piezo-electric material layer. The piezo-electric composite sensor of the present invention has advantages of superior piezo-electric and dielectric properties, high mechanical strength, improved reliability and process flexibility, a simplified process and reduced process costs, and improved productivity.
Abstract:
The invention relates to a composite material (5) comprising a first and a second constituent (11, 12) that are interconnected with material fit. The first constituent (11) behaves like a piezoelectric material, and the second constituent (12) behaves like a magnetoelastic material. The composite material is especially well-suited for use in a sensor element or in an actuator element, for example, a rotational-speed sensor, current sensor, torque sensor, force sensor or a passive sensor element. The invention also relates to methods for producing the composite material. A first method involves the compaction and sintering of a powder mixture, which consists of a first powder containing the first constituent (11) and of a second powder containing the second constituent (12). A second method involves the application of a coating containing one of the two constituents (11, 12) onto nanoscalar powder particles containing the other respective constituent (11, 12). A third method involves the creation of a layer (13, 14) containing one of both constituents (11) by sputter deposition or vapor deposition on a substrate, and a layer (13, 14) containing the other respective constituent is subsequently applied to this layer (13, 14).