Abstract:
Piezoelectric composite materials with high loading of piezoelectric ceramic filler of greater than 60 vol. % and up to 90 vol. % exhibit high piezoelectric properties. The higher loading of some embodiments of the composites is made possible by a low-temperature, highpressure process used to manufacture the composites. The polymer-ceramic piezoelectric composite may include a polymer matrix and a piezoelectric ceramic filler dispersed in the polymer matrix, wherein the composite comprises 60 vol. % to 90 vol. %, based on the total volume of the composite, of the piezoelectric ceramic filler. A method for manufacturing the composite may include cold sintering a mixture comprising polymer particles and piezoelectric ceramic particles.
Abstract:
A polymer composite exhibiting piezoelectric properties can be formed for flexible and/or thin film applications, in which the polymer composite includes a polymer matrix and a piezoelectric ceramic filler embedded in the polymer matrix. The polymer matrix may include at least two polymers: a first polymer and a second polymer. The first polymer may be a fluorinated polymer, and the second polymer may be compatible with the first polymer and have a dielectric constant of less than approximately 20. The piezoelectric ceramic filler may be a lead-free ceramic filler, such as barium titanate, and be approximately 40-70% by volume of the polymer composite. The remaining 30-60% by volume may be the polymer matrix, which may itself be approximately 5-20% by weight second polymer and 80-95% fluorinated polymer.
Abstract:
Método y composición para fabricar un material con forma de placa generadora de iones negativos, para ser instalada como dispositivo ionizador de iones negativos, en todo tipo de filtros de aire y en todo tipo de motores a combustión interna, que produce una ionización de aire en la cámara de combustión del motor, mejorando la combustión del motor, bajando las emisiones contaminantes y aumentando el rendimiento del combustible del motor; cuya composición comprende: de 1% a 90 de turmalina, de preferencia 30% a 55%, de 1% a 85% de Zeolita de preferencia 15% a 60%, de 1% a 80% de cuarzo, de preferencia 30 a 60%, de 1% a 35% de roca ígnea de preferencia 10% a 25% y de Resina Epóxica con catalizador 10% a 70% de preferencia 40% a 55%.
Abstract:
Offenbart wird ein Verfahren zur Herstellung eines Kompositmaterials (101), insbesondere einer aktiven Komponente eines Sensorelements (201, 301), wobei zumindest zwei Materialien (102, 103, 202, 203) mit unterschiedlichen physikalischen und chemischen Eigenschaften in Abhängigkeit von einer Funktionalität des Sensorelements sowie eine äußere Form, in welche die zumindest zwei Materialien gebracht werden sollen, vorgegeben werden. Dabei wird die äußere Form in eine Vielzahl von virtuellen Raumbereichen (306) unterteilt, wobei in jedem virtuellen Raumbereich die Materialverteilung der zumindest zwei Materialien homogen und periodisch nach vorgegebenen Regeln entsprechend einer Mikrostruktur über ein rechnergestütztes Verfahren (FEM) ermittelt wird. Digitale Daten, die die ermittelte Verteilung der zumindest zwei Materialien beschreiben, werden dann an einen 3D Drucker übergeben und das Sensorelement oder die aktive Komponente desselben wird auf der Basis dieser Daten von dem 3D Drucker erstellt.
Abstract:
A fluid pump includes a housing defining a fluid chamber and a piezoelectric membrane located within the chamber and attached to the housing. The piezoelectric membrane may divide the fluid chamber into a first fluid cavity and a second fluid cavity such that the application of an electric field to the piezoelectric membrane and its resulting displacement may provide a force that drives fluid through the pump, e.g., from an inlet of the fluid chamber into the first fluid cavity and from the second fluid cavity to an outlet of the fluid chamber.
Abstract:
The invention is directed to a piezoelectric composite comprising (a) a polymer matrix; and (b) a plurality of coated piezoelectric filler particles that are dispersed in the polymer matrix. Further, each of the plurality of coated piezoelectric filler particles comprises a piezoelectric material having at least a portion of its outer surface coated with a polymeric material that has at least one polar functional group. The invention is further directed towards films containing such piezoelectric composites and methods of preparing such films.
Abstract:
A piezoelectric composite comprising (a) an olefin copolymer and (b) a plurality of piezoelectric filler particles is disclosed. Each of the plurality of piezoelectric filler particles can be dispersed in the olefin copolymer. Also disclosed are films containing such piezoelectric composites and methods of preparing such films.