Korea Electronics Technology Institute

Other

Hyung Won Kang

Seung Ho Han

Myong Jae Yoo

In Tae Seo

Chan Sei Yoo

Hyeung-Gyu Lee

Hyeung Gyu Lee

Dong Jun Kang

Woo Sung Lee

Intae Seo

Hwi Yeol Park

Hyunseung Yang

Disclosed is a method for manufacturing a laminated piezoelectric composite. The method includes wet-mixing ceramic powder, a polymer binder, a plasticizer and a solvent for 4 to 72 hours so as to generate a mixed slurry, introducing the mixed slurry into a tape casting process so as to prepare a plurality of piezoelectric composite sheets, drying and forming the plurality of piezoelectric composite sheets using a roll-to-roll process so as to prepare the plurality of formed piezoelectric composite sheets, forming internal electrodes on the plurality of piezoelectric composite sheets so as to prepare the plurality of piezoelectric composite sheets having the internal electrodes, laminating and pressing the plurality of piezoelectric composite sheets having the internal electrodes so as to generate a piezoelectric composite sheet laminate having the internal electrodes, and cutting the piezoelectric composite sheet laminate having the internal electrodes into a desired shape and size.

Method for manufacturing flexible laminated piezoelectric composite

A stack-type piezoelectric element is implemented with a reduced capacitance value without a reduction in displacement amount. The stack-type piezoelectric element includes a piezoelectric layer formed of a piezoelectric material, and electrode layers formed in and on the piezoelectric layer and including at least one internal electrode layer formed inside the piezoelectric layer. Each of the at least one internal electrode layer includes a plurality of split electrodes that are separated and arranged in a longitudinal direction. A piezoelectric actuator including the stack-type piezoelectric element is also provided.

Stack-type piezoelectric element and piezoelectric actuator including the same

A method of forming an electrode in a ceramic transducer electronic component is provided. The method includes preparing a sintered body for a ceramic transducer containing a metal oxide, performing patterning by irradiating a laser on a surface of the sintered body for a ceramic transducer, and forming a metal electrode by performing an electroless plating process on the sintered body for a ceramic transducer on which the patterning is formed, wherein, in the performing of the patterning by irradiating the laser on the surface of the sintered body for a ceramic transducer, the patterning is performed by irradiating the laser that satisfies at least one of a predetermined power condition and a predetermined processing speed condition.

Method of forming an electrode in a ceramic transducer electronic component

Proposed is a method of manufacturing a piezoelectric composite material. The method includes the steps: wet mixing the ceramic powder, the polymer binder, the plasticizer, and the solvent for 4 to 72 hours to produce the mixed slurry, in which the amount of the polymer binder in the mixed slurry is 3 to 10 parts by weight, the amount of the plasticizer is 0.1 to 3 parts by weight, and the amount of the solvent is 30 or more to less than 50 parts by weight, based on 100 parts by weight of the ceramic powder in the mixed slurry; introducing the mixed slurry into a tape casting process to produce a piezoelectric composite sheet; drying and molding the piezoelectric composite sheet in a roll-to-roll process to form a molded piezoelectric composite sheet; laminating and compressing piezoelectric composite sheets molded to produce piezoelectric composite sheet laminates; and cutting the piezoelectric composite sheet laminate into the desired shape and size.

Method of manufacturing flexible large-area piezoelectric composite materials

A method of manufacturing a magnetoelectric composite material having a 0-3 type connectivity is provided. The manufacturing method includes manufacturing a slurry including an alignment material including one material selected from among a magnetostrictive material and a piezoelectric material. The slurry further comprises a seed composition comprising the other material from the magnetostrictive material and the piezoelectric material. The method further comprises molding the manufactured slurry to manufacture a molding material, and plasticizing and firing the molding material.

Magnetoelectric composite material and method of manufacturing the same

A magnetoelectric energy harvester having excellent power generation performance and a manufacturing method thereof are provided. The magnetoelectric energy harvester includes a magnetostrictive material portion including a magnetostrictive material which generates a mechanical deformation when being magnetized. The magnetoelectric energy harvester also includes a piezoelectric material portion which has a bending vibration mode and includes a piezoelectric material which produces power by receiving a mechanical deformation force from the magnetostrictive material portion.

Magnetoelectric energy harvester and manufacturing method thereof

A piezoelectric generator for power supply of a portable terminal is provided. The piezoelectric generator includes: a portable terminal case which has a battery mounting part formed on one surface thereof and has parts of the portable terminal mounted therein; a slide part which is formed on opposite side surfaces of a border of the portable terminal case to be able to slide up and down; and a piezoelectric body which has one end or opposite ends connected with the slide part and is disposed in the battery mounting part in a transverse direction, and which vibrates by a sliding movement of the slide part.

Piezoelectric generator for supplying power to portable terminal

The present invention relates to a high-concentration oxygen-dissolving apparatus using ultrasonic waves. More particularly, the present invention relates to a high-concentration oxygen-dissolving apparatus using ultrasonic waves in which, when liquid is introduced via an inlet port, a sediment filter filters out foreign substances, a pre-carbon filter filters out harmful chemical substances, a UF membrane filter filters out impurities, a post-carbon filter filters out gas components and odorous components, the filtered liquid is stored in a storage tank, the liquid stored in the storage tank passes through a cooling device to be cooled to a low temperature, the liquid compressed to high pressure by means of a high pressure pump and a Venturi tube is introduced into an ultrasonic wave irradiating unit, oxygen is dissolved into the liquid by ultrasonic waves irradiated from the ultrasonic wave irradiating unit, the liquid flows to the storage tank through a flow pipe, and the liquid having an oxygen concentration higher than a predetermined level is discharged through an outlet pipe.

High-concentration oxygen-dissolving apparatus using ultrasonic waves

A piezoelectric power generator for feeding emergency power, includes a frame; a fixing unit comprising a left fixing body coupled to an upper left side of the frame and a right fixing body coupled to an upper right part of the frame; a first piezoelectric body bonded to a right side of the left fixing body; a second piezoelectric body bonded to a left side of the right fixing body; and a vibration unit bonded between the first piezoelectric body and the second piezoelectric body and vibrating vertically.

Growing community of inventors

Seoul, South Korea

Hyung Won Kang