Abstract: An ultrasonic probe includes: a piezoelectric element; and a backing material including a matrix resin and thermally conductive particles, arranged on one direction side with respect to the piezoelectric element, wherein a ratio of thermal conductivity of the backing material in a thickness direction to the thermal conductivity of the backing material in a horizontal direction is 3 or more.

Abstract: An acoustic lens of an ultrasound probe includes: a concave lens portion and a convex lens portion that are joined to each other. A propagation speed of an ultrasonic wave in the convex lens portion is slower than a propagation speed of an ultrasonic wave in the concave lens portion. An acoustic impedance of a lens portion on a side of a subject of the concave lens portion and the convex lens portion is within a range of 1.3 to 1.8 MRayl. A material of the concave lens portion is a thermoplastic resin, and a material of the convex lens portion is a thermoplastic resin.

Abstract: An ultrasound probe of the present invention has a piezoelectric element and a backing material disposed on one direction side with respect to the piezoelectric element, the backing material containing heat conductive particles. The backing material has a heat conductivity of 2.0 W/mk or more, and the content of the heat conductive particles is less than 30 vol % based on the total volume of the backing material.

Abstract: An ultrasonic transducer includes: a laminate in which a plurality of acoustic members is laminated; and an adhesive layer that includes a silane coupling agent and an adhesive, the adhesive layer joining any two of the plurality of acoustic members to each other, wherein the silane coupling agent has a structure represented by general formula (1): wherein R1s each independently represent a methoxy group or an ethoxy group, R2 represents a methoxy group, an ethoxy group, or a hydrogen atom, X represents a linear or branched organic chain having 4 or more continuous carbon atoms, and A represents a reactive functional group.

Abstract: The present invention provides a resin composition used for producing an acoustic member, the resin composition comprising: a thermosetting resin; and two or more types of particles dispersed in the thermosetting resin, the two or more types of particles comprising: heavy particles that have a higher density than the thermosetting resin and are particles other than metal particles; and light particles that have a lower density than the thermosetting resin, and the total content of the heavy particles and the light particles relative to the entire volume of a cured product of the resin composition being 10 vol % or more.

Abstract: An ultrasonic probe includes: a piezoelectric element; and a backing material including a matrix resin and thermally conductive particles, arranged on one direction side with respect to the piezoelectric element, wherein a ratio of thermal conductivity of the backing material in a thickness direction to the thermal conductivity of the backing material in a horizontal direction is 3 or more.

Abstract: An ultrasound probe of the present invention has a piezoelectric element and a backing material disposed on one direction side with respect to the piezoelectric element, the backing material containing heat conductive particles. The backing material has a heat conductivity of 2.0 W/mk or more, and the content of the heat conductive particles is less than 30 vol % based on the total volume of the backing material.

Abstract: The piezoelectric element includes a piezoelectric composite including a plurality of piezoelectrics and a reaction product, and an electrode pair. The plurality of piezoelectrics is disposed in alignment at an interval of 1 to 10 ?m. The aspect ratio of each of the piezoelectrics is 5 or higher. The reaction product is a reaction product of a crosslinkable epoxy resin composition containing an elastomer component, a crosslinkable epoxy resin, and a crosslinking agent. One or each of a number of epoxy groups per molecule of the crosslinkable epoxy resin and a crosslinking value of the crosslinking agent is 3 or more.

Abstract: An acoustic lens contains silicone rubber and metal oxide particles. The metal oxide particles are added into the silicone rubber. The metal oxide particles have a number-average particle diameter of 30 to 2,000 nm, a specific gravity of 3.5 g/cm3 or more, a content of 30 to 150 parts by mass based on 100 parts by mass of the silicone rubber, and an oil absorption amount of 20 mL or less per 100 g.

Abstract: An acoustic lens for an ultrasonic probe includes a vulcanization-molded article of a rubber composition including a first silicone rubber composition having a plasticity number of 100 or less, and a second silicone rubber composition having a plasticity number of 150 or more and 300 or less.

Abstract: The piezoelectric element includes a piezoelectric composite including a plurality of piezoelectrics and a reaction product, and an electrode pair. The plurality of piezoelectrics is disposed in alignment at an interval of 1 to 10 ?m. The aspect ratio of each of the piezoelectrics is 5 or higher. The reaction product is a reaction product of a crosslinkable epoxy resin composition containing an elastomer component, a crosslinkable epoxy resin, and a crosslinking agent. One or each of a number of epoxy groups per molecule of the crosslinkable epoxy resin and a crosslinking value of the crosslinking agent is 3 or more.

Abstract: An acoustic lens for an ultrasonic probe includes a vulcanization-molded article of a rubber composition including a first silicone rubber composition having a plasticity number of 100 or less, and a second silicone rubber composition having a plasticity number of 150 or more and 300 or less.

Abstract: An acoustic lens contains silicone rubber and metal oxide particles. The metal oxide particles are added into the silicone rubber. The metal oxide particles have a number-average particle diameter of 30 to 2,000 nm, a specific gravity of 3.5 g/cm3 or more, a content of 30 to 150 parts by mass based on 100 parts by mass of the silicone rubber, and an oil absorption amount of 20 mL or less per 100 g.

Abstract: In a laminated piezoelectric body, a laminated piezoelectric body manufacturing method, an ultrasound transducer, and an ultrasound diagnostic device according to the present invention, a plurality of mutually laminated piezoelectric bodies are electrically connected in parallel to each other, and each of the plurality of piezoelectric bodies arranges an orientation of residual polarization or a crystal axis that is related to an electrical displacement or a sign of an electric field due to a direct piezoelectric effect in a direction which reduces sensitivity in a first resonance mode and increases sensitivity in a second resonance mode of a higher order than the first resonance mode with respect to an axis of a first-level piezoelectric body on a fixed end-side.

Abstract: Provided is an organic piezoelectric material which has excellent piezoelectric property, heat resistance property in particular. An ultrasonic oscillator, which is to be used for an ultrasonic medical diagnostic imaging device which can receive high frequencies at high sensitivity and is suitable for harmonic imaging techniques, a method for manufacturing such oscillator, and an ultrasonic probe are also provided. The ultrasonic medical diagnostic imaging device is provided by sing such oscillator, method and probe. The organic piezoelectric material is characterized by containing empty particles having an average particle diameter of 10 ?m or less.

Abstract: A method for manufacturing an ultrasound probe which includes a piezoelectric element for transmitting and receiving ultrasound waves and an acoustic matching layer provided by lamination of two or more matching materials on a front surface of the piezoelectric element, the method including forming at least one of the two or more matching materials from a thermosetting resin and a filler for adjusting an acoustic impedance; and bonding the two or more matching materials with an adhesive having a viscosity of 10 Pa·s or less at 25° C.

Abstract: In a laminated piezoelectric body, a laminated piezoelectric body manufacturing method, an ultrasound transducer, and an ultrasound diagnostic device according to the present invention, a plurality of mutually laminated piezoelectric bodies are electrically connected in parallel to each other, and each of the plurality of piezoelectric bodies arranges an orientation of residual polarization or a crystal axis that is related to an electrical displacement or a sign of an electric field due to a direct piezoelectric effect in a direction which reduces sensitivity in a first resonance mode and increases sensitivity in a second resonance mode of a higher order than the first resonance mode with respect to an axis of a first-level piezoelectric body on a fixed end-side.

Abstract: Disclosed is an organic piezoelectric material film which has little contaminants and has excellent piezoelectric properties. The organic piezoelectric material film is produced by casting a solution of an organic piezoelectric material in an organic solvent and subsequently drying the resulting product. The organic piezoelectric material film has a moisture content of 0.1 mass % or less.

Abstract: Disclosed is an organic piezoelectric material film which has little contaminants and has excellent piezoelectric properties. The organic piezoelectric material film is produced by a solution casting process using, as raw materials, a raw material for an organic piezoelectric material and a crushed product which is produced by crushing a material produced by a solution casting process and is mainly composed of an organic piezoelectric material.

Abstract: Provided is an organic piezoelectric material which has excellent piezoelectric property, heat resistance property in particular. An ultrasonic oscillator, which is to be used for an ultrasonic medical diagnostic imaging device which can receive high frequencies at high sensitivity and is suitable for harmonic imaging techniques, a method for manufacturing such oscillator, and an ultrasonic probe are also provided. The ultrasonic medical diagnostic imaging device is provided by sing such oscillator, method and probe. The organic piezoelectric material is characterized by containing empty particles having an average particle diameter of 10 ?m or less.