An ultrasound vibration device is provided with a stacked transducer in which a plurality of piezoelectric single crystal element layers are stacked between two metal blocks. Since each of the two metal blocks and the plurality of piezoelectric single crystal element layers is fusion-bonded relative to a stack direction by bonding metal having a melting point corresponding to half a Curie point of the plurality of piezoelectric single crystal element layers or below, it is possible to use non-lead material, reduce a processing cost and realize inexpensiveness.

An ultrasonic horn includes: a vertical vibration generating portion in which a first ultrasonic vibrator is mounted inside; a horn portion extending forward from the vertical vibration generating portion , amplifying an ultrasonic vibration generated by the vertical vibration generating portion , and to which a capillary is mounted at a front end portion ; and a torsional vibration generating portion extending rearward from the vertical vibration generating portion . The torsional vibration generating portion includes: a rod-shaped body ; vibration members arranged axisymmetrically around a central axis ; second ultrasonic vibrators sandwiched between the rod-shaped body and the vibration members such that a vibration direction is a circumferential direction; and bolts pressurizing the second ultrasonic vibrators.

The present disclosure relates to a device for sonicating a biological sample. In one embodiment, a sample tube holder is pivotally suspended in a mount of a sonication device, thus allowing for a rotational degree of freedom and/or lateral movement that provides an optimized contact area between the sonotrode and the sample tube. Also disclosed is a method for sonicating a biological sample using the device described herein.

A PZT transducer-horn integrated ultrasonic driving structure consists of a nut, a bolt, a left PZT circular stack, a flange, a right PZT truncated stack and a horn. The horn, the right PZT truncated stack, the flange and the left PZT circular stack are arranged in sequence and connected via the bolt and then fastened via the nut; the right PZT transducer is a truncated cone-shaped stack formed by PZT circular plates; and the right PZT transducer and the horn are integrated to form the ultrasonic driving structure. Considering the dimension of PZT on two sides of the flange and the horn meet the requirements for ultrasonic vibration node and antinode, the dimension of round contour of the circular PZT stack and flange is reduced to increase the thickness of the truncated PZT stack and flange. With the integrated structure, the effect of reducing the contour dimension of the ultrasonic driving surgical device can be obtained, and the outer diameter is reduced to the range of 8-10 mm as compared with the range of 12-15 mm in the prior art, thereby further meeting the application requirements.

A method for calibrating a wire clamp device includes: preparing a wire clamp device provided with a pair of arm parts having tips for clamping a wire, the arms extending from the tips toward base ends, and a drive part provided with a piezoelectric element for drive, connected to the base ends of the pair of arm parts and opening/closing the tips of the pair of arm parts; a step of detecting, by electrical continuity between the tips, a timing at which the pair of arm parts enters a closed state when the piezoelectric element for drive is driven, and acquiring a reference voltage; and a step of calibrating, on the basis of the reference voltage, an application voltage to be applied to the piezoelectric element for drive. Thus, it is possible to perform accurate and stable wire bonding.

The invention relates to an ultrasonic oscillating unit that comprises a cylindrical base body having a center axis and a jacket surface into which a plurality of slits are introduced that extend obliquely to the center axis in a side view of the jacket surface.

A device for generating mechanical oscillations is provided. The device has a first mass, a second mass, and a piezoelectric excitation system mechanically coupling the first mass and the second mass to one another, with the piezoelectric excitation system having a stiffness. The piezoelectric excitation system is designed such that its stiffness is settable.

An electrolytic water softener which comprises a container, at least one cathode and at least one anode extending into the container, a power supply operatively connected to the cathode and anode, a vibrating device to vibrate the cathode, and a system for collecting material released from the cathode after operation of the vibration device.

An ultrasonic transducer includes a stack of flat electrodes between which are interposed ceramic wafers of substantially same surface area as the electrodes, stacked contours of the ceramic wafers and electrode wafers defining substantially flat or cylindrical side faces of the stack. A method of manufacturing the transducer includes: alternatively stacking a ceramic wafer and an electrode wafer, placing between each ceramic wafer and its two neighboring electrodes a composition of which at least 75% by weight, or at least 80% by weight, that includes silver nanoparticles having a grain size of smaller than or equal to 80 nanometers, or smaller than or equal to 60 nanometers; and compressing the stack by heating to a temperature of less than or equal to 280° C., or between 200° C. and 250° C.

The present invention provides a piezoelectric material not containing lead and potassium, having a high relative density, a high Curie temperature, and a high mechanical quality factor, and exhibiting good piezoelectricity. The piezoelectric material contains 0.04 percent by mole or more and 2.00 percent by mole or less of Cu relative to 1 mol of metal oxide represented by General formula (1) below.
((Na.sub.1-zLi.sub.z).sub.xBa.sub.1-y)(Nb.sub.yTi.sub.1-y)O.sub.3 (in Formula, 0.70≦x≦0.99, 0.75≦y≦0.99, and 0<z<0.15, and x<y)  General formula (1)