Development of metal-bonded Langevin transducer using LiNbO<sub>3</sub>

Itô, Hiroshi; Jimbo, Hikaru; Shiotani, Koichi; Sakai, Nagahide

doi:10.7567/jjap.55.07kc04

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…The transducer is composed of a half-wavelength straight horn and a bolt-clamped Langevin transducer. 24) The horn is clamped at its node to the wall and has a circular radiation surface of 50 mm diameter. The center of the transducer is 65 mm below the water surface and 110 mm above the bottom.…”

Section: Measurement Setupmentioning

confidence: 99%

Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements

Zeng¹,

Mizuno²,

Nakamura³

2017

Jpn. J. Appl. Phys.

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The sound intensity vector provides useful information on the state of an ultrasonic field in water, since sound intensity is a vector quantity expressing the direction and magnitude of the sound field. In the previous studies on sound intensity measurement in water, conventional piezoelectric sensors and metal cables were used, and the transmission distance was limited. A new configuration of a sound intensity probe suitable for ultrasonic measurement in water is proposed and constructed for trial in this study. The probe consists of light-emitting diodes and piezoelectric elements, and the output signals are transmitted through fiber optic cables as intensity-modulated light. Sound intensity measurements of a 26 kHz ultrasonic field in water are demonstrated. The difference in the intensity vector state between the water tank with and without sound-absorbing material on its walls was successfully observed.

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Section: Measurement Setupmentioning

confidence: 99%

Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements

Zeng¹,

Mizuno²,

Nakamura³

2017

Jpn. J. Appl. Phys.

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“…29,30) A typical transducer using preload application is the bolt-clamped Langevin type transducer. [31][32][33] The transducer uses bolts and some metal plates to clamp the piezoelectric element. When a bolt is clamped, preload is applied to the piezoelectric element at the optimum torque using a torque wrench.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of transducer for cryogenic actuators by equivalent circuit model

Kubo,

Yagi,

Kanda

et al. 2024

Jpn. J. Appl. Phys.

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Cryogenic environments are increasingly used in scientific and industrial fields. Recently, cryogenic environments are also used for storage and supply of liquid hydrogen, which is considered essential for the realization of a decarbonized society. Actuators to drive a valve that controls such a low-temperature fluid are required. In this study, a piezoelectric transducer that can be driven in the cryogenic environment has been fabricated and evaluated. Although the performance of piezoelectric elements degrades at cryogenic temperatures in general, the application of a preload can suppress the degradation of performance. Equivalent circuits were used for evaluation, and force factors and figures of merit were compared. As a result, the force factor was as high as that at room temperature even at cryogenic temperatures, and a high figure of merit was obtained. The result indicates that the transducer can be used for the driving of micro actuator at cryogenic temperature.

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High‐Performance and Environmentally‐Friendly Bulk‐Wave‐Acoustofluidic Devices Driven by Lead‐Free Piezoelectric Materials

Qiu

2024

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Bulk‐wave‐acoustofluidic devices provide strong acoustic fields and high device efficiency, thereby offering high‐throughput capability when processing biological samples. Such devices are typically driven by lead zirconate titanate (PZT) transducers, which contain a high content of lead, inevitably resulting in environmental and biocompatibility issues. Replacing PZT with lead‐free piezoelectric materials in various ultrasonic devices is considered challenging mainly due to the inferior piezoelectric properties lead‐free materials possess compared to those of PZT. In this study, through both experiments and numerical simulations, it is demonstrated that the performance of the bulk‐wave‐acoustofluidic devices driven by (Bi,Na)TiO3‐BaTiO3‐(Bi,Na)(Mn,Nb)O3 (BNT‐BT‐BNMN) can match that of PZT‐driven devices at low power and is superior at intermediate power. It is found that the low acoustic impedance and the weak transverse mode in BNT‐BT‐BNMN compensate for the inferior piezoelectric properties at low power. The fact that the BNT‐BT‐BNMN devices outperform at intermediate power is consistent with the superior performance of the Mn‐doped BNT‐based piezoelectric materials compared to PZT at high power. Perfect focusing on 5‐‐diameter polystyrene particles at a flow rate of up to 10 mL min−1 is achieved using the BNT‐BT‐BNMN device at input power of 1 W.

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Development of metal-bonded Langevin transducer using LiNbO₃

Cited by 4 publications

References 15 publications

Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements

Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements

Evaluation of transducer for cryogenic actuators by equivalent circuit model

High‐Performance and Environmentally‐Friendly Bulk‐Wave‐Acoustofluidic Devices Driven by Lead‐Free Piezoelectric Materials

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Development of metal-bonded Langevin transducer using LiNbO3

Cited by 4 publications

References 15 publications

Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements

Sound intensity probe for ultrasonic field in water using light-emitting diodes and piezoelectric elements

Evaluation of transducer for cryogenic actuators by equivalent circuit model

High‐Performance and Environmentally‐Friendly Bulk‐Wave‐Acoustofluidic Devices Driven by Lead‐Free Piezoelectric Materials

Contact Info

Product

Resources

About

Development of metal-bonded Langevin transducer using LiNbO₃