Micromachining of High Quality PMN–31%PT Single Crystals for High-Frequency (&gt;20 MHz) Ultrasonic Array Transducer Applications

Lei, Zhihong; Chen, Yan; Xu, Guisheng; Liu, Jinfeng; Yuan, Maodan; Zeng, Lvming; Ji, Xuanrong; Wu, Dawei

doi:10.3390/mi11050512

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…We have found similar patterns in several experiments, and our previous studies have shown similar results [ 28 , 29 ]. In addition, some related research reports are also consistent with our results [ 32 , 33 , 34 , 35 ].…”

Section: Resultssupporting

confidence: 93%

Increasing Performances of 1–3 Piezocomposite Ultrasonic Transducer by Alternating Current Poling Method

Zhu

Liu

et al. 2022

Micromachines

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Ultrasonic transducers are the basic core component of diagnostic imaging devices, wherein the piezoelectric materials are the active element of transducers. Recent studies showed that the alternating current poling (ACP) method could develop the properties of piezocomposites, which had great potential to improve transducer performance. Herein, transducers (fc = 3 MHz) made of DCP and ACP 1–3 piezocomposites (prepared by PZT-5H ceramics and PMN-PT single crystals) were fabricated. The effect of the ACP method on the bandwidth and insertion loss (sensitivity) was explored. The results indicate that the ACP method can significantly enhance the bandwidth and slightly increase the insertion loss of transducers. Particularly, a superhigh bandwidth of 142.8% was achieved in the transducer of ACP 1–3 PMN-PT single crystal combined with suitable matching and backing layers. This bandwidth is higher than that of all reported transducers with similar center frequency. Moreover, the optimization mechanism of transducer performance by the ACP method was discussed. The obtained results suggested that the ACP is an effective and convenient technology to improve transducer performances, especially for the bandwidth.

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Section: Resultssupporting

confidence: 93%

Increasing Performances of 1–3 Piezocomposite Ultrasonic Transducer by Alternating Current Poling Method

Zhu

Liu

et al. 2022

Micromachines

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“…A variety of piezoelectric materials, including piezoelectric ceramics [13,14], ferroelectric polymers [15], and ferroelectrets [16], have been adopted in energy harvesting. Among them, the ferroelectret is a relatively new one that was first used in energy harvesters in 2012 [17].…”

Section: Introductionmentioning

confidence: 99%

Fluorinated Polyethylene Propylene Ferroelectrets with an Air-Filled Concentric Tunnel Structure: Preparation, Characterization, and Application in Energy Harvesting

et al. 2020

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Fluorinated polyethylene propylene (FEP) bipolar ferroelectret films with a specifically designed concentric tunnel structure were prepared by means of rigid-template based thermoplastic molding and contact polarization. The properties of the fabricated films, including the piezoelectric response, mechanical property, and thermal stability, were characterized, and two kinds of energy harvesters based on such ferroelectret films, working in 33- and 31-modes respectively, were investigated. The results show that the FEP films exhibit significant longitudinal and radial piezoelectric activities, as well as superior thermal stability. A quasi-static piezoelectric d33 coefficient of up to 5300 pC/N was achieved for the FEP films, and a radial piezoelectric sensitivity of 40,000 pC/N was obtained in a circular film sample with a diameter of 30 mm. Such films were thermally stable at 120 °C after a reduction of 35%. Two types of vibrational energy harvesters working in 33-mode and 31-mode were subsequently designed. The results show that a power output of up to 1 mW was achieved in an energy harvester working in 33-mode at a resonance frequency of 210 Hz, referring to a seismic mass of 33.4 g and an acceleration of 1 g (g is the gravity of the earth). For a device working in 31-mode, a power output of 15 μW was obtained at a relatively low resonance frequency of 26 Hz and a light seismic mass of 1.9 g. Therefore, such concentric tunnel FEP ferroelectric films provide flexible options for designing vibrational energy harvesters working either in 33-mode or 31-mode to adapt to application environments.

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Ductile mode machining of piezoelectric single crystal by laser-assisted diamond turning process

Sim,

Seo,

Gwak

et al. 2024

Journal of Materials Research and Technology

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Micromachining of High Quality PMN–31%PT Single Crystals for High-Frequency (>20 MHz) Ultrasonic Array Transducer Applications

Cited by 6 publications

References 38 publications

Increasing Performances of 1–3 Piezocomposite Ultrasonic Transducer by Alternating Current Poling Method

Increasing Performances of 1–3 Piezocomposite Ultrasonic Transducer by Alternating Current Poling Method

Fluorinated Polyethylene Propylene Ferroelectrets with an Air-Filled Concentric Tunnel Structure: Preparation, Characterization, and Application in Energy Harvesting

Ductile mode machining of piezoelectric single crystal by laser-assisted diamond turning process

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