Design and fabrication of high frequency BNT film based linear array transducer

Liu, Hongwei; Ren, Wei; Zhao, Jinyan; Zhao, Huifeng; Wu, Xiaoqing; Shi, Peng; Zhou, Qifa; Shung, K. Kirk

doi:10.1016/j.ceramint.2015.03.256

Cited by 11 publications

(5 citation statements)

References 27 publications

(18 reference statements)

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“…We investigated the effects of other factors, i.e., oxygen vacancies, , ferroelectric polarization, and the piezopotential of bismuth sodium titanate (BNT), on H 2 production and methylene blue (MB, 20 mg L –1 ) degradation in this study. Ferroelectric materials that do not contain lead have been extensively studied and used in ultrasonic transducers and resonators. , Because of the A-site cation substitution in the perovskite structure, BNT has the unusual property of maintaining its energetically stable structure and composition. BNT differs from other relaxor ferroelectric materials in that it has cations with different valencies at its A sites, sodium and bismuth.…”

Section: Introductionmentioning

confidence: 99%

“…Ferroelectric materials that do not contain lead have been extensively studied and used in ultrasonic transducers and resonators. 33,34 Because of the A-site cation substitution in the perovskite structure, BNT has the unusual property of maintaining its energetically stable structure and composition. BNT differs from other relaxor ferroelectric materials in that it has cations with different valencies at its A sites, sodium and bismuth.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Piezocatalytic Activity in Bi_1/2Na_1/2TiO₃ for Water Splitting by Oxygen Vacancy Engineering

Ranjan

Hsiao

Lin

et al. 2022

ACS Appl. Mater. Interfaces

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Piezoelectric materials have demonstrated applicability in clean energy production and environmental wastewater remediation through their ability to initiate a number of catalytic reactions. In this study, we used a conventional sol–gel method to synthesize lead-free rhombohedral R3c bismuth sodium titanate (BNT) particles of various sizes. When used as a piezocatalyst to generate H2 through water splitting, the BNT samples provided high production rates (up to 506.70 μmol g–1 h–1). These piezocatalysts also degraded the organic pollutant methylene blue (MB, 20 mg L–1) with high efficiency (up to k = 0.039 min–1), suggesting their potential to treat polluted water. Finally, we found that the piezopotential caused band tilting in the semiconductor and aided charge transfer such that recombination was suppressed and the rate of H2 production increased. The mechanism of piezoelectric catalysis involved oxygen vacancies, the size of the catalyst, and the internal electric field playing important roles to enhance electron–hole separation, which further enhanced the catalysis reactions.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Enhanced Piezocatalytic Activity in Bi_1/2Na_1/2TiO₃ for Water Splitting by Oxygen Vacancy Engineering

Ranjan

Hsiao

Lin

et al. 2022

ACS Appl. Mater. Interfaces

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show abstract

“…Then, the design of the UT can be conducted based on ECM. In this study, the design parameters of the UT are the thicknesses of the piezoelectric and matching layers, and the performance parameters include center frequency (CF) and bandwidth (BW), which can be calculated as [ 36 ]

where

and

represent the lower and upper frequencies at which the amplitude drops to the −6 dB peak.…”

Section: Optimization Design Methods For Ultrasonic Transducermentioning

confidence: 99%

Particle Swarm Optimization Algorithm-Based Design Method for Ultrasonic Transducers

et al. 2020

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In order to improve the fabrication efficiency and performance of an ultrasonic transducer (UT), a particle swarm optimization (PSO) algorithm-based design method was established and combined with an electrically equivalent circuit model. The relationship between the design and performance parameters of the UT is described by an electrically equivalent circuit model. Optimality criteria were established according to the desired performance; then, the design parameters were iteratively optimized using a PSO algorithm. The Pb(ZrxTi1−x)O3 (PZT) ceramic UT was designed by the proposed method to verify its effectiveness. A center frequency of 6 MHz and a bandwidth of −6 dB (70%) were the desired performance characteristics. The optimized thicknesses of the piezoelectric and matching layers were 255 μm and 102 μm. The experimental results agree with those determined by the equivalent circuit model, and the center frequency and −6 dB bandwidth of the fabricated UT were 6.3 MHz and 68.25%, respectively, which verifies the effectiveness of the developed optimization design method.

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“…Fei et al fabricated Co-doped NBT (NBT-Co) piezoelectric ceramics to improve the piezoelectric properties of NBT ceramics and designed a

0.7 0.7

mm needle ultrasound transducer with a center frequency of 72.7 MHz (-6 dB bandwidth: 52.7%) and

-number close to 1 [ 48 ]. Liu et al fabricated a

216

array 82.84 MHz (-6 dB bandwidth: 46.77%) millimeter transducer using an NBT-based thick film [ 71 ].…”

Section: Ultrasound Transducer Design and Fabricationmentioning

confidence: 99%

Recent Advancements in Ultrasound Transducer: From Material Strategies to Biomedical Applications

Zhang

et al. 2022

BME Front

Self Cite

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Ultrasound is extensively studied for biomedical engineering applications. As the core part of the ultrasonic system, the ultrasound transducer plays a significant role. For the purpose of meeting the requirement of precision medicine, the main challenge for the development of ultrasound transducer is to further enhance its performance. In this article, an overview of recent developments in ultrasound transducer technologies that use a variety of material strategies and device designs based on both the piezoelectric and photoacoustic mechanisms is provided. Practical applications are also presented, including ultrasound imaging, ultrasound therapy, particle/cell manipulation, drug delivery, and nerve stimulation. Finally, perspectives and opportunities are also highlighted.

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Design and fabrication of high frequency BNT film based linear array transducer

Cited by 11 publications

References 27 publications

Enhanced Piezocatalytic Activity in Bi_1/2Na_1/2TiO₃ for Water Splitting by Oxygen Vacancy Engineering

Enhanced Piezocatalytic Activity in Bi_1/2Na_1/2TiO₃ for Water Splitting by Oxygen Vacancy Engineering

Particle Swarm Optimization Algorithm-Based Design Method for Ultrasonic Transducers

Recent Advancements in Ultrasound Transducer: From Material Strategies to Biomedical Applications

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Design and fabrication of high frequency BNT film based linear array transducer

Cited by 11 publications

References 27 publications

Enhanced Piezocatalytic Activity in Bi1/2Na1/2TiO3 for Water Splitting by Oxygen Vacancy Engineering

Enhanced Piezocatalytic Activity in Bi1/2Na1/2TiO3 for Water Splitting by Oxygen Vacancy Engineering

Particle Swarm Optimization Algorithm-Based Design Method for Ultrasonic Transducers

Recent Advancements in Ultrasound Transducer: From Material Strategies to Biomedical Applications

Contact Info

Product

Resources

About

Enhanced Piezocatalytic Activity in Bi_1/2Na_1/2TiO₃ for Water Splitting by Oxygen Vacancy Engineering

Enhanced Piezocatalytic Activity in Bi_1/2Na_1/2TiO₃ for Water Splitting by Oxygen Vacancy Engineering