Single element and linear array PZT ultrasound biomicroscopy transducers

Lukacs, Marc; Sayer, M.; Foster, Stuart

doi:10.1109/ultsym.1997.663340

Cited by 12 publications

(5 citation statements)

References 7 publications

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“…Lukacs et al [133] demonstrated that single element high frequency transducers could be fabricated with a composite sol–gel PZT film. The center frequency of the transducer is in range of 70–160 MHz, with −6 dB bandwidth of 16–52%.…”

Section: Piezoelectric High Frequency Films Devicesmentioning

confidence: 99%

Piezoelectric films for high frequency ultrasonic transducers in biomedical applications

Zhou

Lau

et al. 2011

Progress in Materials Science

313

205

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Piezoelectric films have recently attracted considerable attention in the development of various sensor and actuator devices such as nonvolatile memories, tunable microwave circuits and ultrasound transducers. In this paper, an overview of the state of art in piezoelectric films for high frequency transducer applications is presented. Firstly, the basic principles of piezoelectric materials and design considerations for ultrasound transducers will be introduced. Following the review, the current status of the piezoelectric films and recent progress in the development of high frequency ultrasonic transducers will be discussed. Then details for preparation and structure of the materials derived from piezoelectric thick film technologies will be described. Both chemical and physical methods are included in the discussion, namely, the sol–gel approach, aerosol technology and hydrothermal method. The electric and piezoelectric properties of the piezoelectric films, which are very important for transducer applications, such as permittivity and electromechanical coupling factor, are also addressed. Finally, the recent developments in the high frequency transducers and arrays with piezoelectric ZnO and PZT thick film using MEMS technology are presented. In addition, current problems and further direction of the piezoelectric films for very high frequency ultrasound application (up to GHz) are also discussed.

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Section: Piezoelectric High Frequency Films Devicesmentioning

confidence: 99%

Piezoelectric films for high frequency ultrasonic transducers in biomedical applications

Zhou

Lau

et al. 2011

Progress in Materials Science

313

205

View full text Add to dashboard Cite

show abstract

“…Lukacs et al [4] demonstrated that single element transducers could be fabricated from PZT thick film. They used a modified sol-gel PZT composite to fabricate high frequency ultrasound transducers from 70 to 160 MHz, but the bandwidths of the transducers were low (from 52% to 16% at À6 dB).…”

Section: Introductionmentioning

confidence: 99%

High frequency broadband PZT thick film ultrasonic transducers for medical imaging applications

et al. 2006

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“…One of the common lead-based composites used in ultrasonic sensors is PZT/PZT, which has a wide range of center frequency from 17 to 160 MHz and a −6 dB bandwidth ranging from 14 to 37.5 MHz. PZT/PZT has been fabricated on various substrates including steel and aluminum [ 58 , 59 , 60 ]. BiT (Bismuth Titanate) has a high curie temperature of 675 °C and has been applied in a BiT/ PZT composite.…”

Section: High-temperature Ultrasonic Transducers (Htut) By Sol-gel Techniquementioning

confidence: 99%

Ultrasound Sensors for Process Monitoring in Injection Moulding

Kariminejad

Tormey

Huq

et al. 2021

Sensors

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Injection moulding is an extremely important industrial process, being one of the most commonly-used plastic formation techniques. However, the industry faces many current challenges associated with demands for greater product customisation, higher precision and, most urgently, a shift towards more sustainable materials and processing. Accurate real-time sensing of the material and part properties during processing is key to achieving rapid process optimisation and set-up, reducing down-times, and reducing waste material and energy in the production of defective products. While most commercial processes rely on point measurements of pressure and temperature, ultrasound transducers represent a non-invasive and non-destructive source of rich information on the mould, the cavity and the polymer melt, and its morphology, which affect critical quality parameters such as shrinkage and warpage. In this paper the relationship between polymer properties and the propagation of ultrasonic waves is described and the application of ultrasound measurements in injection moulding is evaluated. The principles and operation of both conventional and high temperature ultrasound transducers (HTUTs) are reviewed together with their impact on improving the efficiency of the injection moulding process. The benefits and challenges associated with the recent development of sol-gel methods for HTUT fabrication are described together with a synopsis of further research and development needed to ensure a greater industrial uptake of ultrasonic sensing in injection moulding.

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Single element and linear array PZT ultrasound biomicroscopy transducers

Cited by 12 publications

References 7 publications

Piezoelectric films for high frequency ultrasonic transducers in biomedical applications

Piezoelectric films for high frequency ultrasonic transducers in biomedical applications

High frequency broadband PZT thick film ultrasonic transducers for medical imaging applications

Ultrasound Sensors for Process Monitoring in Injection Moulding

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