Metal-Polymer Composite as an Acoustic Attenuating Material for Ultrasonic Transducers

Hidayat, Darmawan; Syafei, Nendi Suhendi; Wibawa, Bambang Mukti; Taufik, Mohammad; Bahtiar, Ayi; Risdiana, Risdiana

doi:10.4028/www.scientific.net/kem.860.303

Cited by 8 publications

(3 citation statements)

References 10 publications

(10 reference statements)

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“…Measuring turbine steam exhaust wetness (Zhu et al, 2023), particle size distribution of carbonyl iron powder (Wei et al, 2023), determine the material level, thickness, and temperature of carbon steel materials (Tai et al, 2023), measuring the surface roughness of materials (H. Liu et al, 2023), material measurement aluminum alloy 2219-O (S. Li et al, 2023), cavity content and density of polyester filaments (K. Liu et al, 2017), testing the porosity of composite laminates (Z. Li et al, 2014), detect Escherichia coli bacteria (Ravinder Reddy et al, 2001), metal-polymer composites (Hidayat et al, 2020) and detect contamination in the material (Bhagaspati et al, 2021;Khairurrahman et al, 2021;Salsabila et al, 2021).…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

The Relationship of Lignin and Crude Fiber in Rice Bran with Ultrasonic Wave Parameters

Rosani,

Hernaman,

Hidayat

et al. 2024

AAVS

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This study was designed to determine the ability of ultrasonic waves to detect rice husks added to rice bran based on physical properties associated with nutrient content. This research utilizes low-intensity ultrasonic waves of 50 kHz transmitted on rice bran mixed with rice husks with particle sizes passing 30 mesh (<0.595 mm). The purpose of this study was to determine the correlation between ultrasonic parameters (attenuation and velocity) and the nutrient content (crude fiber and lignin) of rice bran containing different rice husks. Based on the results of research, there is a strong relationship between ultrasonic parameters and the nutrient content of rice bran containing various rice husks. The positive correlation between attenuation with crude fibre is 0.975, and attenuation with lignin is 0.965. The attenuation coefficient can be used as a parameter for estimating the content of lignin and crude fibre in rice bran. This research proves the high nutritional value of rice bran can be detected with ultrasonic waves. These results still need further research to measure the factors that affect ultrasonic wave transmission (amplitude) when measuring samples, as well as the manufacture of a series of compact ultrasonic test systems so that they can be applied in industry or practically in the field.

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Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

The Relationship of Lignin and Crude Fiber in Rice Bran with Ultrasonic Wave Parameters

Rosani,

Hernaman,

Hidayat

et al. 2024

AAVS

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“…In such structures, the critical element is usually the backing, the thickness of which in particular can negatively impact its ability to attenuate ultrasonic waves. Several polymers loaded with metallic particles have found use as backing, and their acoustic impedances have been adjusted according to the type of particles and their volume fraction [ 6 , 7 , 8 , 9 , 10 ]. However, these composites often suffer from insufficient acoustic attenuation due to the limited thickness of the backing layer, thus precluding the minimization of this element for the design of high-frequency ultrasonic transducers.…”

Section: Introductionmentioning

confidence: 99%

High Acoustic Impedance and Attenuation Backing for High-Frequency Focused P(VDF-TrFE)-Based Transducers

Siewe

Callé

Meulen

et al. 2023

Sensors

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Backing materials with tailored acoustic properties are beneficial for miniaturized ultrasonic transducer design. Whereas piezoelectric P(VDF-TrFE) films are common elements in high-frequency (>20 MHz) transducer design, their low coupling coefficient limits their sensitivity. Defining a suitable sensitivity–bandwidth trade-off for miniaturized high-frequency applications requires backings with impedances of >25 MRayl and strongly attenuating to account for miniaturized requirements. The motivation of this work is related to several medical applications such as small animal, skin or eye imaging. Simulations showed that increasing the acoustic impedance of the backing from 4.5 to 25 MRayl increases transducer sensitivity by 5 dB but decreases the bandwidth, which nevertheless remains high enough for the targeted applications. In this paper, porous sintered bronze material with spherically shaped grains, size-adapted for 25–30 MHz frequency, was impregnated with tin or epoxy resin to create multiphasic metallic backings. Microstructural characterizations of these new multiphasic composites showed that impregnation was incomplete and that a third air phase was present. The selected composites, sintered bronze–tin–air and sintered bronze–epoxy–air, at 5–35 MHz characterization, produced attenuation coefficients of 1.2 and >4 dB/mm/MHz and impedances of 32.4 and 26.4 MRayl, respectively. High-impedance composites were adopted as backing (thickness = 2 mm) to fabricate focused single-element P(VDF-TrFE)-based transducers (focal distance = 14 mm). The center frequency was 27 MHz, while the bandwidth at −6 dB was 65% for the sintered-bronze–tin–air-based transducer. We evaluated imaging performance using a pulse-echo system on a tungsten wire (diameter = 25 μm) phantom. Images confirmed the viability of integrating these backings in miniaturized transducers for imaging applications.

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“…This allowed achieving lower impedance piezoelectric composites, and ultrasonic transducers with larger bandwidth, or higher center frequency [24], as well as piezoelectric paints [25] and cements [26]. Passive 0-3 connectivity composites have been largely used to produce damping backing blocks [27][28][29][30][31][32][33][34] or matching layers, where the use of nanoparticles allow for the possibility to make matching layers for high frequency applications [35,36]. Sometimes, the use of two different types of particulate matter has also been reported [29,37].…”

Section: Introductionmentioning

confidence: 99%

Micronized Recycle Rubber Particles Modified Multifunctional Polymer Composites: Application to Ultrasonic Materials Engineering

et al. 2022

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There is a growing interest in multifunctional composites and in the identification of novel applications for recycled materials. In this work, the design and fabrication of multiple particle-loaded polymer composites, including micronized rubber from end-of-life tires, is studied. The integration of these composites as part of ultrasonic transducers can further expand the functionality of the piezoelectric material in the transducer in terms of sensitivity, bandwidth, ringing and axial resolution and help to facilitate the fabrication and use of phantoms for echography. The adopted approach is a multiphase and multiscale one, based on a polymeric matrix with a load of recycled rubber and tungsten powders. A fabrication procedure, compatible with transducer manufacturing, is proposed and successfully used. We also proposed a modelling approach to calculate the complex elastic modulus, the ultrasonic damping and to evaluate the relative influence of particle scattering. It is concluded that it is possible to obtain materials with acoustic impedance in the range 2.35–15.6 MRayl, ultrasound velocity in the range 790–2570 m/s, attenuation at 3 MHz, from 0.96 up to 27 dB/mm with a variation of the attenuation with the frequency following a power law with exponent in the range 1.2–3.2. These ranges of values permit us to obtain most of the material properties demanded in ultrasonic engineering.

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Metal-Polymer Composite as an Acoustic Attenuating Material for Ultrasonic Transducers

Cited by 8 publications

References 10 publications

The Relationship of Lignin and Crude Fiber in Rice Bran with Ultrasonic Wave Parameters

The Relationship of Lignin and Crude Fiber in Rice Bran with Ultrasonic Wave Parameters

High Acoustic Impedance and Attenuation Backing for High-Frequency Focused P(VDF-TrFE)-Based Transducers

Micronized Recycle Rubber Particles Modified Multifunctional Polymer Composites: Application to Ultrasonic Materials Engineering

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