Piezoelectric 1–3 Composites for High Frequency Ultrasonic Transducer Applications

Zhang, D; Su, Bo; Button, T.W.; Abrar, A.; Kirk, K.J.; Cochran, Sandy

doi:10.1080/00150190490456781

Cited by 21 publications

(12 citation statements)

References 6 publications

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“…In addition to the advantage of cost‐effectiveness and capability of micropatterning in large areas, it can also be applied to nonplanar surfaces such as tubular and spherical surfaces by using a soft mould . Through use of a disposable hard polymer mould (e.g., PMMA), micropatterned ceramics with high aspect ratios can be created . It is therefore possible to create micropatterns on complex ceramics using either hard embossing or soft moulding, depending on the shape and dimension of implant or prostheses.…”

Section: Discussionmentioning

confidence: 99%

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Embossing of micropatterned ceramics and their cellular response

Nadeem

Sjöström

Wilkinson

et al. 2013

J Biomedical Materials Res

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The aim of this work is to investigate the use of microtopographies in providing physical cues to modulate the cellular response of human mesenchymal stem cells on ceramics. Two microgrooved patterns (100 μm/50 μm, 10 μm/10 μm groove/pitch) were transcribed reversely onto alumina green ceramic tapes via an embossing technique followed by sintering. Characterization of the micropatterned alumina surfaces and their cellular response was carried out. Spread and polygonal cell morphologies were observed on the wider groove (50 μm/100 μm) surface. Cells seeded onto the narrow groove (10 μm/10 μm) surface aligned themselves alongside the grooves, resulting in more elongated cell morphology. More osteoid matrix nodules shown by osteopontin and osteocalcin biomarkers were detected on the larger grooved surfaces after cell culture of 21 days, indicating a greater level of osteogenicity. This study has shown that micropatterned wider groove (50 μm) topographies are more suitable surfaces for improving osseointegration of ceramic implants.

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Section: Discussionmentioning

confidence: 99%

“…32 Through use of a disposable hard polymer mould (e.g., PMMA), micropatterned ceramics with high aspect ratios can be created. 33,34 It is therefore possible to create micropatterns on complex ceramics using either hard embossing or soft moulding, depending on the shape and dimension of implant or prostheses.…”

Section: Discussionmentioning

confidence: 99%

Embossing of micropatterned ceramics and their cellular response

Nadeem

Sjöström

Wilkinson

et al. 2013

J Biomedical Materials Res

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“…Our results for 4 mol% PLBSZNT conform to the prerequisites with a high dielectric permittivity, high piezoelectric properties, low dielectric loss. Hence, it can be concluded that this composition could be compatible for bio-medical applications (Bove et al 2001;Eremkin et al 2004;Kutnjak et al 2006;Yamashita et al 1998;Zhang et al 2004).…”

Section: Piezoelectric Propertiesmentioning

confidence: 92%

PLZT-Modified Relaxor Piezoelectric Ceramic System for Medical Diagnostic Applications

Ramam

López

2008

Applied Bionics and Biomechanics

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The piezoelectric ceramic system [Pb 0.978−y La 0.012 Ba 0.01 Sr y ][(Zr 0.534 Ti 0.466 ) 0.987 Nb 0.008 ]O 3 (PLBSZNT) has been fabricated for use in medical diagnostics applications. The fundamental pre-requisites are high-density, high dielectric constant and high piezoelectric properties that serve as compatible ceramic materials for medical diagnostic applications. It is essential for sensitive transducers that the piezoelectric ceramics must efficiently convert between electrical and mechanical energy, and so the electromechanical coupling coefficients should be high, as the fabrication process of tiny elements for medical arrays must be carried out without damaging the material and its properties. In our study, Sr-modified PLBZNT had shown single ferroelectric tetragonal phase. An analysis of different Sr doping concentration is reported, and the high dielectric permittivity, low dielectric loss along with high electromechanical properties indicate that PLBSZNT is suitable for medical diagnostic applications as well as sensors and actuators.

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“…Not only large components/structures (>1 mm) such as rods, tubes, springs and domes but also small structures (<100 m) such as microrod arrays and thick films have been successfully demonstrated (Su et al, 2001b). For example, PZT microrod arrays have been produced using embossing technique to fabricate PZT/epoxy 1-3 composites for biomedical imaging transducers (Su et al, 2002;Zhang et al, 2004). PZT fibres with excellent properties have been extruded for the fabrication of smart composites (Nelson et al, 2006).…”

Section: Introductionmentioning

confidence: 97%

Piezoelectric 1–3 Composites for High Frequency Ultrasonic Transducer Applications

Cited by 21 publications

References 6 publications

Embossing of micropatterned ceramics and their cellular response

Embossing of micropatterned ceramics and their cellular response

PLZT-Modified Relaxor Piezoelectric Ceramic System for Medical Diagnostic Applications

A comparative study of viscous polymer processed ceramics based on aqueous and non-aqueous binder systems

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