Effect of deposition temperature on the microstructure, ferroelectric and mechanical properties of lead free BCZT ceramic thin films

Prabahar, K.; Ranjith, R.; Srinivas, A.; Kamat, S.V.; Mallesham, B.; Niranjani, V.L.; Praveen, J. Paul; Das, Dibakar

doi:10.1016/j.ceramint.2017.01.032

Cited by 20 publications

(13 citation statements)

References 27 publications

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“…Particularly, the BT‐derivative (Ba,Ca)(Zr,Ti)O 3 (BCZT) is of interest because of exceptionally high piezoelectric values compared to other lead‐free piezoelectric materials available today (Liu & Ren, ). Additionally, fracture analysis studies of BCZT indicate that the hardness values of BCZT are approximately one to two orders of magnitude larger than human bone tissue, and approximately of the same order of magnitude for fracture toughness (Esguerra‐Arce et al, ; Lucksanasombool, Higgs, Higgs, & Swain, ; Öhman, Zwierzak, Baleani, & Viceconti, ; Phelps, Hubbard, Wang, & Agrawal, ; Prabahar et al, ; Rattanachan, Miyashita, & Mutoh, ; Sailaja et al, ; Srinivas et al, ; Zioupos & Currey, ).…”

Section: Introductionmentioning

confidence: 99%

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

et al. 2019

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Total joint replacement implants are generally designed to physically mimic the biological environment to ensure compatibility with the host tissue. However, implant instability exposes patients to long recovery periods, high risk for revision surgeries, and high expenses. Introducing electrical stimulation to the implant site to accelerate healing is promising, but the cumbersome nature of wired devices is detrimental to the implant design. We propose a novel strategy to stimulate cells at the implant site by utilizing piezoelectric ceramics as electrical stimulation sources. The inherent ability of these materials to form electric surface potentials under mechanical load allows them to act as internal power sources. This characteristic is commonly exploited in non‐biomedical applications such as transducers or sensors. We investigate calcium/zirconium‐doped barium titanate (BCZT) ceramics in an in vitro environment to determine their potential as implant materials. BCZT exhibits low cytotoxicity with human osteoblast and endothelial cells as well as high piezoelectric responses. Microstructural adaptation was identified as a route for optimizing piezoelectric behavior. Our results show that BCZT is a promising system for biomedical applications. Its characteristic ability to autonomously generate electric surface potentials opens the possibility to functionalize existing bone replacement implant designs to improve implant ingrowth and long‐term stability.

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Section: Introductionmentioning

confidence: 99%

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

et al. 2019

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“…Piezoceramic materials suffer by inherent brittleness, which is usually one order lower as compared to the structural ceramics. Also, changes of mechanical properties during poling and/or after the application of electric field were reported [8][9][10].…”

Section: Piezoceramic Materialsmentioning

confidence: 99%

Electro-mechanical analysis of a multilayer piezoelectric cantilever energy harvester upon harmonic vibrations

et al. 2018

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This paper addresses an important issue of the individual layer thickness influence in a multilayer piezo composite on electro-mechanical energy conversion. The use of energy harvesting systems seems to be very promising for applications such as ultra-low power electronics, sensors and wireless communication. The energy converters are often disabled due to a failure of the piezo layer caused by an excessive deformation/stresses occurring upon the operation. It is thus desirable to increase both reliability and efficiency of the electromechanical conversion as compared to standard concepts. The proposed model of the piezoelectric vibration energy harvester is based on a multilayer beam design with active piezo and protective ceramic layers. This paper presents results of a comparative study of an analytical and numerical approach used for the electro-mechanical simulations of the multilayer energy harvesting systems. Development of the functional analytical model is crucial for the further optimization of new (smart material based) energy harvesting systems, since it provides much faster response than the numerical model.

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“…In this work, we have achieved a combinatorial epitaxy-like heterostructure of lead free Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 (BCZT) and CoFe 2 O 4 (CFO) at the nanoscale with various grain orientation and simultaneously retaining an atomically sharp epitaxy-like interface. BCZT (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 ), a lead-free piezoelectric material which shows large piezoelectric coefficient (∼620 pC/N). , Similarly, CoFe 2 O 4 (CFO) has a large magnetostrictive coefficient (∼200 ppm) which is a semihard magnetic material with a cubic spinel structure and shows very high strain sensitivity compared to other ferrites. , Since, both BCZT and CFO have a lattice match with lower order and higher-order peaks, respectively, the combination of these were chosen aiming at epitaxy-like growth between different grain orientations. To establish such a growth it is essential to have a continuous columnar growth of both the phases as shown in the schematic in Figure (c).…”

Section: Introductionmentioning

confidence: 99%

Grain to Grain Epitaxy-Like Nano Structures of (Ba,Ca)(ZrTi)O₃/ CoFe₂O₄ for Magneto–Electric Based Devices

Prabahar

Bhat

Srinivas

et al. 2020

ACS Appl. Nano Mater.

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Multiferroic nanocomposites with grain to grain epitaxy-like feature comprising of Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT)/CoFe2O4 (CFO)/BCZT layers were deposited on Pt/TiO2/SiO2/Si substrates by pulsed laser deposition. To enhance strain coupling between the phases, vertically ordered continuous nanostructures with grain to grain epitaxy-like feature was achieved by careful choice of material and optimized growth conditions. The columnar grains between the BCZT/CFO and CFO/BCZT interface were optimized such that every column grew in an epitaxy-like growth with grain-over grain crystallographic relation even at nanoscale. Grain to grain epitaxy was evident from TEM analysis (inverse FFT analysis). Elastic strain coupling present between various vibrational modes of BCZT and CFO was confirmed by cross-sectional Raman studies. Ferroelectric polarization of 10 μC/cm2 and out-of-plane remnant magnetization (40emu/cc) was observed in the columnar structure. The morphologically coherent columnar structure of both the phases and the epitaxial registry at the interface of the composite significantly enhanced the strain coupling between the ferroelectric/ferromagnetic phases, which is evident from the magneto–dielectric studies with a 21% change in dielectric constant and the magneto–electric(ME) coefficients (620–840 mV/cm·Oe). The ME values indicate the existence of high elastic strain coupling in continuous columnar structures compared with granular structures with an incoherent interface. Enhanced magneto–electric coupling in these types of nanostructures can be of great potential in realizing devices like actuators and sensors.

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Effect of deposition temperature on the microstructure, ferroelectric and mechanical properties of lead free BCZT ceramic thin films

Cited by 20 publications

References 27 publications

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

Electro-mechanical analysis of a multilayer piezoelectric cantilever energy harvester upon harmonic vibrations

Grain to Grain Epitaxy-Like Nano Structures of (Ba,Ca)(ZrTi)O₃/ CoFe₂O₄ for Magneto–Electric Based Devices

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Effect of deposition temperature on the microstructure, ferroelectric and mechanical properties of lead free BCZT ceramic thin films

Cited by 20 publications

References 27 publications

Biocompatibility of (Ba,Ca)(Zr,Ti)O3 piezoelectric ceramics for bone replacement materials

Biocompatibility of (Ba,Ca)(Zr,Ti)O3 piezoelectric ceramics for bone replacement materials

Electro-mechanical analysis of a multilayer piezoelectric cantilever energy harvester upon harmonic vibrations

Grain to Grain Epitaxy-Like Nano Structures of (Ba,Ca)(ZrTi)O3/ CoFe2O4 for Magneto–Electric Based Devices

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Product

Resources

About

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

Grain to Grain Epitaxy-Like Nano Structures of (Ba,Ca)(ZrTi)O₃/ CoFe₂O₄ for Magneto–Electric Based Devices