Effect of BCZT on Electrical Properties and Bioactivity of 45S5 Bioglass

Pisitpipathsin, Nuttapon; Kantha, Puripat; Eitsayeam, Sukum; Rujijanakul, Gobwut; Guo, Ruyan; Bhalla, A. S.; Pengpat, Kamonpan

doi:10.1080/10584587.2013.780574

Cited by 10 publications

(8 citation statements)

References 18 publications

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“…Their dependence on material compositions are shown in Figure 5 and the corresponding values are also listed in Table [27][28][29]. However, in this work we believe that grain sizes are mainly factor for the change in hardness values due to grain boundaries act as stress concentration sites and its free energy is normally higher than that of grains.…”

Section: Resultsmentioning

confidence: 93%

“…However, in this work we believe that grain sizes are mainly factor for the change in hardness values due to grain boundaries act as stress concentration sites and its free energy is normally higher than that of grains. Thus, the grain boundaries may prevent dislocation slip, which can harden and strengthen the materials [27][28]. Therefore, larger content of grain boundaries obtained in the sample with smaller grain induced harder material.…”

Section: Resultsmentioning

confidence: 98%

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Effect of KNbO3 on physical and electrical properties of lead-free BaTiO3 ceramic

Pisitpipathsin

Kantha

Pengpat

et al. 2015

Ceramics International

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 98%

Effect of KNbO3 on physical and electrical properties of lead-free BaTiO3 ceramic

Pisitpipathsin

Kantha

Pengpat

et al. 2015

Ceramics International

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“…Here, C is capacitance, t is thickness, A is the area of the bioglass samples, and ε 0 is the permittivity of free space. In ac conductivity determination, tanδ is dielectric loss, and ω = 2πf is the angular frequency [35,36].…”

Section: Ac Conductivity and Dielectric Analysismentioning

confidence: 99%

Impact of electrical polarization in the production of hydroxyapatite on ZnO substituted 45S5 bioglass

Singh,

Jaiswal,

Singh

et al. 2024

Phys. Scr.

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In the present investigation, we show the role of dielectric permittivity in the growth of hydroxyl carbonate apatite over ZnO-substituted 45S5 bioglass. ZnO is incorporated here in 45S5 bioglass because of its incipient dielectricity. Zinc is a necessary element for the formation, mineralization, development and maintenance of healthy bones. Here, the bioactive glass ZBG, having the general composition of 46.1 SiO2, 26.9 CaO, 2.6 P2O5, 24.4-X Na2O, and X ZnO (here X = 0 to 3 mole %), was synthesized using the traditional melting technique. The ZBG bioglass samples underwent electro-thermal poling with a voltage value of 10 kV at a temperature of 500 °C for 1 h. The impact of substituting Na2O with ZnO on the in-vitro bioactive property following submersion in simulated bodily fluid (SBF) was examined using the Fourier transform of infrared spectroscopy (FTIR) and x-ray diffraction (XRD). A comparison has been made between the dielectric constant (ε) and alternating current conductivity of unpolarized and polarized hydroxyl carbonate apatite (HCA) formed samples subjected to a 90 kV cm−1 polarisation field. Additionally, the influence of electrical poling on the ZBG samples that were created was examined via the use of XRD, scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX), and atomic force microscopy (AFM) research. The dielectric characteristics of bioactive glasses were improved by substituting Na2O with ZnO, as seen in the study. The ZBG samples immersed in SBF solution enhance the hydroxyl calcium phosphate precipitation process due to electrical interaction with the polarized sample. This result shows us that N-poled samples are more suitable for orthopaedic applications. Thus, our main aim of the present investigation is to increase the bioactivity of 45S5 glasses substituted with ZnO after polarization, which will be more suitable for orthopaedic implants.

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“…24 The addition of 15 wt% barium calcium zirconate titanate in BG has been reported to increase the dielectric constant of the composite from about 16 to 23. 25 In an another study, the dielectric constant of calcium phosphate bioglass was enhanced by 13 times (from 5 to 65) with the addition of 10 wt% of piezoelectric BZT. 26 Porwal et al 27 demonstrated that the addition of 5 vol% of graphene nanoplatelets increased the electrical conductivity of BG from 6.13 × 10 −8 to 13 S/m.…”

Section: Introductionmentioning

confidence: 96%

“…The functional performance of orthopedic implants has been demonstrated to improve by increasing the electrical activity of the composite system . The addition of 15 wt% barium calcium zirconate titanate in BG has been reported to increase the dielectric constant of the composite from about 16 to 23 . In an another study, the dielectric constant of calcium phosphate bioglass was enhanced by 13 times (from 5 to 65) with the addition of 10 wt% of piezoelectric BZT .…”

Section: Introductionmentioning

confidence: 99%

Electro-mechanical and Polarization-Induced Antibacterial Response of 45S5 Bioglass–Sodium Potassium Niobate Piezoelectric Ceramic Composites

Verma

Singh

Kumar

et al. 2020

ACS Biomater. Sci. Eng.

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Besides the excellent osteoconductivity and biocompatibility of 45S5 bioglass (BG), poor mechanical and electrical properties as well as susceptibility toward bacterial adhesion limit its widespread clinical applications. In this context, the present study investigates the effect of addition of piezoelectric sodium potassium niobate (Na0.5K0.5NbO3; NKN) on mechanical, dielectric, and antibacterial response of BG. BG–xNKN (x = 0, 10, 20, and 30 vol%) composites were synthesized at 800 °C for 30 min. The phase analyses using spectral techniques revealed the formation of the composite without any reaction between BG and piezoelectric ceramic NKN. The dielectric and electrical measurements were performed over a wide range of temperature (30–500 °C) and frequency (1 Hz–1 MHz) which suggests that space charge and dipolar polarizations are the dominant polarization mechanisms. The complex impedance analyses suggest that the average activation energies for grain and grain boundary resistances for BG–xNKN (x = 10, 20, and 30 vol%) composites are 0.59, 0.87, 0.94 and 0.76, 0.93, 1.06 eV, respectively. The issue of bacterial infection has been addressed by electrical polarization of the developed composite samples, at 20 kV for 30 min. Statistical analyses reveal that the viability of Gram-positive (S. aureus) and Gram-negative (E. coli) bacterial cells has been reduced significantly on positively and negatively charged BG–NKN composite samples, respectively. The qualitative analyses using the Kirby–Bauer test supports the above findings. Nitro blue tetrazolium and lipid peroxide assays were performed to understand the mechanism of such antibacterial response, which suggested that the combined effect of NKN addition and polarization significantly enhances the superoxide production, which kills the bacterial cells. Overall, incorporation of NKN in BG enhances the mechanical, electrical, and dielectric properties as well as improves the antibacterial response of polarized BG–xNKN composites.

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Effect of BCZT on Electrical Properties and Bioactivity of 45S5 Bioglass

Cited by 10 publications

References 18 publications

Effect of KNbO3 on physical and electrical properties of lead-free BaTiO3 ceramic

Effect of KNbO3 on physical and electrical properties of lead-free BaTiO3 ceramic

Impact of electrical polarization in the production of hydroxyapatite on ZnO substituted 45S5 bioglass

Electro-mechanical and Polarization-Induced Antibacterial Response of 45S5 Bioglass–Sodium Potassium Niobate Piezoelectric Ceramic Composites

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