Sol-gel bioactive glass-ceramics Part II: Glass-ceramics in the CaO-SiO2-P2O5-MgO system

Radev, Lachezar; Hristov, Vladimir; Michailova, Irena; Samuneva, B.

doi:10.2478/s11532-009-0014-2

Cited by 13 publications

(7 citation statements)

References 46 publications

(55 reference statements)

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“…7) [29]. The presence of peaks characteristic of C-O stretching vibrations at 1450 and 1410 cm −1 allows the classification of this layer as a B-substituted hycroxycarbonate apatite [30]. It is also worthy of mention that the peak around 930 cm −1 , characteristic of Si-OH stretching in Q 2 and Q 1 units is maintained in sample B1C even after 14 days of bioactivity (Fig.…”

Section: Resultsmentioning

confidence: 94%

Enhanced apatite precipitation on a biopolymer-coated bioactive glass

Araújo¹,

Miola²,

Venturello³

et al. 2015

Biomedical Glasses

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In this work, sintered pellets of a silica-based bioactive glass were dip-coated with a biocompatible natural-derived polymer in order to investigate the influence of the organic coating on the glass bioactivity. After the sintering process optimization, uncoated and coated pellets have been characterized by means of scanning electron microscopy with energy dispersive spectroscopy (SEM, EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and pH measurements, after the immersion in a simulated body fluid (SBF). An increased apatite forming ability and a better control of the pH during soaking of the samples in SBF were observed in the presence of the biopolymer. This result opens a new insight on the simple fabrication of highly bioactive hybrid inorganic-organic materials for medical applications.

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Section: Resultsmentioning

confidence: 94%

Enhanced apatite precipitation on a biopolymer-coated bioactive glass

Araújo¹,

Miola²,

Venturello³

et al. 2015

Biomedical Glasses

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“…Elemental compositions were confirmed using wavelength dispersive X‐ray fluorescence (WD‐XRF). In turtle shell, bonds stretched at 1000–1050 cm −1 , with the starting bond at 500 cm −1 , due to Si–O–Si bond stretching . Bond stretching at 932 cm −1 in turtle shell associated with rock was assigned because of Si–O–Ca bonds …”

Section: Resultsmentioning

confidence: 97%

Study of thermoluminescence in turtle shell fossils using radiation dosimetry

Ovhal

Samant

Dhoble³

et al. 2019

Luminescence

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The present study describes for the first time thermoluminescence (TL) characterization of turtle shell. A fossil shell was collected from the Dongargaon area in the Chandrapur district of Maharashtra, India. TL was recorded and a comparative study of TL for the above material was performed to understand the special TL characteristics of the shell. The shell was irradiated with 60 Co γ-radiation to study its TL properties. The sample displayed two good TL peaks at 135°C and 255°C. A linear dose-response curve for the irradiated sample was produced for the dose range 0.79-28.5 kGy; this sample of turtle shell (fossil) may be useful as a high dose dosimetry phosphor in this range. This geological sample was further characterized using X-ray diffraction to confirm its phase structure and by scanning electron microscopy , Fourier transform infrared and wavelength dispersive X-ray fluorescence spectroscopy to determine morphology, vibration, and elemental composition as ppm or percentage of the sample, respectively. Kinetic parameters of the TL glow peak were calculated using three different methods.

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“…The EDS spectra as shown in Fig. 3 suggested the forming of dendrite of carbonate substituted hydroxyapatite 49 which was rich in Ca, P, C, Cl, and Mg similar to glass ceramic systems 50 . Side view of apatite growing by SEM image as shown in Fig.…”

Section: Apatite Formation After Sbf Immersionmentioning

confidence: 92%

Bioactivity enhancement of calcined kaolin geopolymer with CaCl2 treatment

Pangdaeng¹,

Sata²,

Aguiar³

et al. 2016

ScienceAsia

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This paper reports that surface treatment with CaCl 2 enhances the bioactivity of a calcined kaolin geopolymer. Calcined kaolin, NaOH solution, sodium silicate solution, and heat curing were used to form geopolymer pastes. A soaked-treatment method was applied to the geopolymer samples using CaCl 2 solution as the ion exchange agent. The bioactivity of the material was determined by the simulated body fluid (SBF) in vitro testing method. Scanning electron microscope images showed a dense apatite formation on the treated geopolymer surface after SBF immersion for only 3 days. The CaCl 2 treatment promoted compressive strength and enhanced bioactivity by accelerating apatite precipitation and slowing down the rise in pH.

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Sol-gel bioactive glass-ceramics Part II: Glass-ceramics in the CaO-SiO2-P2O5-MgO system

Cited by 13 publications

References 46 publications

Enhanced apatite precipitation on a biopolymer-coated bioactive glass

Enhanced apatite precipitation on a biopolymer-coated bioactive glass

Study of thermoluminescence in turtle shell fossils using radiation dosimetry

Bioactivity enhancement of calcined kaolin geopolymer with CaCl2 treatment

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