Characterization of some bioglass–ceramics

ElBatal, H.A.; Azooz, M. A.; Khalil, E. M. A.; Monem, Ahmed Soltan; Hamdy, Y.M.

doi:10.1016/s0254-0584(03)00082-8

Cited by 151 publications

(110 citation statements)

References 15 publications

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“…Many efforts have been made to regulate the composition of the bioglass in order to tailor the thermal expansion coefficient of the coating to that of the substrate, such as increasing the content of SiO 2 or addition of B 2 O 3 , considering both have lower thermal expansion factors. [9,10] However, the bioactivity of the bioglass decreases strongly as the content of SiO 2 increases. Besides, bioglass with higher content of SiO 2 would require higher melting temperature.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of bioactive glass coatings obtained by pulsed laser deposition

Zhao

Song

Liu

2008

Surface & Interface Analysis

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Section: Introductionmentioning

confidence: 99%

Characteristics of bioactive glass coatings obtained by pulsed laser deposition

Zhao

Song

Liu

2008

Surface & Interface Analysis

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“…The calculated NC for these glasses falls into the optimum range for bioactivity at 2.2 assuming Y and Ce act as network modifiers, and approach/exceed the upper limit when calculated as formers, however previous studies have found both to act primarily as network modifiers [9,34,46,47]. Glass formation and processing is verified through XRD that a completely amorphous structure was achieved for each glass, thereby avoiding potential mismatched onset times for the formation of a HCA layer seen with partially to fully crystallized materials [48,49], and average particle size for the glass powders falls within a 1 µm range further ensuring consistency between samples. Thermal analysis of the glasses was used to evaluate any change in the Tg where an increase in Tg represents greater stability of the glass network, which can be an effect of ionic differences or often as a result of increased quantities of BOs and higher NC [37,38].…”

Section: Discussionmentioning

confidence: 76%

Characterization of Y2O3 and CeO2 doped SiO2-SrO-Na2O glasses

Placek¹,

Keenan²,

Laffir³

et al. 2015

Biomedical Glasses

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Abstract:The structural effects of yttrium (Y) and cerium (Ce) are investigated when substituted for sodium (Na) in a 0.52SiO 2 -0.24SrO-(0.24−x)Na 2 O-xMO (where x = 0.08; MO = Y 2 O 3 and CeO 2 ) glass series. Network connectivity (NC) was calculated assuming both Y and Ce can act as a network modifier (NC = 2.2) or as a network former (NC up to 2.9). Thermal analysis showed an increase in glass transition temperature (Tg) with increasing Y and Ce content, Y causing the greater increase from the control (Con) at 493 ∘ C to 8 mol% Y (HY) at 660 ∘ C. Vickers hardness (HV)was not significantly different between glasses. 29 Si MagicAngle Spinning-Nuclear Magnetic Resonance (MAS-NMR) did not show peak shift with addition of Y, however Ce produced peak broadening and a negative shift in ppm. The addition of 4 mol% Ce in the YCe and LCe glasses shifted the peak from Con at −81.3 ppm to −82.8 ppm and −82.7 ppm respectively; while the HCe glass produced a much broader peak and a shift to −84.8 ppm. High resolution X-ray Photoelectron Spectroscopy for the O 1s spectral line showed the ratio of bridging (BO) to non-bridging oxygens (NBO), BO:NBO, was altered, where Con had a ratio of 0.7, HY decreased to 0.4 and HCe to 0.5.

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“…The main characteristic bands of poly(L-lactide) as reported elsewhere (13,14) , these bands are ascribed to: carbonyl modes [C=O] at 1788 cm The sol-gel sodium calcium silicate ceramic characteristic bands was reported by El Batal et al (15) , these bands are ascribed to: Si-O-Si (b) in the range of 400-500 cm , Si-O-Si (stretch) at 1042 cm -1 and additional band at wavenumbers 627 cm -1 which is due to presence of sodium calcium silicate crystalline phase (16) .…”

Section: Ft-ir Analysismentioning

confidence: 72%

Preparation, Characterization and In vitro Evaluation of Poly (L-lactide) and Sodium Calcium Silicate Ceramic Composites

2015

Egypt. J. Biophys. Biomed. Engng.

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HE MAIN objectives of the present study were to fabricate …...sodium calcium silicate ceramic /poly(L-lactide) composite membranes for bone engineering applications, by using liquid-liquid phase separation. The membranes were characterized by SEM, FT-IR, TGA and TF-XRD. Examination of the SEM microphotographs revealed that the pore diameter of the composites decreased as the ceramic content increased. For the composites containing ceramic content of 20 wt% (CP20) and 30 wt% (CP30), the maximum pore diameter was 70 µm and 55 µm, respectively.In vitro bioactivity evaluation showed that the composites were able to induce the formation of hydroxyapaptite layer on their surfaces, demonstrating their potential application in bone engineering.

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Characterization of some bioglass–ceramics

Cited by 151 publications

References 15 publications

Characteristics of bioactive glass coatings obtained by pulsed laser deposition

Characteristics of bioactive glass coatings obtained by pulsed laser deposition

Characterization of Y2O3 and CeO2 doped SiO2-SrO-Na2O glasses

Preparation, Characterization and In vitro Evaluation of Poly (L-lactide) and Sodium Calcium Silicate Ceramic Composites

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